diff --git a/go.mod b/go.mod
index e23b785dab1019a7cfb37d1c750f64a0a620aa94..4a82fbec0e49aa45415ca88d6e6331d477fdd44b 100644
--- a/go.mod
+++ b/go.mod
@@ -3,20 +3,20 @@ module git.perx.ru/perxis/perxis-go
 go 1.18
 
 require (
-	github.com/getsentry/sentry-go v0.12.0
+	github.com/antonmedv/expr v1.9.0
 	github.com/go-kit/kit v0.12.0
 	github.com/golang/protobuf v1.5.2
+	github.com/gosimple/slug v1.13.1
 	github.com/hashicorp/go-multierror v1.1.1
-	github.com/json-iterator/go v1.1.12
 	github.com/pkg/errors v0.9.1
 	github.com/rs/xid v1.4.0
-	github.com/stretchr/testify v1.7.0
-	go.uber.org/zap v1.19.1
-	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519
-	golang.org/x/net v0.0.0-20211008194852-3b03d305991f
+	github.com/stretchr/testify v1.8.0
+	go.mongodb.org/mongo-driver v1.11.4
+	golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d
+	golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2
 	google.golang.org/grpc v1.45.0
 	google.golang.org/protobuf v1.28.0
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
+	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
@@ -24,13 +24,10 @@ require (
 	github.com/go-kit/log v0.2.0 // indirect
 	github.com/go-logfmt/logfmt v0.5.1 // indirect
 	github.com/google/go-cmp v0.5.7 // indirect
+	github.com/gosimple/unidecode v1.0.1 // indirect
 	github.com/hashicorp/errwrap v1.0.0 // indirect
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/stretchr/objx v0.1.0 // indirect
-	go.uber.org/atomic v1.9.0 // indirect
-	go.uber.org/multierr v1.7.0 // indirect
+	github.com/stretchr/objx v0.4.0 // indirect
 	golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac // indirect
 	golang.org/x/text v0.3.7 // indirect
 	google.golang.org/genproto v0.0.0-20210917145530-b395a37504d4 // indirect
diff --git a/go.sum b/go.sum
index 0ab6716f3bce03b91f9e89ca8c25933326d22163..1f26de451e3ef4f777baaefada69e5af8b447921 100644
--- a/go.sum
+++ b/go.sum
@@ -1,18 +1,11 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/AndreasBriese/bbloom v0.0.0-20190306092124-e2d15f34fcf9/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/CloudyKit/fastprinter v0.0.0-20200109182630-33d98a066a53/go.mod h1:+3IMCy2vIlbG1XG/0ggNQv0SvxCAIpPM5b1nCz56Xno=
-github.com/CloudyKit/jet/v3 v3.0.0/go.mod h1:HKQPgSJmdK8hdoAbKUUWajkHyHo4RaU5rMdUywE7VMo=
-github.com/Joker/hpp v1.0.0/go.mod h1:8x5n+M1Hp5hC0g8okX3sR3vFQwynaX/UgSOM9MeBKzY=
+github.com/DATA-DOG/go-sqlmock v1.3.3/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/Shopify/goreferrer v0.0.0-20181106222321-ec9c9a553398/go.mod h1:a1uqRtAwp2Xwc6WNPJEufxJ7fx3npB4UV/JOLmbu5I0=
-github.com/ajg/form v1.5.1/go.mod h1:uL1WgH+h2mgNtvBq0339dVnzXdBETtL2LeUXaIv25UY=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
-github.com/aymerick/raymond v2.0.3-0.20180322193309-b565731e1464+incompatible/go.mod h1:osfaiScAUVup+UC9Nfq76eWqDhXlp+4UYaA8uhTBO6g=
-github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
-github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
+github.com/antonmedv/expr v1.9.0 h1:j4HI3NHEdgDnN9p6oI6Ndr0G5QryMY0FNxT4ONrFDGU=
+github.com/antonmedv/expr v1.9.0/go.mod h1:5qsM3oLGDND7sDmQGDXHkYfkjYMUX14qsgqmHhwGEk8=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
@@ -24,18 +17,12 @@ github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWH
 github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20210922020428-25de7278fc84/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/codegangsta/inject v0.0.0-20150114235600-33e0aa1cb7c0/go.mod h1:4Zcjuz89kmFXt9morQgcfYZAYZ5n8WHjt81YYWIwtTM=
-github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
-github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
-github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
-github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
+github.com/davecgh/go-spew v0.0.0-20161028175848-04cdfd42973b/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dgraph-io/badger v1.6.0/go.mod h1:zwt7syl517jmP8s94KqSxTlM6IMsdhYy6psNgSztDR4=
-github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
-github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
-github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385/go.mod h1:0vRUJqYpeSZifjYj7uP3BG/gKcuzL9xWVV/Y+cK33KM=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
@@ -43,34 +30,18 @@ github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.m
 github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
 github.com/envoyproxy/go-control-plane v0.9.10-0.20210907150352-cf90f659a021/go.mod h1:AFq3mo9L8Lqqiid3OhADV3RfLJnjiw63cSpi+fDTRC0=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
-github.com/etcd-io/bbolt v1.3.3/go.mod h1:ZF2nL25h33cCyBtcyWeZ2/I3HQOfTP+0PIEvHjkjCrw=
-github.com/fasthttp-contrib/websocket v0.0.0-20160511215533-1f3b11f56072/go.mod h1:duJ4Jxv5lDcvg4QuQr0oowTf7dz4/CR8NtyCooz9HL8=
-github.com/fatih/structs v1.1.0/go.mod h1:9NiDSp5zOcgEDl+j00MP/WkGVPOlPRLejGD8Ga6PJ7M=
-github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
-github.com/gavv/httpexpect v2.0.0+incompatible/go.mod h1:x+9tiU1YnrOvnB725RkpoLv1M62hOWzwo5OXotisrKc=
-github.com/getsentry/sentry-go v0.12.0 h1:era7g0re5iY13bHSdN/xMkyV+5zZppjRVQhZrXCaEIk=
-github.com/getsentry/sentry-go v0.12.0/go.mod h1:NSap0JBYWzHND8oMbyi0+XZhUalc1TBdRL1M71JZW2c=
+github.com/gdamore/encoding v1.0.0/go.mod h1:alR0ol34c49FCSBLjhosxzcPHQbf2trDkoo5dl+VrEg=
+github.com/gdamore/tcell v1.3.0/go.mod h1:Hjvr+Ofd+gLglo7RYKxxnzCBmev3BzsS67MebKS4zMM=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
-github.com/gin-contrib/sse v0.0.0-20190301062529-5545eab6dad3/go.mod h1:VJ0WA2NBN22VlZ2dKZQPAPnyWw5XTlK1KymzLKsr59s=
-github.com/gin-gonic/gin v1.4.0/go.mod h1:OW2EZn3DO8Ln9oIKOvM++LBO+5UPHJJDH72/q/3rZdM=
-github.com/go-check/check v0.0.0-20180628173108-788fd7840127/go.mod h1:9ES+weclKsC9YodN5RgxqK/VD9HM9JsCSh7rNhMZE98=
-github.com/go-errors/errors v1.0.1 h1:LUHzmkK3GUKUrL/1gfBUxAHzcev3apQlezX/+O7ma6w=
-github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
 github.com/go-kit/kit v0.12.0 h1:e4o3o3IsBfAKQh5Qbbiqyfu97Ku7jrO/JbohvztANh4=
 github.com/go-kit/kit v0.12.0/go.mod h1:lHd+EkCZPIwYItmGDDRdhinkzX2A1sj+M9biaEaizzs=
 github.com/go-kit/log v0.2.0 h1:7i2K3eKTos3Vc0enKCfnVcgHh2olr/MyfboYq7cAcFw=
 github.com/go-kit/log v0.2.0/go.mod h1:NwTd00d/i8cPZ3xOwwiv2PO5MOcx78fFErGNcVmBjv0=
 github.com/go-logfmt/logfmt v0.5.1 h1:otpy5pqBCBZ1ng9RQ0dPu4PN7ba75Y/aA+UpowDyNVA=
 github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
-github.com/go-martini/martini v0.0.0-20170121215854-22fa46961aab/go.mod h1:/P9AEU963A2AYjv4d1V5eVL1CQbEJq6aCNHDDjibzu8=
-github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee/go.mod h1:L0fX3K22YWvt/FAX9NnzrNzcI4wNYi9Yku4O0LKYflo=
-github.com/gobwas/pool v0.2.0/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
-github.com/gobwas/ws v1.0.2/go.mod h1:szmBTxLgaFppYjEmNtny/v3w89xOydFnnZMcgRRu/EM=
-github.com/golang-jwt/jwt v3.2.2+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
@@ -84,211 +55,118 @@ github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
-github.com/gomodule/redigo v1.7.1-0.20190724094224-574c33c3df38/go.mod h1:B4C85qUVwatsJoIUNIfCRsp7qO0iAmpGFZ4EELWSbC4=
+github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.7 h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o=
 github.com/google/go-cmp v0.5.7/go.mod h1:n+brtR0CgQNWTVd5ZUFpTBC8YFBDLK/h/bpaJ8/DtOE=
-github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
-github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
-github.com/gorilla/websocket v1.4.1/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/gosimple/slug v1.13.1 h1:bQ+kpX9Qa6tHRaK+fZR0A0M2Kd7Pa5eHPPsb1JpHD+Q=
+github.com/gosimple/slug v1.13.1/go.mod h1:UiRaFH+GEilHstLUmcBgWcI42viBN7mAb818JrYOeFQ=
+github.com/gosimple/unidecode v1.0.1 h1:hZzFTMMqSswvf0LBJZCZgThIZrpDHFXux9KeGmn6T/o=
+github.com/gosimple/unidecode v1.0.1/go.mod h1:CP0Cr1Y1kogOtx0bJblKzsVWrqYaqfNOnHzpgWw4Awc=
 github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
 github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/go-multierror v1.1.1 h1:H5DkEtf6CXdFp0N0Em5UCwQpXMWke8IA0+lD48awMYo=
 github.com/hashicorp/go-multierror v1.1.1/go.mod h1:iw975J/qwKPdAO1clOe2L8331t/9/fmwbPZ6JB6eMoM=
