/**
* Gets an array of ArticleAuthor objects which contain a foreign key that references this object.
*
* If this collection has already been initialized with an identical Criteria, it returns the collection.
* Otherwise if this Author has previously been saved, it will retrieve
* related ArticleAuthors from storage. If this Author is new, it will return
* an empty collection or the current collection, the criteria is ignored on a new object.
*
* @param PropelPDO $con
* @param Criteria $criteria
* @return array ArticleAuthor[]
* @throws PropelException
*/
public function getArticleAuthors($criteria = null, PropelPDO $con = null)
{
if ($criteria === null) {
$criteria = new Criteria(AuthorPeer::DATABASE_NAME);
} elseif ($criteria instanceof Criteria) {
$criteria = clone $criteria;
}
if ($this->collArticleAuthors === null) {
if ($this->isNew()) {
$this->collArticleAuthors = array();
} else {
$criteria->add(ArticleAuthorPeer::AUTHOR_ID, $this->id);
ArticleAuthorPeer::addSelectColumns($criteria);
$this->collArticleAuthors = ArticleAuthorPeer::doSelect($criteria, $con);
}
} else {
// criteria has no effect for a new object
if (!$this->isNew()) {
// the following code is to determine if a new query is
// called for. If the criteria is the same as the last
// one, just return the collection.
$criteria->add(ArticleAuthorPeer::AUTHOR_ID, $this->id);
ArticleAuthorPeer::addSelectColumns($criteria);
if (!isset($this->lastArticleAuthorCriteria) || !$this->lastArticleAuthorCriteria->equals($criteria)) {
$this->collArticleAuthors = ArticleAuthorPeer::doSelect($criteria, $con);
}
}
}
$this->lastArticleAuthorCriteria = $criteria;
return $this->collArticleAuthors;
}
/**
* Retrieve object using using composite pkey values.
* @param int $article_id
* @param int $author_id
* @param PropelPDO $con
* @return ArticleAuthor
*/
public static function retrieveByPK($article_id, $author_id, PropelPDO $con = null)
{
$key = serialize(array((string) $article_id, (string) $author_id));
if (null !== ($obj = ArticleAuthorPeer::getInstanceFromPool($key))) {
return $obj;
}
if ($con === null) {
$con = Propel::getConnection(ArticleAuthorPeer::DATABASE_NAME, Propel::CONNECTION_READ);
}
$criteria = new Criteria(ArticleAuthorPeer::DATABASE_NAME);
$criteria->add(ArticleAuthorPeer::ARTICLE_ID, $article_id);
$criteria->add(ArticleAuthorPeer::AUTHOR_ID, $author_id);
$v = ArticleAuthorPeer::doSelect($criteria, $con);
return !empty($v) ? $v[0] : null;
}