我采取了扩展 Form helper 类的方法,在表单字段上添加一个“错误”类名称,并在字段标签中显示错误消息。
<?php defined('SYSPATH') or die('No direct script access.');
class Form extends Kohana_Form {
private static function attributes($name, & $attributes = NULL, $errors = NULL)
{
// Set the id attribute
if (!isset($attributes['id']))
{
$attributes['id'] = $name;
}
if ($errors !== NULL)
{
// Merge in external validation errors.
$errors = array_merge($errors, (isset($errors['_external']) ? $errors['_external'] : array()));
// Set the error classname
if (isset($errors[$name]))
{
$attributes['class'] = trim( (string) @$attributes['class'].' error-field');
}
}
}
public static function input($name, $value = NULL, array $attributes = NULL, array $errors = NULL)
{
static::attributes($name, $attributes, $errors);
return parent::input($name, $value, $attributes);
}
public static function select($name, array $options = NULL, $selected = NULL, array $attributes = NULL, array $errors = NULL)
{
static::attributes($name, $attributes, $errors);
return parent::select($name, $options, $selected, $attributes);
}
public static function password($name, $value = NULL, array $attributes = NULL, array $errors = NULL)
{
static::attributes($name, $attributes, $errors);
return parent::password($name, $value, $attributes);
}
public static function textarea($name, $body = '', array $attributes = NULL, $double_encode = TRUE, array $errors = NULL)
{
static::attributes($name, $attributes, $errors);
return parent::textarea($name, $body, $attributes, $double_encode);
}
public static function file($name, array $attributes = NULL, array $errors = NULL)
{
static::attributes($name, $attributes, $errors);
return parent::file($name, $attributes);
}
public static function label($input, $text = NULL, array $attributes = NULL, array $errors = NULL, $view = 'messages/label_error')
{
if ($errors !== NULL)
{
// Merge in external validation errors.
$errors = array_merge($errors, (isset($errors['_external']) ? $errors['_external'] : array()));
// Use the label_error view to append an error message to the label
if (isset($errors[$input]))
{
$text .= View::factory($view)->bind('error', $errors[$input]);
}
}
return parent::label($input, $text, $attributes);
}
}
然后将$errors 数组传入标签和字段辅助方法:
<?php echo
Form::label('username', 'Username', NULL, $errors),
Form::input('username', $user->username, NULL, $errors);
?>
这个想法是在 Kohana 论坛上提出的,但我一直在努力寻找原始线程。无论如何,我发现这种方法最适合我。
[编辑] 在此处查看此方法的示例:http://kohana3.badsyntax.co/contact(提交表单)