-github.com/hashicorp/go-version v1.2.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
-github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
-github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
-github.com/imkira/go-interpol v1.1.0/go.mod h1:z0h2/2T3XF8kyEPpRgJ3kmNv+C43p+I/CoI+jC3w2iA=
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@@ -299,14 +177,10 @@ golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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@@ -349,21 +223,13 @@ google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscL
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-gopkg.in/mgo.v2 v2.0.0-20180705113604-9856a29383ce/go.mod h1:yeKp02qBN3iKW1OzL3MGk2IdtZzaj7SFntXj72NppTA=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
-gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20191120175047-4206685974f2/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/pkg/errors/error.go b/pkg/errors/error.go
deleted file mode 100644
index cb8ec386db413ecc1a8f33f6dddd45c29359ea85..0000000000000000000000000000000000000000
--- a/pkg/errors/error.go
+++ /dev/null
@@ -1,51 +0,0 @@
-package errors
-
-//import (
-//	"errors"
-//)
-
-//var (
-//	ErrSpaceRequired      = errors.New("space required")
-//	ErrSpaceHostRequired  = errors.New("space host required")
-//	ErrSpaceNotFound      = errors.New("space not found")
-//	ErrSpaceAlreadyExists = errors.New("space already exists")
-//)
-//
-//var errs = []error{
-//	ErrSpaceRequired,
-//	ErrSpaceHostRequired,
-//	ErrSpaceNotFound,
-//	ErrSpaceAlreadyExists,
-//}
-//
-//var errMap map[string]error
-//
-////func New(text string) error {
-////	if errMap == nil {
-////		errMap = make(map[string]error)
-////		for _, e := range errs {
-////			errMap[e.Error()] = e
-////		}
-////	}
-////
-////	if e, ok := errMap[text]; ok {
-////		return e
-////	}
-////
-////	return errors.New(text)
-////}
-//
-//func IsAny(err error, targets ...error) bool {
-//	for _, t := range targets {
-//		if errors.Is(err, t) {
-//			return true
-//		}
-//	}
-//	return false
-//}
-//
-//var (
-//	Is     = errors.Is
-//	As     = errors.As
-//	Unwrap = errors.Unwrap
-//)
diff --git a/pkg/errors/errors.go b/pkg/errors/errors.go
index 952cd8688db8dffe737f63ccba6e1abd4521f715..1b3fe1b2198272d8c17c71fc28ae315b686a4ae5 100644
--- a/pkg/errors/errors.go
+++ b/pkg/errors/errors.go
@@ -14,59 +14,4 @@ var (
 	Errorf = errors.Errorf
 	Wrap   = errors.Wrap
 	Wrapf  = errors.Wrapf
-
-//Wrap          = errors.Wrap
-//Wrapf         = errors.Wrapf
-//WithMessage   = errors.WithMessage
-//CombineErrors = errors.CombineErrors
-////Detail    = errors.Detail
-////WithDetailf   = errors.WithDetailf
-////WithHint = errors.WithHint
-
-//Mark   = errors.Mark
-//Tags   = errors.WithContextTags
-//
-//CoreDomain      = errors.Domain("core")
-//StorageDomain   = errors.Domain("storage")
-//ServiceDomain   = errors.Domain("service")
-//TransportDomain = errors.Domain("transport")
-//EventsDomain    = errors.Domain("events")
 )
-
-//func New(msg string) error {
-//	return &Error{Message: msg}
-//}
-
-//func Trace(err error) error {
-//	return WithStack(WithID(err))
-//}
-//
-//func Wrap(err error, msg string) error {
-//	return WithID(errors.Wrap(err, msg))
-//}
-//
-//func ErrorBuilder(domain string) func(string) error {
-//	return func(msg string) error {
-//		return WithDomain(WithID(New(msg)), domain)
-//	}
-//}
-//
-//func ErrorfBuilder(domain string) func(format string, args ...interface{}) error {
-//	return func(format string, args ...interface{}) error {
-//		return WithDomain(WithID(Errorf(format, args...)), domain)
-//	}
-//}
-//
-//type Error struct {
-//	Message string
-//}
-//
-//func (e *Error) Error() string { return e.Message }
-//func (e *Error) Is(err error) bool {
-//	if errr, ok := err.(*Error); ok {
-//		if e.Message == errr.Message {
-//			return true
-//		}
-//	}
-//	return false
-//}
diff --git a/pkg/expr/bench.txt b/pkg/expr/bench.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0a8b9b81854561ae9a0ea3484a3fe8c9a544565b
--- /dev/null
+++ b/pkg/expr/bench.txt
@@ -0,0 +1,30 @@
+------
+BenchmarkConvertToMongo
+------
+Конвертация выражения expr `id in [ ...ids ]` в формат bson.
+
+test 1:
+
+Количество идентификаторов в фильтре: 10_000
+Размер выражения: 230007b (0,2Mb)
+
+goos: darwin
+goarch: amd64
+pkg: github.com/perxteam/perxis/pkg/expr
+cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
+BenchmarkConvertToMongo-12            27          44312238 ns/op        13374293 B/op      81067 allocs/op
+PASS
+ok      github.com/perxteam/perxis/pkg/expr     2.572s
+
+test 2:
+
+Количество идентификаторов в фильтре: 1_000_000
+Размер выражения: 23000007b (21,9Mb)
+
+goos: darwin
+goarch: amd64
+pkg: github.com/perxteam/perxis/pkg/expr
+cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
+BenchmarkConvertToMongo-12             1        4142071283 ns/op        1064427296 B/op  7135952 allocs/op
+PASS
+ok      github.com/perxteam/perxis/pkg/expr     4.646s
diff --git a/pkg/expr/config.go b/pkg/expr/config.go
new file mode 100644
index 0000000000000000000000000000000000000000..628111173d92f81ccdcc5e4c40b1aecc2ff27626
--- /dev/null
+++ b/pkg/expr/config.go
@@ -0,0 +1,85 @@
+package expr
+
+import (
+	"github.com/antonmedv/expr"
+	"github.com/antonmedv/expr/conf"
+)
+
+type ExprConfig struct {
+	options []expr.Option
+}
+
+func (c *ExprConfig) RegisterOption(opt ...expr.Option) {
+	c.options = append(c.options, opt...)
+}
+
+func (c *ExprConfig) GetConfig(e map[string]interface{}) *conf.Config {
+	cfg := conf.New(e)
+
+	cfg.Operators = make(map[string][]string)
+	for _, opt := range c.options {
+		opt(cfg)
+	}
+
+	return cfg
+}
+
+var defaultConfig *ExprConfig
+
+func init() {
+	defaultConfig = &ExprConfig{}
+}
+
+func RegisterOption(opt ...expr.Option) {
+	defaultConfig.RegisterOption(opt...)
+}
+
+func GetDefaultConfig(e map[string]interface{}) *conf.Config {
+	return defaultConfig.GetConfig(e)
+}
+
+//func GetDefaultEnv(e map[string]interface{}) map[string]interface{} {
+//	return defaultConfig.GetEnv(e)
+//}
+
+func Extend(kv ...interface{}) expr.Option {
+	e := make(map[string]interface{})
+	i := 0
+	for {
+		if i+2 > len(kv) {
+			break
+		}
+		k, v := kv[i], kv[i+1]
+		name, kOk := k.(string)
+		if !kOk {
+			break
+		}
+
+		e[name] = v
+		i += 2
+	}
+	return ExtendMap(e)
+}
+
+func ExtendMap(e map[string]interface{}) expr.Option {
+	return func(c *conf.Config) {
+		var env map[string]interface{}
+		var ok bool
+		if c.Env == nil {
+			env = make(map[string]interface{})
+		} else {
+			if env, ok = c.Env.(map[string]interface{}); !ok {
+				panic("only map expr environment is supported")
+			}
+		}
+		for k, v := range e {
+			if _, ok := env[k]; !ok {
+				env[k] = v
+			}
+		}
+		c.Strict = true
+		c.MapEnv = true
+		c.Env = env
+		c.Types = conf.CreateTypesTable(c.Env)
+	}
+}
diff --git a/pkg/expr/context.go b/pkg/expr/context.go
new file mode 100644
index 0000000000000000000000000000000000000000..4049d96f5f62a94219b247b09a4337b474112224
--- /dev/null
+++ b/pkg/expr/context.go
@@ -0,0 +1,56 @@
+package expr
+
+import "context"
+
+type ctxKey struct{}
+
+type exprCtx struct {
+	Env map[string]interface{}
+}
+
+func getContext(ctx context.Context) (context.Context, *exprCtx) {
+	if ctx != nil {
+		if c, _ := ctx.Value(ctxKey{}).(*exprCtx); c != nil {
+			return ctx, c
+		}
+	} else {
+		ctx = context.Background()
+	}
+
+	c := &exprCtx{}
+	ctx = context.WithValue(ctx, ctxKey{}, c)
+	return ctx, c
+}
+
+func WithEnv(ctx context.Context, env map[string]interface{}) context.Context {
+	ctx, c := getContext(ctx)
+
+	if c.Env == nil {
+		c.Env = make(map[string]interface{})
+	}
+
+	for k, v := range env {
+		c.Env[k] = v
+	}
+
+	return ctx
+}
+
+func WithEnvKV(ctx context.Context, kv ...interface{}) context.Context {
+	m := make(map[string]interface{})
+
+	for i := 0; i < len(kv)/2; i++ {
+		key, ok := kv[i].(string)
+		if !ok {
+			return nil
+		}
+		m[key] = kv[i+1]
+	}
+
+	return WithEnv(ctx, m)
+}
+
+func GetEnv(ctx context.Context) map[string]interface{} {
+	ctx, c := getContext(ctx)
+	return c.Env
+}
diff --git a/pkg/expr/exp.go b/pkg/expr/exp.go
