Can the the default conditions operator be changed from OR to AND on the Taggable extension? - yii

Question

$tagged = Os :: model()-> withTags("windows, windows7, windowsXp")-> find();
I want to retrieve the records that are tagged with any of the following
windows, windows7, windowsXp.
By default the tags are generating a condition which are AND-ed. I want to use the OR operator for the tags. So if the record contains windows, windows7 but not windowsXp it won't be retrieved.
I've managed to find a workaround, by editing the getFindByTagsCriteria() in the ETaggableBehavior.php that comes in the extension folder.
/**
* Get criteria to limit query by tags.
* #access private
* #param array $tags
* #return CDbCriteria
*/
protected function getFindByTagsCriteria($tags) {
$criteria = new CDbCriteria();
$pk = $this->getOwner()->tableSchema->primaryKey;
if(!empty($tags)){
$conn = $this->getConnection();
$criteria->select = 't.*';
if(count($tags) >0){
$criteria -> join .= "
JOIN {$this->getTagBindingTableName()} bt
ON t.{$pk} = bt.{$this->getModelTableFkName()}
JOIN {$this->tagTable} tag0
ON tag0.{$this->tagTablePk} = bt.{$this->tagBindingTableTagId} AND (";
for($i = 0, $count = count($tags); $i < $count; $i++){
$tag = $conn->quoteValue($tags[$i]);
$criteria->join .= " tag0.`{$this->tagTableName}` = $tag OR";
}
$criteria -> join = rtrim($criteria -> join, "OR");
$criteria -> join .= ")";
}
}
if($this->getScopeCriteria()){
$criteria->mergeWith($this->getScopeCriteria());
}
return $criteria;
}
I would really appreciate any other way without having to modify the plugin itself.

Answer 1

What I'd do here is set the withTags() method in your model to take an array value, for example something like this:
/**
* #param array $tags List of tags to search for
* #return named scope
*/
public function withTags($tags)
{
$condition = '1';
$params = array();
foreach($tags as $key=>$value)
{
$condition.=' OR tag = :tag'.$key;
$params[':tag'.$key] = $value;
}
$this->getDbCriteria()->mergeWith(array(
'condition'=>$condition,
'params'=>$params,
));
return $this;
}
This way you should be able to call your named scope like so:
$tags = array('windows', 'windows7', 'windowsXp'),
$tagged = Os::model()->withTags($tags)->findAll();

Answer 2

Sam from Yii development team helped me solve this by adding two more functions to the ETaggableBehavior.php
/**
* Get criteria to limit query to match any of tags specified
* #access private
* #param array $tags
* #return CDbCriteria
*/
protected function getFindByAnyTagsCriteria($tags) {
$criteria = new CDbCriteria();
$pk = $this->getOwner()->tableSchema->primaryKey;
if(!empty($tags)){
$conn = $this->getConnection();
foreach($tags as &$tag) {
$tag = $conn->quoteValue($tag);
}
unset($tag);
$tags = implode(', ', $tags);
$criteria->select = 't.*';
$criteria->join .=
"JOIN {$this->getTagBindingTableName()} bt ON t.{$pk} = bt.{$this->getModelTableFkName()}
JOIN {$this->tagTable} tag ON tag.{$this->tagTablePk} = bt.{$this->tagBindingTableTagId} AND tag.`{$this->tagTableName}` IN ($tags)";
}
}
if($this->getScopeCriteria()){
$criteria->mergeWith($this->getScopeCriteria());
}
return $criteria;
}
/**
* Limit current AR query to have any of tags specified.
* #param string|array $tags
* #return CActiveRecord
*/
public function taggedWithAnyOf($tags) {
$tags = $this->toTagsArray($tags);
if(!empty($tags)){
$criteria = $this->getFindByAnyTagsCriteria($tags);
$this->getOwner()->getDbCriteria()->mergeWith($criteria);
}
return $this->getOwner();
}