mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-06-28 07:29:26 +02:00
ddcfcf7bed
Cleanup of framework's use of @package and @subpackage labels and additional of labels for classes missing packages. Moved all GridField related components to the one name. Countless spelling fixes, grammar for other comments. Link ClassName references in file headers.
106 lines
2.8 KiB
PHP
106 lines
2.8 KiB
PHP
<?php
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/**
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* Subclass of {@link DataList} representing a has_many relation.
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*
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* @package framework
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* @subpackage model
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*/
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class HasManyList extends RelationList {
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protected $foreignKey;
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/**
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* Create a new HasManyList object.
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* Generation of the appropriate record set is left up to the caller, using the normal
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* {@link DataList} methods. Addition arguments are used to support {@@link add()}
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* and {@link remove()} methods.
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*
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* @param $dataClass The class of the DataObjects that this will list.
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* @param $relationFilters A map of key => value filters that define which records
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* in the $dataClass table actually belong to this relationship.
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*/
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public function __construct($dataClass, $foreignKey) {
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parent::__construct($dataClass);
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$this->foreignKey = $foreignKey;
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}
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protected function foreignIDFilter($id = null) {
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if ($id === null) $id = $this->getForeignID();
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// Apply relation filter
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if(is_array($id)) {
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return "\"$this->foreignKey\" IN ('" .
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implode("', '", array_map('Convert::raw2sql', $id)) . "')";
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} else if($id !== null){
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return "\"$this->foreignKey\" = '" .
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Convert::raw2sql($id) . "'";
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}
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}
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/**
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* Adds the item to this relation.
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*
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* It does so by setting the relationFilters.
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*
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* @param $item The DataObject to be added, or its ID
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*/
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public function add($item) {
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if(is_numeric($item)) {
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$item = DataObject::get_by_id($this->dataClass, $item);
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} else if(!($item instanceof $this->dataClass)) {
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user_error("HasManyList::add() expecting a $this->dataClass object, or ID value", E_USER_ERROR);
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}
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$foreignID = $this->getForeignID();
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// Validate foreignID
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if(!$foreignID) {
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user_error("ManyManyList::add() can't be called until a foreign ID is set", E_USER_WARNING);
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return;
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}
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if(is_array($foreignID)) {
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user_error("ManyManyList::add() can't be called on a list linked to mulitple foreign IDs", E_USER_WARNING);
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return;
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}
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$fk = $this->foreignKey;
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$item->$fk = $foreignID;
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$item->write();
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}
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/**
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* Remove an item from this relation.
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*
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* Doesn't actually remove the item, it just clears the foreign key value.
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*
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* @param $itemID The ID of the item to be removed.
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*/
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public function removeByID($itemID) {
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$item = $this->byID($itemID);
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return $this->remove($item);
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}
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/**
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* Remove an item from this relation.
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* Doesn't actually remove the item, it just clears the foreign key value.
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* @param $item The DataObject to be removed
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* @todo Maybe we should delete the object instead?
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*/
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public function remove($item) {
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if(!($item instanceof $this->dataClass)) {
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throw new InvalidArgumentException("HasManyList::remove() expecting a $this->dataClass object, or ID",
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E_USER_ERROR);
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}
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$fk = $this->foreignKey;
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$item->$fk = null;
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$item->write();
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}
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}
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