func (e *SelectionValidator) processField(fieldName string, field *structs.Field) error {
fieldName += field.Name()
switch field.Kind() {
case reflect.Struct:
// this is used for error messages below, when we have an error at the
// child properties add parent properties into the error message as well
fieldName += "."
for _, f := range field.Fields() {
if err := e.processField(fieldName, f); err != nil {
return err
}
}
default:
if field.IsZero() {
return nil
}
selectionStr := field.Tag(e.SelectTagName)
if selectionStr == "" {
return nil
}
err := validateSelection(field, selectionStr)
if err != nil {
return err
}
}
return nil
}
func (e *RequiredValidator) processField(fieldName string, field *structs.Field) error {
fieldName += field.Name()
switch field.Kind() {
case reflect.Struct:
// this is used for error messages below, when we have an error at the
// child properties add parent properties into the error message as well
fieldName += "."
for _, f := range field.Fields() {
if err := e.processField(fieldName, f); err != nil {
return err
}
}
default:
val := field.Tag(e.RequiredTagName)
if val != "true" && val != "1" {
return nil
}
if field.IsZero() {
return fmt.Errorf("Field '%s' is required", fieldName)
}
}
return nil
}
func (e *RangeValidator) processField(fieldName string, field *structs.Field) error {
fieldName += field.Name()
switch field.Kind() {
case reflect.Struct:
// this is used for error messages below, when we have an error at the
// child properties add parent properties into the error message as well
fieldName += "."
for _, f := range field.Fields() {
if err := e.processField(fieldName, f); err != nil {
return err
}
}
default:
if field.IsZero() { //if not initialized, we won't validate it
return nil
}
minStr := field.Tag(e.MinTagName)
maxStr := field.Tag(e.MaxTagName)
if minStr == "" && maxStr == "" {
return nil
}
err := validateRange(field, minStr, maxStr)
if err != nil {
return err
}
}
return nil
}