protected function _keyIndex() {
		if (!($model = $this->_model) || !isset($this->_columns[''])) {
			return [];
		}
		$index = 0;

		foreach ($this->_columns as $name => $fields) {
			if ($name === '') {
				if (($offset = array_search($model::meta('key'), $fields)) === false) {
					return [];
				}
				return [$index + $offset => $model::meta('key')];
			}
			$index += count($fields);
		}
		return [];
	}
protected function _keyIndex() {
		if (!($model = $this->_model) || !isset($this->_columns[''])) {
			return [];
		}
		$index = 0;

		foreach ($this->_columns as $name => $fields) {
			if ($name === '') {
				if (($offset = array_search($model::meta('key'), $fields)) === false) {
					return [];
				}
				return [$index + $offset => $model::meta('key')];
			}
			$index += count($fields);
		}
		return [];
	}
protected function _keyIndex ( ) { if ( ! ( $ model = $ this -> _model ) || ! isset ( $ this -> _columns [ '' ] ) ) { return [ ] ; } $ index = 0 ; foreach ( $ this -> _columns as $ name => $ fields ) { if ( $ name === '' ) { if ( ( $ offset = array_search ( $ model :: meta ( 'key' ) , $ fields ) ) === false ) { return [ ] ; } return [ $ index + $ offset => $ model :: meta ( 'key' ) ] ; } $ index += count ( $ fields ) ; } return [ ] ; }
Extracts the numerical index of the primary key in numerical indexed row data.
Works only for the main row data and not for relationship rows.

This method will also correctly detect a primary key which doesn't come
first.

@return array An array where key are index and value are primary key fieldname.
Extracts the numerical index of the primary key in numerical indexed row data . Works only for the main row data and not for relationship rows .