/**
* Generates a tag that contains the first validation error of the specified model attribute.
* Note that even if there is no validation error, this method will still return an empty error tag.
* @param Model $model the model object
* @param string $attribute the attribute name or expression. See [[getAttributeName()]] for the format
* about attribute expression.
* @param array $options the tag options in terms of name-value pairs. The values will be HTML-encoded
* using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
*
* The following options are specially handled:
*
* - tag: this specifies the tag name. If not set, "div" will be used.
*
* See [[renderTagAttributes()]] for details on how attributes are being rendered.
*
* @return string the generated label tag
*/
public static function error($model, $attribute, $options = [])
{
$attribute = static::getAttributeName($attribute);
$error = $model->getFirstError($attribute);
$tag = isset($options['tag']) ? $options['tag'] : 'div';
unset($options['tag']);
return Html::tag($tag, Html::encode($error), $options);
}
