DB errors over NotFound

Errors comings from DB have higher priority than logic ones

callback_query.go

@@ -80,9 +80,7 @@ func queryCallback(scope *Scope) {
 
 			if err := rows.Err(); err != nil {
 				scope.Err(err)
-			}
-
-			if scope.db.RowsAffected == 0 && !isSlice {
+			} else if scope.db.RowsAffected == 0 && !isSlice {
 				scope.Err(ErrRecordNotFound)
 			}
 		}