/**
* Renders the filter cell content.
* The default implementation simply renders a space.
* This method may be overridden to customize the rendering of the filter cell (if any).
* @return string the rendering result
*/
protected function renderFilterCellContent()
{
if (is_string($this->filter)) {
return $this->filter;
}
$model = $this->grid->filterModel;
if ($this->filter !== false && $model instanceof Model && $this->attribute !== null && $model->isAttributeActive($this->attribute)) {
if ($model->hasErrors($this->attribute)) {
Html::addCssClass($this->filterOptions, 'has-error');
$error = ' ' . Html::error($model, $this->attribute, $this->grid->filterErrorOptions);
} else {
$error = '';
}
return Html::activeTextInput($model, $this->attribute, $this->filterInputOptions) . $error;
} else {
return parent::renderFilterCellContent();
}
}