| private _buildNullDisplay ( string $class, boolean $condition_field, object $meta, string $align = '' ) : string | ||
| $class | string | class of table cell |
| $condition_field | boolean | whether to add CSS class condition |
| $meta | object | the meta-information about this field |
| $align | string | cell alignment |
| 리턴 | string | the td |
private function _buildNullDisplay($class, $condition_field, $meta, $align = '')
{
// the null class is needed for grid editing
$decimals = isset($meta->decimals) ? $meta->decimals : '-1';
return '<td ' . $align . ' data-decimals="' . $decimals . '" data-type="' . $meta->type . '" class="' . $this->_addClass($class, $condition_field, $meta, '') . ' null"><i>NULL</i></td>';
}