feat add tag switch to disable form array of split comma format (#4633)

Co-authored-by: wuhongyu <readboy@DESKTOP-T8INU17>

core/mapping/utils.go

@@ -22,6 +22,7 @@ const (
 	optionalOption     = "optional"
 	optionsOption      = "options"
 	rangeOption        = "range"
+	formArrayComma     = "arrayComma"
 	optionSeparator    = "|"
 	equalToken         = "="
 	escapeChar         = '\\'
@@ -160,6 +161,10 @@ func doParseKeyAndOptions(field reflect.StructField, value string) (string, *fie
 	}
 
 	var fieldOpts fieldOptions
+
+	// The comma split form array mode was enabled in 1.7.5
+	// so the default value is true in order not to introduce destructiveness
+	fieldOpts.FormArrayComma = true
 	for _, segment := range options {
 		option := strings.TrimSpace(segment)
 		if err := parseOption(&fieldOpts, field.Name, option); err != nil {
@@ -410,6 +415,12 @@ func parseOption(fieldOpts *fieldOptions, fieldName, option string) error {
 		}
 
 		fieldOpts.Range = nr
+	case strings.HasPrefix(option, formArrayComma):
+		val, err := parseEqBoolOption(fieldName, formArrayComma, option)
+		if err != nil {
+			return err
+		}
+		fieldOpts.FormArrayComma = val
 	}
 
 	return nil
@@ -437,7 +448,21 @@ func parseProperty(field, tag, val string) (string, error) {
 
 	return strings.TrimSpace(segs[1]), nil
 }
-
+func parseEqBoolOption(field, tag, val string) (bool, error) {
+	segs := strings.Split(val, equalToken)
+	switch len(segs) {
+	case 1:
+		return true, nil
+	case 2:
+		parseBool, err := strconv.ParseBool(segs[1])
+		if err != nil {
+			return false, fmt.Errorf("field %q has wrong %s", field, tag)
+		}
+		return parseBool, nil
+	default:
+		return false, fmt.Errorf("field %q has wrong %s", field, tag)
+	}
+}
 func parseSegments(val string) []string {
 	var segments []string
 	var escaped, grouped bool