new file mode 100644
index 0000000000000000000000000000000000000000..e34b00b8e521dd9c915ee0bed9a6d62e1ac98aee
--- /dev/null
+++ b/pkg/expr/exp.go
@@ -0,0 +1,65 @@
+package expr
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+func EqualString(f, s string) string {
+	return fmt.Sprintf("%s == '%s'", f, s)
+}
+
+func NotEqualString(f, s string) string {
+	return fmt.Sprintf("%s != '%s'", f, s)
+}
+
+func EqualNumber(f string, n int) string {
+	return fmt.Sprintf("%s == %d", f, n)
+}
+
+func NotEqualNumber(f string, n int) string {
+	return fmt.Sprintf("%s != %d", f, n)
+}
+
+func LessOrEqualNumber(f string, n int) string {
+	return fmt.Sprintf("%s <= %d", f, n)
+}
+
+func InStringArray(s string, arr []string) string {
+	arrStr := "'" + strings.Join(arr, "','") + "'"
+	return fmt.Sprintf("%s in [%s]", s, arrStr)
+}
+
+func NotInStringArray(s string, arr []string) string {
+	arrStr := "'" + strings.Join(arr, "','") + "'"
+	return fmt.Sprintf("%s not in [%s]", s, arrStr)
+}
+
+func And(ss ...string) string {
+	return strings.Join(ss, " && ")
+}
+
+func Or(ss ...string) string {
+	return strings.Join(ss, " || ")
+}
+
+func Not(s string) string {
+	return "!" + s
+}
+
+func After(f string, t time.Time) string {
+	return fmt.Sprintf("%s > Time.Time('%s')", f, t.Format(time.RFC3339))
+}
+
+func AfterOrEqual(f string, t time.Time) string {
+	return fmt.Sprintf("%s >= Time.Time('%s')", f, t.Format(time.RFC3339))
+}
+
+func Before(f string, t time.Time) string {
+	return fmt.Sprintf("%s < Time.Time('%s')", f, t.Format(time.RFC3339))
+}
+
+func BeforeOrEqual(f string, t time.Time) string {
+	return fmt.Sprintf("%s <= Time.Time('%s')", f, t.Format(time.RFC3339))
+}
diff --git a/pkg/expr/expr.go b/pkg/expr/expr.go
new file mode 100644
index 0000000000000000000000000000000000000000..9c788e71e108e85b483ec71a8700b7fc3bb046be
--- /dev/null
+++ b/pkg/expr/expr.go
@@ -0,0 +1,58 @@
+package expr
+
+import (
+	compiler2 "github.com/antonmedv/expr/compiler"
+	"github.com/antonmedv/expr/parser"
+	"github.com/antonmedv/expr/vm"
+	"golang.org/x/net/context"
+)
+
+const EnvContextKey = "$context"
+
+func Eval(ctx context.Context, input string, env map[string]interface{}) (interface{}, error) {
+	tree, err := parser.Parse(input)
+	if err != nil {
+		return nil, err
+	}
+
+	e := GetEnv(ctx)
+
+	if e == nil {
+		e = make(map[string]interface{})
+	}
+
+	for k, v := range env {
+		e[k] = v
+	}
+
+	e[EnvContextKey] = ctx
+	cfg := GetDefaultConfig(e)
+
+	env, _ = cfg.Env.(map[string]interface{})
+
+	program, err := compiler2.Compile(tree, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	output, err := vm.Run(program, env)
+	if err != nil {
+		return nil, err
+	}
+
+	return output, nil
+}
+
+func EvalKV(ctx context.Context, input string, kv ...interface{}) (interface{}, error) {
+	m := make(map[string]interface{})
+
+	for i := 0; i < len(kv)/2; i++ {
+		key, ok := kv[i].(string)
+		if !ok {
+			panic("key should be string")
+		}
+		m[key] = kv[i+1]
+	}
+
+	return Eval(ctx, input, m)
+}
diff --git a/pkg/expr/format.go b/pkg/expr/format.go
new file mode 100644
index 0000000000000000000000000000000000000000..730388d2d1e654549f8dae00332c6958efb26a65
--- /dev/null
+++ b/pkg/expr/format.go
@@ -0,0 +1,91 @@
+package expr
+
+import (
+	"fmt"
+	"path"
+	"regexp"
+	"strings"
+	"time"
+
+	"git.perx.ru/perxis/perxis-go/pkg/id"
+	"github.com/gosimple/slug"
+)
+
+var markersRE = regexp.MustCompile(`{\w+}`)
+
+func init() {
+	RegisterOption(
+		Extend(
+			"sprintf", Sprintf,
+			"trim_space", TrimSpace,
+			"to_upper", ToUpper,
+			"slugify", Slugify,
+			"make_path", MakePath,
+			"normalize_string", func(s string) string {
+				s = strings.TrimSpace(strings.ToLower(s))
+				s = strings.ReplaceAll(s, " ", "_")
+				s = strings.ReplaceAll(s, ".", "_")
+				s = strings.ReplaceAll(s, "/", "_")
+				return strings.ToValidUTF8(s, "")
+			},
+			"replace_markers", ReplaceMarkers,
+		),
+	)
+}
+
+func Slugify(value interface{}) string {
+	if s, ok := value.(string); ok {
+		return slug.Make(s)
+	}
+	return ""
+}
+
+func MakePath(base, url interface{}) string {
+	b, p := "/", ""
+	if s, ok := base.(string); ok && s != "" {
+		b = s
+	}
+
+	if s, ok := url.(string); ok {
+		p = s
+	}
+
+	return path.Join(b, p)
+}
+
+func ToUpper(value interface{}) string {
+	if s, ok := value.(string); ok {
+		return strings.ToUpper(s)
+	}
+	return ""
+}
+
+func TrimSpace(value interface{}) string {
+	if s, ok := value.(string); ok {
+		return strings.TrimSpace(s)
+	}
+	return ""
+}
+
+func Sprintf(format interface{}, a ...interface{}) string {
+	if f, ok := format.(string); ok {
+		return fmt.Sprintf(f, a...)
+	}
+	return ""
+}
+
+func ReplaceMarkers(value interface{}) string {
+	if s, ok := value.(string); ok {
+		s = markersRE.ReplaceAllStringFunc(s, func(m string) string {
+			switch {
+			case m == "{new_id}":
+				return id.GenerateNewID()
+			case m == "{now}":
+				return time.Now().Format(time.RFC3339)
+			}
+			return m
+		})
+		return s
+	}
+	return ""
+}
diff --git a/pkg/expr/format_test.go b/pkg/expr/format_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..7a0ba4c67e899c058372ca65e050f58e83ec0073
--- /dev/null
+++ b/pkg/expr/format_test.go
@@ -0,0 +1,45 @@
+package expr
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/net/context"
+)
+
+func TestFormat(t *testing.T) {
+	ctx := context.Background()
+
+	tests := []struct {
+		name  string
+		eval  string
+		env   map[string]interface{}
+		wantB interface{}
+	}{
+		{"sprintf#1", "sprintf(s1, s2)", map[string]interface{}{"s1": "hello %s", "s2": "world"}, "hello world"},
+		{"sprintf#2", "sprintf(s1, s2)", map[string]interface{}{"s1": nil, "s2": nil}, ""},
+		{"sprintf#3", "sprintf(s1, s2)", map[string]interface{}{"s1": "hello %s", "s2": nil}, "hello %!s(<nil>)"},
+		{"to_upper#1", "to_upper(s1)", map[string]interface{}{"s1": "hello"}, "HELLO"},
+		{"to_upper#2", "to_upper(s1)", map[string]interface{}{"s1": nil}, ""},
+		{"trim_space#1", "trim_space(s1)", map[string]interface{}{"s1": " hel lo  wor ld  "}, "hel lo  wor ld"},
+		{"trim_space#2", "trim_space(s1)", map[string]interface{}{"s1": nil}, ""},
+		{"slugify#1", "slugify(s1)", map[string]interface{}{"s1": " hello  world "}, "hello-world"},
+		{"slugify#2", "slugify(s1)", map[string]interface{}{"s1": " привет  мир "}, "privet-mir"},
+		{"slugify#3", "slugify(s1)", map[string]interface{}{"s1": "privet-mir"}, "privet-mir"},
+		{"slugify#4", "slugify(s1)", nil, ""},
+		{"make_path#1", "make_path(s1, s2)", map[string]interface{}{"s1": "/pages", "s2": "page-1"}, "/pages/page-1"},
+		{"make_path#2", "make_path(s1, s2)", map[string]interface{}{"s1": "/pages", "s2": ""}, "/pages"},
+		{"make_path#3", "make_path(s1, s2)", map[string]interface{}{"s1": "", "s2": "pages"}, "/pages"},
+		{"make_path#4", "make_path(s1, s2)", map[string]interface{}{"s1": "", "s2": ""}, "/"},
+		{"make_path#4", "make_path(s1, s2)", nil, "/"},
+		{"make_path#5", "make_path(s1, slugify(s2))", map[string]interface{}{"s1": "/pages", "s2": " привет  мир "}, "/pages/privet-mir"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotB, err := Eval(ctx, tt.eval, tt.env)
+			require.NoError(t, err)
+			assert.Equal(t, tt.wantB, gotB)
+		})
+	}
+}
diff --git a/pkg/expr/mongo.go b/pkg/expr/mongo.go
new file mode 100644
index 0000000000000000000000000000000000000000..02075dc49aad8ebc8cacd5fe62015bd1be9e28fa
--- /dev/null
+++ b/pkg/expr/mongo.go
@@ -0,0 +1,665 @@
+package expr
+
+import (
+	"context"
+	"fmt"
+	"regexp"
+	"strings"
+
+	"github.com/antonmedv/expr"
+	"github.com/antonmedv/expr/ast"
+	compiler2 "github.com/antonmedv/expr/compiler"
+	"github.com/antonmedv/expr/conf"
+	"github.com/antonmedv/expr/parser"
+	"go.mongodb.org/mongo-driver/bson"
+)
+
+var geoTypes = map[string]string{
+	"box":     "$box",
+	"polygon": "$polygon",
+}
+
+func ConvertToMongo(ctx context.Context, exp string, env map[string]interface{}, identifierRenameFn func(string) string, ops ...expr.Option) (b bson.M, err error) {
+	if exp == "" {
+		return bson.M{}, nil
+	}
+	tree, err := parser.Parse(exp)
+	if err != nil {
+		return nil, err
+	}
+	return convertToMongo(ctx, tree, env, identifierRenameFn, ops...)
