'fix'

builder2.go

@@ -248,6 +248,9 @@ func toWhereSql(where interface{}) (string, error) {
 					if whereSql == "" && (w.String() == "and" || w.String() == "or") {
 						operator = w.String()
 					} else {
+						if w.String() == "" {
+							continue
+						}
 						ws = append(ws, w.String())
 					}
 				} else {
@@ -255,6 +258,9 @@ func toWhereSql(where interface{}) (string, error) {
 					if err != nil {
 						return "", err
 					}
+					if newExp == "" {
+						continue
+					}
 					ws = append(ws, newExp)
 				}
 
@@ -316,6 +322,9 @@ func toWhereSql(where interface{}) (string, error) {
 	} else {
 		whereSql = whereGjson.String()
 	}
+	if strings.TrimSpace(whereSql) == "" {
+		return "", nil
+	}
 	return fmt.Sprintf("( %s )", whereSql), nil
 }