WIP: remove permissions when deleting global user

pkg/services/sqlstore/dashboard_acl.go

@@ -17,6 +17,10 @@ func init() {
 
 func AddOrUpdateDashboardPermission(cmd *m.AddOrUpdateDashboardPermissionCommand) error {
 	return inTransaction(func(sess *DBSession) error {
+		if cmd.UserId == 0 && cmd.UserGroupId == 0 {
+			return m.ErrDashboardPermissionUserOrUserGroupEmpty
+		}
+
 		if res, err := sess.Query("SELECT 1 from "+dialect.Quote("dashboard_acl")+" WHERE dashboard_id =? and (user_group_id=? or user_id=?)", cmd.DashboardId, cmd.UserGroupId, cmd.UserId); err != nil {
 			return err
 		} else if len(res) == 1 {