+}
+
+func convertToMongo(ctx context.Context, tree *parser.Tree, env map[string]interface{}, identifierRenameFn func(string) string, ops ...expr.Option) (b bson.M, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			err = fmt.Errorf("%v", r)
+		}
+	}()
+
+	if env == nil {
+		env = make(map[string]interface{})
+	}
+
+	env[EnvContextKey] = ctx
+	config := GetDefaultConfig(env)
+
+	for _, op := range ops {
+		op(config)
+	}
+
+	env = config.Env.(map[string]interface{})
+
+	if len(config.Visitors) >= 0 {
+		for _, v := range config.Visitors {
+			ast.Walk(&tree.Node, v)
+		}
+	}
+
+	c := &compiler{tree: tree, env: env, config: config, identifierRenameFn: identifierRenameFn}
+	v := c.compile(tree.Node)
+	switch e := v.(type) {
+	case bson.M:
+		b = e
+	case string:
+		b = bson.M{"$text": bson.M{"$search": e}}
+	default:
+		err = fmt.Errorf("invalid expression")
+	}
+	return
+}
+
+type compiler struct {
+	env                map[string]interface{}
+	tree               *parser.Tree
+	config             *conf.Config
+	identifierRenameFn func(string) string
+}
+
+func (c *compiler) eval(node ast.Node) interface{} {
+	t := &parser.Tree{
+		Node:   node,
+		Source: c.tree.Source,
+	}
+	prg, err := compiler2.Compile(t, c.config)
+	if err != nil {
+		panic(fmt.Sprintf("compile error %s", err.Error()))
+	}
+	ret, err := expr.Run(prg, c.env)
+	if err != nil {
+		panic(fmt.Sprintf("execution error %s", err.Error()))
+	}
+	return ret
+}
+
+func (c *compiler) compile(node ast.Node) interface{} {
+	switch n := node.(type) {
+	case *ast.NilNode:
+		return c.NilNode(n)
+	case *ast.IdentifierNode:
+		return c.IdentifierNode(n)
+	case *ast.IntegerNode:
+		return c.IntegerNode(n)
+	case *ast.FloatNode:
+		return c.FloatNode(n)
+	case *ast.BoolNode:
+		return c.BoolNode(n)
+	case *ast.StringNode:
+		return c.StringNode(n)
+	case *ast.ConstantNode:
+		return c.ConstantNode(n)
+	case *ast.UnaryNode:
+		return c.UnaryNode(n)
+	case *ast.BinaryNode:
+		return c.BinaryNode(n)
+	case *ast.MatchesNode:
+		return c.MatchesNode(n)
+	case *ast.PropertyNode:
+		return c.PropertyNode(n)
+	case *ast.IndexNode:
+		return c.IndexNode(n)
+	case *ast.SliceNode:
+		return c.SliceNode(n)
+	case *ast.MethodNode:
+		return c.MethodNode(n)
+	case *ast.FunctionNode:
+		return c.FunctionNode(n)
+	case *ast.BuiltinNode:
+		return c.BuiltinNode(n)
+	case *ast.ClosureNode:
+		return c.ClosureNode(n)
+	case *ast.PointerNode:
+		return c.PointerNode(n)
+	case *ast.ConditionalNode:
+		return c.ConditionalNode(n)
+	case *ast.ArrayNode:
+		return c.ArrayNode(n)
+	case *ast.MapNode:
+		return c.MapNode(n)
+	case *ast.PairNode:
+		return c.PairNode(n)
+	default:
+		panic(fmt.Sprintf("undefined node type (%T)", node))
+	}
+}
+
+func (c *compiler) NilNode(node *ast.NilNode) interface{} {
+	return nil
+}
+
+func (c *compiler) IdentifierNode(node *ast.IdentifierNode) string {
+	identifier := node.Value
+	if c.identifierRenameFn != nil {
+		identifier = c.identifierRenameFn(identifier)
+	}
+	return identifier
+}
+
+func (c *compiler) IntegerNode(node *ast.IntegerNode) int {
+	return node.Value
+	//t := node.Type()
+	//if t == nil {
+	//	c.emitPush(node.Value)
+	//	return
+	//}
+	//
+	//switch t.Kind() {
+	//case reflect.Float32:
+	//	c.emitPush(float32(node.Value))
+	//case reflect.Float64:
+	//	c.emitPush(float64(node.Value))
+	//
+	//case reflect.Int:
+	//	c.emitPush(int(node.Value))
+	//case reflect.Int8:
+	//	c.emitPush(int8(node.Value))
+	//case reflect.Int16:
+	//	c.emitPush(int16(node.Value))
+	//case reflect.Int32:
+	//	c.emitPush(int32(node.Value))
+	//case reflect.Int64:
+	//	c.emitPush(int64(node.Value))
+	//
+	//case reflect.Uint:
+	//	c.emitPush(uint(node.Value))
+	//case reflect.Uint8:
+	//	c.emitPush(uint8(node.Value))
+	//case reflect.Uint16:
+	//	c.emitPush(uint16(node.Value))
+	//case reflect.Uint32:
+	//	c.emitPush(uint32(node.Value))
+	//case reflect.Uint64:
+	//	c.emitPush(uint64(node.Value))
+	//
+	//default:
+	//	c.emitPush(node.Value)
+	//}
+}
+
+func (c *compiler) FloatNode(node *ast.FloatNode) float64 {
+	return node.Value
+}
+
+func (c *compiler) BoolNode(node *ast.BoolNode) bool {
+	return node.Value
+}
+
+func (c *compiler) StringNode(node *ast.StringNode) string {
+	return node.Value
+}
+
+func (c *compiler) ConstantNode(node *ast.ConstantNode) interface{} {
+	return node.Value
+}
+
+func (c *compiler) UnaryNode(node *ast.UnaryNode) interface{} {
+	op := c.compile(node.Node)
+
+	switch node.Operator {
+
+	case "!", "not":
+		return bson.M{"$not": op}
+	default:
+		panic(fmt.Sprintf("unknown operator (%v)", node.Operator))
+	}
+}
+
+func (c *compiler) identifier(node ast.Node) string {
+	switch l := node.(type) {
+	case *ast.PropertyNode:
+		return c.PropertyNode(l)
+	case *ast.IdentifierNode:
+		return c.IdentifierNode(l)
+	}
+	panic(fmt.Sprintf("incorrect identifier node (%v) ", ast.Dump(node)))
+}
+
+func (c *compiler) BinaryNode(node *ast.BinaryNode) interface{} {
+	switch node.Operator {
+	case "==":
+		return bson.M{c.identifier(node.Left): c.eval(node.Right)}
+
+	case "!=":
+		return bson.M{c.identifier(node.Left): bson.M{"$ne": c.eval(node.Right)}}
+
+	case "or", "||":
+		return bson.M{"$or": bson.A{c.compile(node.Left), c.compile(node.Right)}}
+
+	case "and", "&&":
+		return bson.M{"$and": bson.A{c.compile(node.Left), c.compile(node.Right)}}
+
+	case "in":
+		return bson.M{c.identifier(node.Left): bson.M{"$in": c.eval(node.Right)}}
+
+	case "not in":
+		return bson.M{c.identifier(node.Left): bson.M{"$nin": c.eval(node.Right)}}
+
+	case "<":
+		return bson.M{c.identifier(node.Left): bson.M{"$lt": c.eval(node.Right)}}
+
+	case ">":
+		return bson.M{c.identifier(node.Left): bson.M{"$gt": c.eval(node.Right)}}
+
+	case "<=":
+		return bson.M{c.identifier(node.Left): bson.M{"$lte": c.eval(node.Right)}}
+
+	case ">=":
+		return bson.M{c.identifier(node.Left): bson.M{"$gte": c.eval(node.Right)}}
+
+	//case "+":
+	//	c.compile(node.Left)
+	//	c.compile(node.Right)
+	//	c.emit(OpAdd)
+	//
+	//case "-":
+	//	c.compile(node.Left)
+	//	c.compile(node.Right)
+	//	c.emit(OpSubtract)
+	//
+	//case "*":
+	//	c.compile(node.Left)
+	//	c.compile(node.Right)
+	//	c.emit(OpMultiply)
+	//
+	//case "/":
+	//	c.compile(node.Left)
+	//	c.compile(node.Right)
+	//	c.emit(OpDivide)
+	//
+	//case "%":
+	//	c.compile(node.Left)
+	//	c.compile(node.Right)
+	//	c.emit(OpModulo)
+	//
+	//case "**":
+	//	c.compile(node.Left)
+	//	c.compile(node.Right)
+	//	c.emit(OpExponent)
+
+	case "contains":
+		value, ok := c.eval(node.Right).(string)
+		if !ok {
+			panic("contains requires string as an argument")
+		}
+
+		return bson.M{c.identifier(node.Left): bson.M{"$regex": regexp.QuoteMeta(value)}}
+
+	case "startsWith":
+		value, ok := c.eval(node.Right).(string)
+		if !ok {
+			panic("startsWith requires string as an argument")
+		}
+
+		return bson.M{c.identifier(node.Left): bson.M{"$regex": fmt.Sprintf("^%s.*", regexp.QuoteMeta(value))}}
+
+	case "endsWith":
+		value, ok := c.eval(node.Right).(string)
+		if !ok {
+			panic("endsWith requires string as an argument")
+		}
+
+		return bson.M{c.identifier(node.Left): bson.M{"$regex": fmt.Sprintf(".*%s$", regexp.QuoteMeta(value))}}
+
+	case "..":
+		panic("unsupported range")
+
+	default:
+		panic(fmt.Sprintf("unknown operator (%v)", node.Operator))
+
+	}
+}
+
+func (c *compiler) MatchesNode(node *ast.MatchesNode) interface{} {
+	panic("unsupported match node")
+	//if node.Regexp != nil {
+	//	c.compile(node.Left)
+	//	c.emit(OpMatchesConst, c.makeConstant(node.Regexp)...)
+	//	return
+	//}
+	//c.compile(node.Left)
+	//c.compile(node.Right)
+	//c.emit(OpMatches)
+}
+
+func (c *compiler) PropertyNode(node *ast.PropertyNode) string {
+	v := c.compile(node.Node)
+	if val, ok := v.(string); ok {
+		return fmt.Sprintf("%s.%s", val, node.Property)
+	}
+	panic(fmt.Sprintf("unsupported property for %v", ast.Dump(node.Node)))
+}
+
+func (c *compiler) IndexNode(node *ast.IndexNode) string {
+	return fmt.Sprintf("{index-%v}", c.compile(node.Index))
+}
+
+func (c *compiler) SliceNode(node *ast.SliceNode) interface{} {
+	panic("unsupported slice node")
+}
+
+func (c *compiler) MethodNode(node *ast.MethodNode) interface{} {
+	panic("unsupported method node")
+	//c.compile(node.Node)
+	//for _, arg := range node.Arguments {
+	//	c.compile(arg)
+	//}
+	//c.emit(OpMethod, c.makeConstant(Call{Name: node.Method, Size: len(node.Arguments)})...)
+}
+
+func (c *compiler) FunctionNode(node *ast.FunctionNode) interface{} {
+	switch node.Name {
+	case "search", "q":
+		val := c.compile(node.Arguments[0])
+		return bson.M{"$text": bson.M{"$search": val}}
+	case "near":
+		v := c.identifier(node.Arguments[0])
+		point := c.eval(node.Arguments[1])
+		distance := c.eval(node.Arguments[2])
+
+		if v == "" {
+			panic("incorrect argument, empty field name")
+		}
+		if !strings.HasSuffix(v, ".geometry") {
+			v += ".geometry"
+		}
+
+		if _, ok := point.([]interface{}); !ok {
+			panic("incorrect argument, point must coordinates array")
+		}
+
+		return bson.M{
+			v: bson.M{"$near": bson.D{{"$geometry", map[string]interface{}{"type": "Point", "coordinates": point}}, {"$maxDistance", distance}}},
+		}
+	case "within":
+		v := c.identifier(node.Arguments[0])
+		t := c.eval(node.Arguments[1])
+		points := c.eval(node.Arguments[2])
+
+		if v == "" {
+			panic("incorrect argument, empty field name")
+		}
+
+		if !strings.HasSuffix(v, ".geometry") {
+			v += ".geometry"
+		}
+
+		typ, ok := t.(string)
+		if !ok {
+			panic("incorrect argument, geotype must be string")
+		}
+		typ, ok = geoTypes[typ]
+		if !ok {
+			panic("incorrect geotype value")
+		}
+
+		if _, ok := points.([]interface{}); !ok {
+			panic("incorrect argument, points must be array of coordinates")
+		}
+
+		return bson.M{
+			v: bson.M{"$geoWithin": bson.M{typ: points}},
+		}
+	case "In":
+		fields := c.identifier(node.Arguments[0])
+		if fields == "" {
+			panic("incorrect argument, empty field name")
+		}
+		array, ok := c.eval(node.Arguments[1]).([]interface{})
+		if !ok {
+			array = []interface{}{c.eval(node.Arguments[1])}
+		}
+
+		return bson.M{fields: bson.M{"$in": array}}
+
+	case "icontains":
+		v := c.identifier(node.Arguments[0])
+		t, ok := c.eval(node.Arguments[1]).(string)
+		if !ok {
+			panic("icontains requires string as an argument")
+		}
+		return bson.M{v: bson.M{"$regex": regexp.QuoteMeta(t), "$options": "i"}}
+
+	case "istartsWith":
+		v := c.identifier(node.Arguments[0])
+		t, ok := c.eval(node.Arguments[1]).(string)
+		if !ok {
+			panic("istartsWith requires string as an argument")
+		}
+		return bson.M{v: bson.M{"$regex": fmt.Sprintf("^%s.*", regexp.QuoteMeta(t)), "$options": "i"}}
+
+	case "iendsWith":
+		v := c.identifier(node.Arguments[0])
+		t, ok := c.eval(node.Arguments[1]).(string)
+		if !ok {
+			panic("iendsWith requires string as an argument")
+		}
+		return bson.M{v: bson.M{"$regex": fmt.Sprintf(".*%s$", regexp.QuoteMeta(t)), "$options": "i"}}
+	}
+	panic("unsupported function")
+	//for _, arg := range node.Arguments {
+	//	c.compile(arg)
+	//}
+	//op := OpCall
+	//if node.Fast {
+	//	op = OpCallFast
+	//}
+	//c.emit(op, c.makeConstant(Call{Name: node.Name, Size: len(node.Arguments)})...)
