diff --git a/biz/application/service/system.go b/biz/application/service/system.go
index a6240eb..86d427b 100644
--- a/biz/application/service/system.go
+++ b/biz/application/service/system.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"time"
 
+	"github.com/samber/lo"
 	"github.com/xh-polaris/service-idl-gen-go/kitex_gen/meowchat/system"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 
@@ -326,12 +327,11 @@ func (s *SystemServiceImpl) RetrieveUserRole(ctx context.Context, req *system.Re
 			return nil, err
 		}
 	}
-
 	var res = make([]*system.Role, len(userRole.Roles))
 	for i, role := range userRole.Roles {
 		res[i] = &system.Role{
 			RoleType:    RoleTypeValue[role.Type],
-			CommunityId: &role.CommunityId,
+			CommunityId: lo.EmptyableToPtr(role.CommunityId),
 		}
 	}
 
diff --git a/go.mod b/go.mod
index d1f817f..649d483 100644
--- a/go.mod
+++ b/go.mod
@@ -63,6 +63,7 @@ require (
 	github.com/prometheus/client_model v0.3.0 // indirect
 	github.com/prometheus/common v0.42.0 // indirect
 	github.com/prometheus/procfs v0.10.1 // indirect
+	github.com/samber/lo v1.38.1 // indirect
 	github.com/spaolacci/murmur3 v1.1.0 // indirect
 	github.com/stretchr/testify v1.8.4 // indirect
 	github.com/tidwall/gjson v1.14.4 // indirect
@@ -88,6 +89,7 @@ require (
 	go.uber.org/automaxprocs v1.5.3 // indirect
 	golang.org/x/arch v0.2.0 // indirect
 	golang.org/x/crypto v0.13.0 // indirect
+	golang.org/x/exp v0.0.0-20220303212507-bbda1eaf7a17 // indirect
 	golang.org/x/net v0.15.0 // indirect
 	golang.org/x/sync v0.3.0 // indirect
 	golang.org/x/sys v0.12.0 // indirect
diff --git a/go.sum b/go.sum
index 6849301..bed394a 100644
--- a/go.sum
+++ b/go.sum
@@ -348,6 +348,8 @@ github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFR
 github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
 github.com/ruudk/golang-pdf417 v0.0.0-20181029194003-1af4ab5afa58/go.mod h1:6lfFZQK844Gfx8o5WFuvpxWRwnSoipWe/p622j1v06w=
 github.com/ruudk/golang-pdf417 v0.0.0-20201230142125-a7e3863a1245/go.mod h1:pQAZKsJ8yyVxGRWYNEm9oFB8ieLgKFnamEyDmSA0BRk=
+github.com/samber/lo v1.38.1 h1:j2XEAqXKb09Am4ebOg31SpvzUTTs6EN3VfgeLUhPdXM=
+github.com/samber/lo v1.38.1/go.mod h1:+m/ZKRl6ClXCE2Lgf3MsQlWfh4bn1bz6CXEOxnEXnEA=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykElWQ6/NYmHa3jpm/yHnI4xSofP+UP6SpjHcSeM=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
 github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
@@ -474,6 +476,8 @@ golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u0
 golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
 golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
+golang.org/x/exp v0.0.0-20220303212507-bbda1eaf7a17 h1:3MTrJm4PyNL9NBqvYDSj3DHl46qQakyfqfWo4jgfaEM=
+golang.org/x/exp v0.0.0-20220303212507-bbda1eaf7a17/go.mod h1:lgLbSvA5ygNOMpwM/9anMpWVlVJ7Z+cHWq/eFuinpGE=
 golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81/go.mod h1:ux5Hcp/YLpHSI86hEcLt0YII63i6oz57MZXIpbrjZUs=
 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
 golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=