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<?php |
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/** |
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* Handles polymorphic relation for commentlist |
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* |
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* Uses elements of PolymorphicHasManyList in 3.2 |
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* |
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* @author dmooyman |
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*/ |
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class CommentList extends HasManyList |
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{ |
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/** |
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* Retrieve the name of the class this relation is filtered by |
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* |
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* @return string |
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*/ |
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public function getForeignClass() |
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{ |
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return $this->dataQuery->getQueryParam('Foreign.Class'); |
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} |
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public function __construct($parentClassName) |
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{ |
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parent::__construct('Comment', 'ParentID'); |
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// Ensure underlying DataQuery globally references the class filter |
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$this->dataQuery->setQueryParam('Foreign.Class', $parentClassName); |
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// For queries with multiple foreign IDs (such as that generated by |
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// DataList::relation) the filter must be generalised to filter by subclasses |
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$classNames = Convert::raw2sql(ClassInfo::subclassesFor($parentClassName)); |
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$this->dataQuery->where(sprintf( |
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"\"BaseClass\" IN ('%s')", implode("', '", $classNames) |
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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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* @param Comment $item The comment to be added |
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*/ |
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public function add($item) |
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{ |
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// Check item given |
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if (is_numeric($item)) { |
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$item = Comment::get()->byID($item); |
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} |
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if (!($item instanceof Comment)) { |
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throw new InvalidArgumentException("CommentList::add() expecting a Comment object, or ID value"); |
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} |
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// Validate foreignID |
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$foreignID = $this->getForeignID(); |
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if (!$foreignID || is_array($foreignID)) { |
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throw new InvalidArgumentException("CommentList::add() can't be called until a single foreign ID is set"); |
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} |
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$item->ParentID = $foreignID; |
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$item->BaseClass = $this->getForeignClass(); |
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$item->write(); |
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} |
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/** |
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* Remove a Comment from this relation by clearing the foreign key. Does not actually delete the comment. |
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* |
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* @param Comment $item The Comment to be removed |
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*/ |
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public function remove($item) |
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{ |
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// Check item given |
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if (is_numeric($item)) { |
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$item = Comment::get()->byID($item); |
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} |
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if (!($item instanceof Comment)) { |
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throw new InvalidArgumentException("CommentList::remove() expecting a Comment object, or ID", |
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E_USER_ERROR); |
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} |
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// Don't remove item with unrelated class key |
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$foreignClass = $this->getForeignClass(); |
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$classNames = ClassInfo::subclassesFor($foreignClass); |
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if (!in_array($item->BaseClass, $classNames)) { |
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return; |
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} |
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// Don't remove item which doesn't belong to this list |
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$foreignID = $this->getForeignID(); |
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if (empty($foreignID) |
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|| (is_array($foreignID) && in_array($item->ParentID, $foreignID)) |
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|| $foreignID == $item->ParentID |
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) { |
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$item->ParentID = null; |
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$item->BaseClass = null; |
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$item->write(); |
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} |
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} |
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} |
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silverstripe /
silverstripe-comments
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.