+}
+
+func (c *compiler) BuiltinNode(node *ast.BuiltinNode) interface{} {
+	panic("unsupported builin node")
+	//switch node.Name {
+	//case "len":
+	//	c.compile(node.Arguments[0])
+	//	c.emit(OpLen)
+	//	c.emit(OpRot)
+	//	c.emit(OpPop)
+	//
+	//case "all":
+	//	c.compile(node.Arguments[0])
+	//	c.emit(OpBegin)
+	//	var loopBreak int
+	//	c.emitLoop(func() {
+	//		c.compile(node.Arguments[1])
+	//		loopBreak = c.emit(OpJumpIfFalse, c.placeholder()...)
+	//		c.emit(OpPop)
+	//	})
+	//	c.emit(OpTrue)
+	//	c.patchJump(loopBreak)
+	//	c.emit(OpEnd)
+	//
+	//case "none":
+	//	c.compile(node.Arguments[0])
+	//	c.emit(OpBegin)
+	//	var loopBreak int
+	//	c.emitLoop(func() {
+	//		c.compile(node.Arguments[1])
+	//		c.emit(OpNot)
+	//		loopBreak = c.emit(OpJumpIfFalse, c.placeholder()...)
+	//		c.emit(OpPop)
+	//	})
+	//	c.emit(OpTrue)
+	//	c.patchJump(loopBreak)
+	//	c.emit(OpEnd)
+	//
+	//case "any":
+	//	c.compile(node.Arguments[0])
+	//	c.emit(OpBegin)
+	//	var loopBreak int
+	//	c.emitLoop(func() {
+	//		c.compile(node.Arguments[1])
+	//		loopBreak = c.emit(OpJumpIfTrue, c.placeholder()...)
+	//		c.emit(OpPop)
+	//	})
+	//	c.emit(OpFalse)
+	//	c.patchJump(loopBreak)
+	//	c.emit(OpEnd)
+	//
+	//case "one":
+	//	count := c.makeConstant("count")
+	//	c.compile(node.Arguments[0])
+	//	c.emit(OpBegin)
+	//	c.emitPush(0)
+	//	c.emit(OpStore, count...)
+	//	c.emitLoop(func() {
+	//		c.compile(node.Arguments[1])
+	//		c.emitCond(func() {
+	//			c.emit(OpInc, count...)
+	//		})
+	//	})
+	//	c.emit(OpLoad, count...)
+	//	c.emitPush(1)
+	//	c.emit(OpEqual)
+	//	c.emit(OpEnd)
+	//
+	//case "filter":
+	//	count := c.makeConstant("count")
+	//	c.compile(node.Arguments[0])
+	//	c.emit(OpBegin)
+	//	c.emitPush(0)
+	//	c.emit(OpStore, count...)
+	//	c.emitLoop(func() {
+	//		c.compile(node.Arguments[1])
+	//		c.emitCond(func() {
+	//			c.emit(OpInc, count...)
+	//
+	//			c.emit(OpLoad, c.makeConstant("array")...)
+	//			c.emit(OpLoad, c.makeConstant("i")...)
+	//			c.emit(OpIndex)
+	//		})
+	//	})
+	//	c.emit(OpLoad, count...)
+	//	c.emit(OpEnd)
+	//	c.emit(OpArray)
+	//
+	//case "map":
+	//	c.compile(node.Arguments[0])
+	//	c.emit(OpBegin)
+	//	size := c.emitLoop(func() {
+	//		c.compile(node.Arguments[1])
+	//	})
+	//	c.emit(OpLoad, size...)
+	//	c.emit(OpEnd)
+	//	c.emit(OpArray)
+	//
+	//case "count":
+	//	count := c.makeConstant("count")
+	//	c.compile(node.Arguments[0])
+	//	c.emit(OpBegin)
+	//	c.emitPush(0)
+	//	c.emit(OpStore, count...)
+	//	c.emitLoop(func() {
+	//		c.compile(node.Arguments[1])
+	//		c.emitCond(func() {
+	//			c.emit(OpInc, count...)
+	//		})
+	//	})
+	//	c.emit(OpLoad, count...)
+	//	c.emit(OpEnd)
+	//
+	//default:
+	//	panic(fmt.Sprintf("unknown builtin %v", node.Name))
+	//}
+}
+
+//func (c *compiler) emitLoop(body func()) []byte {
+//	i := c.makeConstant("i")
+//	size := c.makeConstant("size")
+//	array := c.makeConstant("array")
+//
+//	c.emit(OpLen)
+//	c.emit(OpStore, size...)
+//	c.emit(OpStore, array...)
+//	c.emitPush(0)
+//	c.emit(OpStore, i...)
+//
+//	cond := len(c.bytecode)
+//	c.emit(OpLoad, i...)
+//	c.emit(OpLoad, size...)
+//	c.emit(OpLess)
+//	end := c.emit(OpJumpIfFalse, c.placeholder()...)
+//	c.emit(OpPop)
+//
+//	body()
+//
+//	c.emit(OpInc, i...)
+//	c.emit(OpJumpBackward, c.calcBackwardJump(cond)...)
+//
+//	c.patchJump(end)
+//	c.emit(OpPop)
+//
+//	return size
+//}
+
+func (c *compiler) ClosureNode(node *ast.ClosureNode) interface{} {
+	return c.compile(node.Node)
+}
+
+func (c *compiler) PointerNode(node *ast.PointerNode) interface{} {
+	panic("unsupported pointer node")
+	//c.emit(OpLoad, c.makeConstant("array")...)
+	//c.emit(OpLoad, c.makeConstant("i")...)
+	//c.emit(OpIndex)
+}
+
+func (c *compiler) ConditionalNode(node *ast.ConditionalNode) interface{} {
+	panic("unsupported conditional node")
+	//c.compile(node.Cond)
+	//otherwise := c.emit(OpJumpIfFalse, c.placeholder()...)
+	//
+	//c.emit(OpPop)
+	//c.compile(node.Exp1)
+	//end := c.emit(OpJump, c.placeholder()...)
+	//
+	//c.patchJump(otherwise)
+	//c.emit(OpPop)
+	//c.compile(node.Exp2)
+	//
+	//c.patchJump(end)
+}
+
+func (c *compiler) ArrayNode(node *ast.ArrayNode) interface{} {
+	panic("unsupported array node")
+	//for _, node := range node.Nodes {
+	//	c.compile(node)
+	//}
+	//
+	//c.emitPush(len(node.Nodes))
+	//c.emit(OpArray)
+}
+
+func (c *compiler) MapNode(node *ast.MapNode) interface{} {
+	panic("unsupported map node")
+	//for _, pair := range node.Pairs {
+	//	c.compile(pair)
+	//}
+	//
+	//c.emitPush(len(node.Pairs))
+	//c.emit(OpMap)
+}
+
+func (c *compiler) PairNode(node *ast.PairNode) interface{} {
+	panic("unsupported pair node")
+	//c.compile(node.Key)
+	//c.compile(node.Value)
+}
diff --git a/pkg/expr/mongo_test.go b/pkg/expr/mongo_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..26526945bc72d366aa5da64ea4c5e518e558d164
--- /dev/null
+++ b/pkg/expr/mongo_test.go
@@ -0,0 +1,86 @@
+package expr
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"git.perx.ru/perxis/perxis-go/pkg/id"
+	"github.com/antonmedv/expr"
+	"github.com/antonmedv/expr/ast"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.mongodb.org/mongo-driver/bson"
+	"golang.org/x/net/context"
+)
+
+func TestConvertToMongo(t *testing.T) {
+	now := time.Now()
+	dt, _ := time.Parse("2006-01-02", "2021-08-31")
+	tm, _ := time.Parse(time.RFC3339, now.Format(time.RFC3339))
+	ctx := context.Background()
+
+	tests := []struct {
+		name    string
+		eval    string
+		env     map[string]interface{}
+		wantB   bson.M
+		wantErr bool
+	}{
+		{"equal", "s == 3", nil, bson.M{"s": 3}, false},
+		{"in array", "s in [1,2,3]", nil, bson.M{"s": bson.M{"$in": []interface{}{1, 2, 3}}}, false},
+		{"contains", "s contains 'some'", nil, bson.M{"s": bson.M{"$regex": "some"}}, false},
+		{"contains with . + () $ {} ^", "value contains 'something with . + () $ {} ^'", nil, bson.M{"value": bson.M{"$regex": "something with \\. \\+ \\(\\) \\$ \\{\\} \\^"}}, false},
+		{"startsWith", "s startsWith 'some'", nil, bson.M{"s": bson.M{"$regex": "^some.*"}}, false},
+		{"startsWith . + () $ {} ^", "s startsWith '. + () $ {} ^'", nil, bson.M{"s": bson.M{"$regex": "^\\. \\+ \\(\\) \\$ \\{\\} \\^.*"}}, false},
+		{"endsWith", "s endsWith 'some'", nil, bson.M{"s": bson.M{"$regex": ".*some$"}}, false},
+		{"endsWith . + () $ {} ^", "s endsWith '. + () $ {} ^'", nil, bson.M{"s": bson.M{"$regex": ".*\\. \\+ \\(\\) \\$ \\{\\} \\^$"}}, false},
+		{"icontains", "icontains(s, 'some')", nil, bson.M{"s": bson.M{"$regex": "some", "$options": "i"}}, false},
+		{"icontains with . + () $ {} ^", "icontains (value, 'something with . + () $ {} ^')", nil, bson.M{"value": bson.M{"$regex": "something with \\. \\+ \\(\\) \\$ \\{\\} \\^", "$options": "i"}}, false},
+		{"istartsWith", "istartsWith(s, 'Some')", nil, bson.M{"s": bson.M{"$regex": "^Some.*", "$options": "i"}}, false},
+		{"istartsWith . + () $ {} ^ . + () $ {} ^", "istartsWith(s, '. + () $ {} ^')", nil, bson.M{"s": bson.M{"$regex": "^\\. \\+ \\(\\) \\$ \\{\\} \\^.*", "$options": "i"}}, false},
+		{"iendsWith", "iendsWith(s, 'some')", nil, bson.M{"s": bson.M{"$regex": ".*some$", "$options": "i"}}, false},
+		{"iendsWith . + () $ {} ^", "iendsWith(s,'. + () $ {} ^')", nil, bson.M{"s": bson.M{"$regex": ".*\\. \\+ \\(\\) \\$ \\{\\} \\^$", "$options": "i"}}, false},
+		{"or", "s==2 || s > 10", nil, bson.M{"$or": bson.A{bson.M{"s": 2}, bson.M{"s": bson.M{"$gt": 10}}}}, false},
+		{"search", "search('some') || s > 10", nil, bson.M{"$or": bson.A{bson.M{"$text": bson.M{"$search": "some"}}, bson.M{"s": bson.M{"$gt": 10}}}}, false},
