silverstripe-framework/forms/gridfield/GridFieldRelationDelete.php
2012-03-05 12:27:25 +01:00

105 lines
2.7 KiB
PHP

<?php
/**
* Allows to detach an item from an existing has_many or many_many relationship.
* Similar to {@link GridFieldAction_Delete}, but allows to distinguish between
* a "delete" and "detach" action in the UI - and to use both in parallel, if required.
* Requires the GridField to be populated with a {@link RelationList} rather than a plain {@link DataList}.
* Often used alongside {@link GridFieldRelationAdd} to add existing records to the relationship.
* For easier setup, have a look at a sample configuration in {@link GridFieldConfig_RelationEditor}.
*/
class GridFieldRelationDelete implements GridField_ColumnProvider, GridField_ActionProvider {
/**
* Add a column 'UnlinkRelation'
*
* @param type $gridField
* @param array $columns
*/
public function augmentColumns($gridField, &$columns) {
if(!in_array('Actions', $columns))
$columns[] = 'Actions';
}
/**
* Return any special attributes that will be used for FormField::createTag()
*
* @param GridField $gridField
* @param DataObject $record
* @param string $columnName
* @return array
*/
public function getColumnAttributes($gridField, $record, $columnName) {
return array();
}
/**
* Don't add an title
*
* @param GridField $gridField
* @param string $columnName
* @return array
*/
public function getColumnMetadata($gridField, $columnName) {
if($columnName == 'Actions') {
return array('title' => '');
}
}
/**
* Which columns are handled by this component
*
* @param type $gridField
* @return type
*/
public function getColumnsHandled($gridField) {
return array('Actions');
}
/**
* Which GridField actions are this component handling
*
* @param GridField $gridField
* @return array
*/
public function getActions($gridField) {
return array('unlinkrelation');
}
/**
*
* @param GridField $gridField
* @param DataObject $record
* @param string $columnName
* @return string - the HTML for the column
*/
public function getColumnContent($gridField, $record, $columnName) {
$field = new GridField_Action(
$gridField,
'UnlinkRelation'.$record->ID,
_t('GridAction.UnlinkRelation', "Unlink"),
"unlinkrelation",
array('RecordID' => $record->ID)
);
$output = $field->Field();
return $output;
}
/**
* Handle the actions and apply any changes to the GridField
*
* @param GridField $gridField
* @param string $actionName
* @param mixed $arguments
* @param array $data - form data
* @return void
*/
public function handleAction(GridField $gridField, $actionName, $arguments, $data) {
$id = $arguments['RecordID'];
$item = $gridField->getList()->byID($id);
if(!$item) return;
if($actionName == 'unlinkrelation') {
$gridField->getList()->remove($item);
}
}
}