Method Custom

pkg/modules/api/formdata.go:270–282

Custom helps to define a custom binding function for a form field. var foo map[string]string ctx.FormData().Custom("foo", func(value string) error { if value == "" { foo = "bar" return nil } err := json.Unmarshal([]byte(value), &foo) if err != nil { return fmt.Errorf

(key string, assign func(value string) error)

//	  return nil
//	})
func (form *FormData) Custom(key string, assign func(value string) error) *FormData {
	var value string
	form.mustValue(key, &value, "")

	err := assign(value)
	if err != nil {
		form.append(
			fmt.Errorf("form field '%s' is invalid (got '%s', resulting to %w)", key, value, err),
		)
	}

	return form
}

// MandatoryCustom helps to define a custom binding function for a form field.
// It populates an error if the value is empty or the "key" does not exist.