+		{"vars:or", "s== a + 2 || s > a + 10", map[string]interface{}{"a": 100}, bson.M{"$or": bson.A{bson.M{"s": 102}, bson.M{"s": bson.M{"$gt": 110}}}}, false},
+		{"near", "near(a, [55.5, 37.5], 1000)", map[string]interface{}{"a": []interface{}{55, 37}}, bson.M{"a.geometry": bson.M{"$near": bson.D{{"$geometry", map[string]interface{}{"coordinates": []interface{}{55.5, 37.5}, "type": "Point"}}, {"$maxDistance", 1000}}}}, false},
+		{"within", "within(a, 'box', [[54.54, 36.36], [55.55, 37.37]])", map[string]interface{}{"a": []interface{}{55, 37}}, bson.M{"a.geometry": bson.M{"$geoWithin": bson.M{"$box": []interface{}{[]interface{}{54.54, 36.36}, []interface{}{55.55, 37.37}}}}}, false},
+		{"time", "d > Time.Date('2021-08-31')", nil, bson.M{"d": bson.M{"$gt": dt}}, false},
+		{"time", fmt.Sprintf("d > Time.Time('%s')", now.Format(time.RFC3339)), nil, bson.M{"d": bson.M{"$gt": tm}}, false},
+		{"in", "In(s, [1,2,3])", nil, bson.M{"s": bson.M{"$in": []interface{}{1, 2, 3}}}, false},
+		{"in", "In(s, 1)", nil, bson.M{"s": bson.M{"$in": []interface{}{1}}}, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotB, err := ConvertToMongo(ctx, tt.eval, tt.env, nil)
+			require.NoError(t, err)
+			assert.Equal(t, tt.wantB, gotB)
+		})
+	}
+}
+
+func BenchmarkConvertToMongo(b *testing.B) {
+	const idsNum = 1_000_000
+	ctx := context.Background()
+
+	ids := make([]string, idsNum)
+	for i := 0; i < idsNum; i++ {
+		ids[i] = id.GenerateNewID()
+	}
+	exp := InStringArray("id", ids)
+	//fmt.Println(len(exp))
+
+	for i := 0; i < b.N; i++ {
+		ConvertToMongo(ctx, exp, nil, nil, expr.Patch(&testVisitor{}))
+	}
+}
+
+type testVisitor struct{}
+
+func (v *testVisitor) Enter(node *ast.Node) {}
+func (v *testVisitor) Exit(node *ast.Node) {
+	if n, ok := (*node).(*ast.IdentifierNode); ok {
+		n.Value = "some" + "." + n.Value
+	}
+}
diff --git a/pkg/expr/slice.go b/pkg/expr/slice.go
new file mode 100644
index 0000000000000000000000000000000000000000..d286e146b79a4f430249db5ae13565ffe2da3764
--- /dev/null
+++ b/pkg/expr/slice.go
@@ -0,0 +1,54 @@
+package expr
+
+const (
+	Unknown uint8 = iota
+	String
+	Int
+	Float
+)
+
+func init() {
+	RegisterOption(
+		Extend("In", In),
+	)
+}
+
+func In(v1, v2 interface{}) bool {
+	if v1 == nil || v2 == nil {
+		return false
+	}
+
+	s1, ok1 := v1.([]interface{})
+	s2, ok2 := v2.([]interface{})
+
+	switch {
+	case ok1 && ok2:
+		return sliceInSlice1(s1, s2)
+	case ok1 && !ok2:
+		return valueInSlice1(v2, s1)
+	case !ok1 && ok2:
+		return valueInSlice1(v1, s2)
+	case !ok1 && !ok2:
+		return v1 == v2
+	}
+
+	return false
+}
+
+func sliceInSlice1(s1, s2 []interface{}) bool {
+	for _, v1 := range s1 {
+		if valueInSlice1(v1, s2) {
+			return true
+		}
+	}
+	return false
+}
+
+func valueInSlice1(v interface{}, s []interface{}) bool {
+	for _, e := range s {
+		if e == v {
+			return true
+		}
+	}
+	return false
+}
diff --git a/pkg/expr/slice_test.go b/pkg/expr/slice_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..533c2bebbd29677dfef9951cdbd90596d3c1d027
--- /dev/null
+++ b/pkg/expr/slice_test.go
@@ -0,0 +1,62 @@
+package expr
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/net/context"
+)
+
+func TestSlice(t *testing.T) {
+	ctx := context.Background()
+
+	tests := []struct {
+		name  string
+		eval  string
+		env   map[string]interface{}
+		wantB interface{}
+	}{
+		// nil
+		{"nil#1", "In(a1, a2)", map[string]interface{}{"a1": nil, "a2": nil}, false},
+		{"nil#2", "In(a1, a2)", map[string]interface{}{"a1": nil, "a2": []interface{}{"a", "b"}}, false},
+		{"nil#3", "In(a1, a2)", map[string]interface{}{"a1": nil, "a2": []interface{}{1, 2}}, false},
+		{"nil#4", "In(a1, a2)", map[string]interface{}{"a1": nil, "a2": []interface{}{1.1, 1.2}}, false},
+		{"nil#5", "In(a1, a2)", map[string]interface{}{"a1": nil, "a2": "a"}, false},
+		{"nil#6", "In(a1, a2)", map[string]interface{}{"a1": nil, "a2": 1}, false},
+		{"nil#7", "In(a1, a2)", map[string]interface{}{"a1": nil, "a2": 1.1}, false},
+		// strings
+		{"strings#1", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{"a", "b"}, "a2": []interface{}{"a", "b"}}, true},
+		{"strings#2", "In(a1, a2)", map[string]interface{}{"a1": "b", "a2": []interface{}{"a", "b"}}, true},
+		{"strings#3", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{"a", "b"}, "a2": "b"}, true},
+		{"strings#4", "In(a1, a2)", map[string]interface{}{"a1": "b", "a2": "b"}, true},
+		{"strings#5", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{"a", "b"}, "a2": nil}, false},
+		{"strings#6", "In(a1, a2)", map[string]interface{}{"a1": "c", "a2": []interface{}{"a", "b"}}, false},
+		{"strings#7", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{"a", "b"}, "a2": "c"}, false},
+		{"strings#8", "In(a1, a2)", map[string]interface{}{"a1": "a", "a2": "b"}, false},
+		{"strings#9", "In(a1, a2)", map[string]interface{}{"a1": "1", "a2": 1}, false},
+		// numbers
+		{"numbers#1", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{1, 2}, "a2": []interface{}{1, 2}}, true},
+		{"numbers#5", "In(a1, a2)", map[string]interface{}{"a1": 1, "a2": []interface{}{1, 2}}, true},
+		{"numbers#6", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{1, 2}, "a2": 2}, true},
+		{"numbers#7", "In(a1, a2)", map[string]interface{}{"a1": 3, "a2": []interface{}{1, 2}}, false},
+		{"numbers#8", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{1, 2}, "a2": 3}, false},
+		{"numbers#9", "In(a1, a1)", map[string]interface{}{"a1": []interface{}{1.1, 2.1}, "a2": []interface{}{1.1, 2.1}}, true},
+		{"numbers#10", "In(a1, a2)", map[string]interface{}{"a1": 1.1, "a2": []interface{}{1.1, 2.1}}, true},
+		{"numbers#11", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{1.1, 2.1}, "a2": 2.1}, true},
+		{"numbers#12", "In(a1, a2)", map[string]interface{}{"a1": 3.1, "a2": []interface{}{1.1, 2.1}}, false},
+		{"numbers#13", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{1.1, 2.1}, "a2": 3.1}, false},
+		// mix types
+		{"mix#1", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{"a", "b"}, "a2": map[string]interface{}{"a": "a", "b": "b"}}, false},
+		{"mix#2", "In(a1, a2)", map[string]interface{}{"a1": 2, "a2": "2"}, false},
+		{"mix#3", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{}, "a2": nil}, false},
+		{"mix#4", "In(a1, a2)", map[string]interface{}{"a1": []interface{}{"1", "2"}, "a2": []interface{}{1, 2}}, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotB, err := Eval(ctx, tt.eval, tt.env)
+			require.NoError(t, err)
+			assert.Equal(t, tt.wantB, gotB)
+		})
+	}
+}
diff --git a/pkg/expr/string.go b/pkg/expr/string.go
new file mode 100644
index 0000000000000000000000000000000000000000..0e857b41f3d909437f1e8296fd48e866fdac9104
--- /dev/null
+++ b/pkg/expr/string.go
@@ -0,0 +1,50 @@
+package expr
+
+import "strings"
+
+func init() {
+	RegisterOption(
+		Extend("icontains", IContains),
+		Extend("istartsWith", IStartsWith),
+		Extend("iendsWith", IEndsWith),
+	)
+}
+
+func IContains(v1, v2 interface{}) bool {
+	s1, ok := v1.(string)
+	if !ok {
+		return false
+	}
+	s2, ok := v2.(string)
+	if !ok {
+		return false
+	}
+
+	return strings.Contains(strings.ToLower(s1), strings.ToLower(s2))
+}
+
+func IStartsWith(v1, v2 interface{}) bool {
+	s1, ok := v1.(string)
+	if !ok {
+		return false
+	}
+	s2, ok := v2.(string)
+	if !ok {
+		return false
+	}
+
+	return strings.HasPrefix(strings.ToLower(s1), strings.ToLower(s2))
+}
+
+func IEndsWith(v1, v2 interface{}) bool {
+	s1, ok := v1.(string)
+	if !ok {
+		return false
+	}
+	s2, ok := v2.(string)
+	if !ok {
+		return false
+	}
+
