send params to govalidator custom messages

[aliworkshop]

rules := govalidator.MapData{
		"title": 		[]string{"required"},
		"description":    []string{"required", "min:4", "max:20"},
		"file:image":    []string{ "mime:image/jpg,image/png"},
		"file:file":    []string{ "mime:video/mp4","size:1000"},
	}

	messages := govalidator.MapData{
		"title": []string{"required: Is Required"},
		"description":    []string{"required: Is Required","max: must be %d chars maximum"},
		"file:image": []string{"required: Is Required"},
		"file:file": []string{"required: Is Required"},
	}

	opts := govalidator.Options{
		Request:         r,        // request object
		Rules:           rules,    // rules map
		Messages:        messages, // custom message map (Optional)
		RequiredDefault: true,     // all the field to be pass the rules
	}
	vgov := govalidator.New(opts)
	return vgov.Validate()

if we want send params to custom messages we have to write params statically
but if you change rules.go file like this , we can send any params to custom messages

i change max rule for example

AddCustomRule("max", func(field string, rule string, message string, value interface{}) error {
		mustLen := strings.TrimPrefix(rule, "max:")
		lenInt, err := strconv.Atoi(mustLen)
		if err != nil {
			panic(errStringToInt)
		}
		lenFloat, err := strconv.ParseFloat(mustLen, 64)
		if err != nil {
			panic(errStringToFloat)
		}
		errMsg := fmt.Errorf("The %s field value can not be greater than %d", field, lenInt)
		if message != "" {
			errMsg = fmt.Errorf(message, lenInt)
		}
		errMsgFloat := fmt.Errorf("The %s field value can not be greater than %f", field, lenFloat)
		if message != "" {
			errMsgFloat = fmt.Errorf(message, lenFloat)
		}
		rv := reflect.ValueOf(value)
		switch rv.Kind() {
		case reflect.String:
			inLen := rv.Len()
			if inLen > lenInt {
				if message != "" {
					return fmt.Errorf(message, lenInt)
				}
				return fmt.Errorf("The %s field must be maximum %d char", field, lenInt)
			}
...