diff --git a/object/group.go b/object/group.go
index 7aacba84..f0147243 100644
--- a/object/group.go
+++ b/object/group.go
@@ -226,7 +226,7 @@ func GetGroupUserCount(groupId string, field, value string) (int64, error) {
 	} else {
 		return ormer.Engine.Table("user").
 			Where("owner = ?", owner).In("name", names).
-			And(fmt.Sprintf("user.%s LIKE ?", util.CamelToSnakeCase(field)), "%"+value+"%").
+			And(fmt.Sprintf("user.%s like ?", util.CamelToSnakeCase(field)), "%"+value+"%").
 			Count()
 	}
 }
@@ -247,7 +247,7 @@ func GetPaginationGroupUsers(groupId string, offset, limit int, field, value, so
 	}
 
 	if field != "" && value != "" {
-		session = session.And(fmt.Sprintf("user.%s LIKE ?", util.CamelToSnakeCase(field)), "%"+value+"%")
+		session = session.And(fmt.Sprintf("user.%s like ?", util.CamelToSnakeCase(field)), "%"+value+"%")
 	}
 
 	if sortField == "" || sortOrder == "" {
diff --git a/object/permission.go b/object/permission.go
index b7e366d1..f28d6eff 100644
--- a/object/permission.go
+++ b/object/permission.go
@@ -258,9 +258,18 @@ func DeletePermission(permission *Permission) (bool, error) {
 	return affected != 0, nil
 }
 
-func GetPermissionsAndRolesByUser(userId string) ([]*Permission, []*Role, error) {
+func getPermissionsByUser(userId string) ([]*Permission, error) {
 	permissions := []*Permission{}
 	err := ormer.Engine.Where("users like ?", "%"+userId+"\"%").Find(&permissions)
+	if err != nil {
+		return permissions, err
+	}
+
+	return permissions, nil
+}
+
+func getPermissionsAndRolesByUser(userId string) ([]*Permission, []*Role, error) {
+	permissions, err := getPermissionsByUser(userId)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -277,14 +286,13 @@ func GetPermissionsAndRolesByUser(userId string) ([]*Permission, []*Role, error)
 
 	permFromRoles := []*Permission{}
 
-	roles, err := GetRolesByUser(userId)
+	roles, err := getRolesByUser(userId)
 	if err != nil {
 		return nil, nil, err
 	}
 
 	for _, role := range roles {
-		perms := []*Permission{}
-		err := ormer.Engine.Where("roles like ?", "%"+role.GetId()+"\"%").Find(&perms)
+		perms, err := GetPermissionsByRole(role.GetId())
 		if err != nil {
 			return nil, nil, err
 		}
diff --git a/object/permission_enforcer.go b/object/permission_enforcer.go
index e15ee5ce..23f63b48 100644
--- a/object/permission_enforcer.go
+++ b/object/permission_enforcer.go
@@ -258,7 +258,7 @@ func BatchEnforce(permission *Permission, requests *[]CasbinRequest, permissionI
 }
 
 func getAllValues(userId string, fn func(enforcer *casbin.Enforcer) []string) []string {
-	permissions, _, err := GetPermissionsAndRolesByUser(userId)
+	permissions, _, err := getPermissionsAndRolesByUser(userId)
 	if err != nil {
 		panic(err)
 	}
@@ -293,7 +293,7 @@ func GetAllActions(userId string) []string {
 }
 
 func GetAllRoles(userId string) []string {
-	roles, err := GetRolesByUser(userId)
+	roles, err := getRolesByUser(userId)
 	if err != nil {
 		panic(err)
 	}
diff --git a/object/role.go b/object/role.go
index 9dccbcb2..1ca0b1aa 100644
--- a/object/role.go
+++ b/object/role.go
@@ -252,15 +252,23 @@ func (role *Role) GetId() string {
 	return fmt.Sprintf("%s/%s", role.Owner, role.Name)
 }
 
-func GetRolesByUser(userId string) ([]*Role, error) {
+func getRolesByUserInternal(userId string) ([]*Role, error) {
 	roles := []*Role{}
 	err := ormer.Engine.Where("users like ?", "%"+userId+"\"%").Find(&roles)
 	if err != nil {
 		return roles, err
 	}
 
-	allRolesIds := make([]string, 0, len(roles))
+	return roles, nil
+}
 
+func getRolesByUser(userId string) ([]*Role, error) {
+	roles, err := getRolesByUserInternal(userId)
+	if err != nil {
+		return roles, err
+	}
+
+	allRolesIds := []string{}
 	for _, role := range roles {
 		allRolesIds = append(allRolesIds, role.GetId())
 	}
@@ -336,16 +344,6 @@ func GetMaskedRoles(roles []*Role) []*Role {
 	return roles
 }
 
-func GetRolesByNamePrefix(owner string, prefix string) ([]*Role, error) {
-	roles := []*Role{}
-	err := ormer.Engine.Where("owner=? and name like ?", owner, prefix+"%").Find(&roles)
-	if err != nil {
-		return roles, err
-	}
-
-	return roles, nil
-}
-
 // GetAncestorRoles returns a list of roles that contain the given roleIds
 func GetAncestorRoles(roleIds ...string) ([]*Role, error) {
 	var (
diff --git a/object/user.go b/object/user.go
index e858e71c..17f02a24 100644
--- a/object/user.go
+++ b/object/user.go
@@ -796,7 +796,7 @@ func ExtendUserWithRolesAndPermissions(user *User) (err error) {
 		return
 	}
 
-	user.Permissions, user.Roles, err = GetPermissionsAndRolesByUser(user.GetId())
+	user.Permissions, user.Roles, err = getPermissionsAndRolesByUser(user.GetId())
 	if err != nil {
 		return err
 	}