+	return strings.HasSuffix(strings.ToLower(s1), strings.ToLower(s2))
+}
diff --git a/pkg/expr/string_test.go b/pkg/expr/string_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..ee8e69fada36dfb394d2dd10d3c54d9c950033bf
--- /dev/null
+++ b/pkg/expr/string_test.go
@@ -0,0 +1,84 @@
+package expr
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIContains(t *testing.T) {
+	tests := []struct {
+		name string
+		s1   interface{}
+		s2   interface{}
+		want bool
+	}{
+		{name: "nil#1", s1: nil, s2: nil, want: false},
+		{name: "nil#2", s1: nil, s2: "hello", want: false},
+		{name: "nil#3", s1: "hello", s2: nil, want: false},
+		{name: "notstring#1", s1: map[string]interface{}{"a1": []interface{}{"a", "b"}}, s2: "hello", want: false},
+		{name: "notstring#2", s1: 1, s2: "hello", want: false},
+		{name: "correct#1", s1: "Abc", s2: "abc", want: true},
+		{name: "correct#2", s1: "HELLO", s2: "hello", want: true},
+		{name: "correct#3", s1: "abcDeFGh", s2: "dEFg", want: true},
+		{name: "correct#4", s1: "heLLOworLD", s2: "ORL", want: true},
+		{name: "incorrect#1", s1: "HELLO", s2: "elloo", want: false},
+		{name: "incorrect#2", s1: "world", s2: "Word", want: false},
+		{name: "incorrect#3", s1: "heLLOworLD", s2: "OOo", want: false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equalf(t, tt.want, IContains(tt.s1, tt.s2), "Icontains(%v, %v)", tt.s1, tt.s2)
+		})
+	}
+}
+
+func TestIEndsWith(t *testing.T) {
+	tests := []struct {
+		name string
+		s1   interface{}
+		s2   interface{}
+		want bool
+	}{
+		{name: "nil#1", s1: nil, s2: nil, want: false},
+		{name: "nil#2", s1: nil, s2: "hello", want: false},
+		{name: "nil#3", s1: "hello", s2: nil, want: false},
+		{name: "notstring#1", s1: map[string]interface{}{"a1": []interface{}{"a", "b"}}, s2: "hello", want: false},
+		{name: "notstring#2", s1: 1, s2: "hello", want: false},
+		{name: "correct#1", s1: "helloabc", s2: "Abc", want: true},
+		{name: "correct#2", s1: "worldhello", s2: "HELLO", want: true},
+		{name: "correct#3", s1: "abcDeFGh", s2: "FGH", want: true},
+		{name: "incorrect#1", s1: "ello", s2: "HeLLo", want: false},
+		{name: "incorrect#2", s1: "Word", s2: "world", want: false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equalf(t, tt.want, IEndsWith(tt.s1, tt.s2), "IendsWith(%v, %v)", tt.s1, tt.s2)
+		})
+	}
+}
+
+func TestIStartsWith(t *testing.T) {
+	tests := []struct {
+		name string
+		s1   interface{}
+		s2   interface{}
+		want bool
+	}{
+		{name: "nil#1", s1: nil, s2: nil, want: false},
+		{name: "nil#2", s1: nil, s2: "hello", want: false},
+		{name: "nil#3", s1: "hello", s2: nil, want: false},
+		{name: "notstring#1", s1: map[string]interface{}{"a1": []interface{}{"a", "b"}}, s2: "hello", want: false},
+		{name: "notstring#2", s1: 1, s2: "hello", want: false},
+		{name: "correct#1", s1: "helloabc", s2: "he", want: true},
+		{name: "correct#2", s1: "worldhello", s2: "WOR", want: true},
+		{name: "correct#3", s1: "abcDeFGh", s2: "ABC", want: true},
+		{name: "incorrect#1", s1: "ello", s2: "HeLLo", want: false},
+		{name: "incorrect#2", s1: "Word", s2: "world", want: false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equalf(t, tt.want, IStartsWith(tt.s1, tt.s2), "IstartsWith(%v, %v)", tt.s1, tt.s2)
+		})
+	}
+}
diff --git a/pkg/expr/time.go b/pkg/expr/time.go
new file mode 100644
index 0000000000000000000000000000000000000000..740da301a70b65a15f83ac70b1f512c47c171b35
--- /dev/null
+++ b/pkg/expr/time.go
@@ -0,0 +1,79 @@
+package expr
+
+import (
+	"time"
+
+	"github.com/antonmedv/expr"
+)
+
+const DefaultTimeLayout = time.RFC3339
+const DefaultDateLayout = "2006-01-02"
+
+type TimeExpr struct{}
+
+func init() {
+	RegisterOption(
+		Extend("Time", TimeExpr{}),
+		expr.Operator("==", "Time.Equal"),
+		expr.Operator("<", "Time.Before"),
+		expr.Operator(">", "Time.After"),
+		expr.Operator("<=", "Time.BeforeOrEqual"),
+		expr.Operator(">", "Time.After"),
+		expr.Operator(">=", "Time.AfterOrEqual"),
+
+		// Time and duration manipulation.
+		expr.Operator("+", "Time.Add"),
+		expr.Operator("-", "Time.Sub"),
+
+		// Operators override for duration comprising.
+		expr.Operator("==", "Time.EqualDuration"),
+		expr.Operator("<", "Time.BeforeDuration"),
+		expr.Operator("<=", "Time.BeforeOrEqualDuration"),
+		expr.Operator(">", "Time.AfterDuration"),
+		expr.Operator(">=", "Time.AfterOrEqualDuration"),
+	)
+}
+
+func (TimeExpr) Time(v interface{}) time.Time {
+	switch val := v.(type) {
+
+	case string:
+		if t, err := time.Parse(DefaultTimeLayout, val); err != nil {
+			panic(err)
+		} else {
+			return t
+		}
+	case time.Time:
+		return v.(time.Time)
+	}
+	return v.(time.Time)
+}
+
+func (TimeExpr) Date(s string) time.Time {
+	t, err := time.Parse(DefaultDateLayout, s)
+	if err != nil {
+		panic(err)
+	}
+	return t
+}
+func (TimeExpr) Duration(s string) time.Duration {
+	d, err := time.ParseDuration(s)
+	if err != nil {
+		panic(err)
+	}
+	return d
+}
+
+func (TimeExpr) Now() time.Time                                { return time.Now() }
+func (TimeExpr) Equal(a, b time.Time) bool                     { return a.Equal(b) }
+func (TimeExpr) Before(a, b time.Time) bool                    { return a.Before(b) }
+func (TimeExpr) BeforeOrEqual(a, b time.Time) bool             { return a.Before(b) || a.Equal(b) }
+func (TimeExpr) After(a, b time.Time) bool                     { return a.After(b) }
+func (TimeExpr) AfterOrEqual(a, b time.Time) bool              { return a.After(b) || a.Equal(b) }
+func (TimeExpr) Add(a time.Time, b time.Duration) time.Time    { return a.Add(b) }
+func (TimeExpr) Sub(a, b time.Time) time.Duration              { return a.Sub(b) }
+func (TimeExpr) EqualDuration(a, b time.Duration) bool         { return a == b }
+func (TimeExpr) BeforeDuration(a, b time.Duration) bool        { return a < b }
+func (TimeExpr) BeforeOrEqualDuration(a, b time.Duration) bool { return a <= b }
+func (TimeExpr) AfterDuration(a, b time.Duration) bool         { return a > b }
+func (TimeExpr) AfterOrEqualDuration(a, b time.Duration) bool  { return a >= b }
diff --git a/pkg/id/id.go b/pkg/id/id.go
new file mode 100644
index 0000000000000000000000000000000000000000..cfb8b6390ac48e50ed5fb899db11316b3f1df31c
--- /dev/null
+++ b/pkg/id/id.go
@@ -0,0 +1,7 @@
+package id
+
+import "github.com/rs/xid"
+
+func GenerateNewID() string {
+	return xid.New().String()
+}
diff --git a/pkg/permission/permission.go b/pkg/permission/permission.go
new file mode 100644
index 0000000000000000000000000000000000000000..7a90e5079da08648cbdefe565d39f4d8b801a275
--- /dev/null
+++ b/pkg/permission/permission.go
@@ -0,0 +1,64 @@
+package permission
+
+import (
+	"git.perx.ru/perxis/perxis-go/pkg/data"
+	"git.perx.ru/perxis/perxis-go/pkg/expr"
+)
+
+type Access uint64
+
+const (
+	AccessAny  = iota // Access to any items (default)
+	AccessMine        // Access to items owned by me (future use)
+	AccessRole        // Access to items owned by my role (future use)
+)
+
+type Permission struct {
+	Permitted       bool
+	UnallowedFields []string
+	Filter          string
+}
+
+func (p Permission) Can() bool {
+	return p.Permitted
+}
+
+func Merge(pp ...*Permission) *Permission {
+
+	res := new(Permission)
+
+	var filters []string
+
+	res.Permitted = true
+	for _, p := range pp {
+		res.Permitted = res.Permitted && p.Permitted
+
+		if p.Filter != "" {
+			filters = append(filters, p.Filter)
+		}
+
+		for _, fld := range p.UnallowedFields {
+			if !data.Contains(fld, res.UnallowedFields) {
+				res.UnallowedFields = append(res.UnallowedFields, fld)
+			}
+		}
+	}
+
+	res.Filter = expr.And(data.SetFromSlice(filters)...)
+
+	return res
+}
+
+func (p Permission) RemoveFields(in map[string]interface{}) map[string]interface{} {
+	if in == nil {
+		return nil
+	}
+	out := make(map[string]interface{})
+	for k, v := range in {
+		if data.Contains(k, p.UnallowedFields) {
+			continue
+		}
+		out[k] = v
+	}
+	return out
+}
diff --git a/pkg/permission/ruleset.go b/pkg/permission/ruleset.go
new file mode 100644
index 0000000000000000000000000000000000000000..b9a84f3747223cf4139c905e3d65ebb9f4dea336
--- /dev/null
+++ b/pkg/permission/ruleset.go
@@ -0,0 +1,266 @@
+package permission
+
+import (
+	"git.perx.ru/perxis/perxis-go/pkg/data"
+	perxisexpr "git.perx.ru/perxis/perxis-go/pkg/expr"
+)
+
+type Action uint64
+
+const (
+	//ActionAny Action = iota
+	ActionCreate Action = iota + 1
+	ActionRead
+	ActionUpdate
+	ActionDelete
+)
+
+// Rule - правило доступа к контенту
+type Rule struct {
+	CollectionID string   `json:"collectionId" bson:"collectionId,omitempty"`
+	Actions      []Action `json:"actions" bson:"actions,omitempty"`
+	Access       Access   `json:"access" bson:"access,omitempty"`
+	// Поля не передаются API клиенту
+	HiddenFields []string `json:"hiddenFields,omitempty" bson:"hiddenFields,omitempty"`
+	// Клиент не может сохранять данные поля
+	ReadonlyFields []string `json:"readonlyFields,omitempty" bson:"readonlyFields,omitempty"`
+	// Клиент может сохранить данные поля, но поля не передаются в API
+	WriteonlyFields []string `json:"writeonlyFields,omitempty" bson:"writeonlyFields,omitempty"`
+	// Дополнительный фильтр
+	ReadFilter  string `json:"readFilter,omitempty" bson:"readFilter,omitempty"`
+	WriteFilter string `json:"writeFilter,omitempty" bson:"writeFilter,omitempty"`
+}
+
+func NewRule(collectionID string, actions ...Action) *Rule {
+	return &Rule{
+		CollectionID: collectionID,
+		Actions:      actions,
+	}
+}
+
+func (r Rule) Clone() *Rule {
+	return &Rule{
+		CollectionID:    r.CollectionID,
+		Actions:         append([]Action(nil), r.Actions...),
+		Access:          r.Access,
+		HiddenFields:    append([]string(nil), r.HiddenFields...),
+		ReadonlyFields:  append([]string(nil), r.ReadonlyFields...),
+		WriteonlyFields: append([]string(nil), r.WriteonlyFields...),
+		ReadFilter:      r.ReadFilter,
+		WriteFilter:     r.WriteFilter,
+	}
+}
+
+func (r Rule) WithReadFilter(f string) *Rule {
+	return &Rule{
+		CollectionID:    r.CollectionID,
+		Actions:         append([]Action(nil), r.Actions...),
+		Access:          r.Access,
+		HiddenFields:    append([]string(nil), r.HiddenFields...),
+		ReadonlyFields:  append([]string(nil), r.ReadonlyFields...),
+		WriteonlyFields: append([]string(nil), r.WriteonlyFields...),
+		ReadFilter:      f,
+		WriteFilter:     r.WriteFilter,
+	}
+}
+
+func (r Rule) WithWriteFilter(f string) *Rule {
+	return &Rule{
+		CollectionID:    r.CollectionID,
+		Actions:         append([]Action(nil), r.Actions...),
+		Access:          r.Access,
+		HiddenFields:    append([]string(nil), r.HiddenFields...),
+		ReadonlyFields:  append([]string(nil), r.ReadonlyFields...),
+		WriteonlyFields: append([]string(nil), r.WriteonlyFields...),
+		ReadFilter:      r.ReadFilter,
+		WriteFilter:     f,
+	}
+}
+
+func (r Rule) WithReadWriteFilter(f string) *Rule {
+	return &Rule{
+		CollectionID:    r.CollectionID,
+		Actions:         append([]Action(nil), r.Actions...),
+		Access:          r.Access,
+		HiddenFields:    append([]string(nil), r.HiddenFields...),
+		ReadonlyFields:  append([]string(nil), r.ReadonlyFields...),
+		WriteonlyFields: append([]string(nil), r.WriteonlyFields...),
+		ReadFilter:      f,
+		WriteFilter:     f,
+	}
+}
+
+func (r Rule) WithReadonlyFields(ff ...string) *Rule {
+	return &Rule{
+		CollectionID:    r.CollectionID,
+		Actions:         append([]Action(nil), r.Actions...),
+		Access:          r.Access,
+		HiddenFields:    append([]string(nil), r.HiddenFields...),
+		ReadonlyFields:  append(ff, r.ReadonlyFields...),
+		WriteonlyFields: append([]string(nil), r.WriteonlyFields...),
+		ReadFilter:      r.ReadFilter,
+		WriteFilter:     r.WriteFilter,
+	}
+}
+
+func (r Rule) WithHiddenFields(ff ...string) *Rule {
+	return &Rule{
+		CollectionID:    r.CollectionID,
+		Actions:         append([]Action(nil), r.Actions...),
+		Access:          r.Access,
+		HiddenFields:    append(ff, r.HiddenFields...),
+		ReadonlyFields:  append([]string(nil), r.ReadonlyFields...),
+		WriteonlyFields: append([]string(nil), r.WriteonlyFields...),
+		ReadFilter:      r.ReadFilter,
+		WriteFilter:     r.WriteFilter,
+	}
+}
+
+func (r Rule) GetPermission(action Action) *Permission {
+	for _, a := range r.Actions {
+		if a == action {
+			p := &Permission{
+				Permitted: true,
+			}
+
+			switch action {
+			case ActionRead:
+				p.Filter = r.ReadFilter
+				p.UnallowedFields = append(p.UnallowedFields, r.HiddenFields...)
+				p.UnallowedFields = append(p.UnallowedFields, r.WriteonlyFields...)
+			case ActionCreate, ActionUpdate, ActionDelete:
+				p.Filter = r.WriteFilter
+				p.UnallowedFields = append(p.UnallowedFields, r.ReadonlyFields...)
+			}
+
+			return p
+		}
+	}
+
+	return &Permission{}
+}
+
+type Ruleset interface {
+	GetRule(collectionID string) *Rule
+	Permission(collectionID string, action Action) *Permission
+}
+
+type Rules []*Rule
+
+func (r Rules) Permission(collectionID string, action Action) *Permission {
+	rule := r.GetRule(collectionID)
+	return rule.GetPermission(action)
+}
+
+func (r Rules) GetRule(collectionID string) *Rule {
+	for _, rule := range r {
+		if data.GlobMatch(collectionID, rule.CollectionID) {
+			return rule
+		}
+	}
+	return nil
+}
+
+func MergeRules(src, in Rules) Rules {
+	dst := make(Rules, 0, len(src)+len(in))
+	seen := make(map[string]struct{})
+
+	for _, rule := range src {
+		if _, ok := seen[rule.CollectionID]; !ok {
+			dst = append(dst, rule)
+			seen[rule.CollectionID] = struct{}{}
+		}
+	}
+
+	for _, rule := range in {
+		if _, ok := seen[rule.CollectionID]; !ok {
+			dst = append(dst, rule)
+			seen[rule.CollectionID] = struct{}{}
+		}
+	}
+
+	return dst
+}
+
+// MergeRule объединяет несколько Rule в один
+//   - пересечение действий
+//   - объединение hidden, readOnly, writeOnly fields
+//   - объединение фильтров
+func MergeRule(rules ...*Rule) *Rule {
+
+	if len(rules) == 0 {
+		return nil
+	}
+
+	var result *Rule
+	var writeFilter []string
+	var readFilter []string
+
+	for i, r := range rules {
+		if i == 0 { // first element
+
+			result = r.Clone()
+
+			result.CollectionID = ""
+			if result.WriteFilter != "" {
+				writeFilter = append(writeFilter, result.WriteFilter)
+			}
+			if result.ReadFilter != "" {
+				readFilter = append(readFilter, result.ReadFilter)
+			}
+
+			continue
+		}
+
+		result.Actions = data.GetIntersection(result.Actions, r.Actions)
+		result.HiddenFields = data.SetFromSlice(append(result.HiddenFields, r.HiddenFields...))
+		result.ReadonlyFields = data.SetFromSlice(append(result.ReadonlyFields, r.ReadonlyFields...))
+		result.WriteonlyFields = data.SetFromSlice(append(result.WriteonlyFields, r.WriteonlyFields...))
+		if r.WriteFilter != "" {
+			writeFilter = append(writeFilter, r.WriteFilter)
+		}
+		if r.ReadFilter != "" {
+			readFilter = append(readFilter, r.ReadFilter)
+		}
+	}
+
+	result.WriteFilter = perxisexpr.And(data.SetFromSlice(writeFilter)...)
+	result.ReadFilter = perxisexpr.And(data.SetFromSlice(readFilter)...)
+
+	return result
+}
+
+type PrivilegedRuleset struct{}
+
+func (r PrivilegedRuleset) Permission(_ string, _ Action) *Permission {
+	return &Permission{
+		Permitted:       true,
+		UnallowedFields: []string{},
+	}
+}
+
+func (r PrivilegedRuleset) GetRule(collectionID string) *Rule {
+	return &Rule{
+		CollectionID:    collectionID,
+		Actions:         []Action{ActionRead, ActionCreate, ActionUpdate, ActionDelete},
+		HiddenFields:    []string{},
+		ReadonlyFields:  []string{},
+		WriteonlyFields: []string{},
+	}
+}
+
+func Create(r Ruleset, collectionID string) *Permission {
+	return r.Permission(collectionID, ActionCreate)
+}
+
+func Read(r Ruleset, collectionID string) *Permission {
+	return r.Permission(collectionID, ActionRead)
+}
+
+func Update(r Ruleset, collectionID string) *Permission {
+	return r.Permission(collectionID, ActionUpdate)
+}
+
+func Delete(r Ruleset, collectionID string) *Permission {
+	return r.Permission(collectionID, ActionDelete)
+}
diff --git a/pkg/permission/ruleset_test.go b/pkg/permission/ruleset_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..47c1f07614b1d2edef196db6238adaf40b33e073
--- /dev/null
+++ b/pkg/permission/ruleset_test.go
@@ -0,0 +1,51 @@
+package permission
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMerge(t *testing.T) {
+	const (
+		col1 = "colID"
+		col2 = "colViewID"
+	)
+
+	tests := []struct {
+		name                  string
+		first, second, expect *Rule
+	}{
+		{
+			name:   "simple",
+			first:  &Rule{Actions: []Action{ActionUpdate, ActionCreate}, CollectionID: col1, HiddenFields: []string{"1", "2"}, WriteonlyFields: []string{"7"}, ReadonlyFields: []string{"4"}, ReadFilter: "3 != 'test'", WriteFilter: "4 == '0_0'"},
+			second: &Rule{Actions: []Action{ActionUpdate, ActionDelete}, CollectionID: col2, HiddenFields: []string{"3", "2"}, WriteonlyFields: []string{}, ReadonlyFields: []string{"5"}, ReadFilter: "5 != 'dev'", WriteFilter: "4 == '0_0'"},
+			expect: &Rule{Actions: []Action{ActionUpdate}, HiddenFields: []string{"1", "2", "3"}, WriteonlyFields: []string{"7"}, ReadonlyFields: []string{"4", "5"}, ReadFilter: "3 != 'test' && 5 != 'dev'", WriteFilter: "4 == '0_0'"},
+		},
+		{
+			name:   "first is privileged",
+			first:  PrivilegedRuleset{}.GetRule(col1),
+			second: &Rule{Actions: []Action{ActionUpdate, ActionDelete}, CollectionID: col2, WriteFilter: "test"},
+			expect: &Rule{Actions: []Action{ActionUpdate, ActionDelete}, WriteFilter: "test", ReadFilter: "", HiddenFields: []string{}, WriteonlyFields: []string{}, ReadonlyFields: []string{}},
+		},
+		{
+			name:   "second is privileged",
+			first:  &Rule{Actions: []Action{ActionUpdate, ActionDelete}, CollectionID: col1, WriteFilter: "test"},
+			second: PrivilegedRuleset{}.GetRule(col2),
+			expect: &Rule{Actions: []Action{ActionUpdate, ActionDelete}, WriteFilter: "test", ReadFilter: "", HiddenFields: []string{}, WriteonlyFields: []string{}, ReadonlyFields: []string{}},
+		},
+		{
+			name:   "both is privileged",
+			first:  PrivilegedRuleset{}.GetRule(col1),
+			second: PrivilegedRuleset{}.GetRule(col2),
+			expect: PrivilegedRuleset{}.GetRule(""),
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := MergeRule(tt.first, tt.second)
+			assert.Equal(t, tt.expect, result)
+		})
+	}
+}