doctrine / orm

    /**

     * {@inheritDoc}

     */

    public function contains(PersistentCollection $collection, $element)

    {

        if ( ! $this->isValidEntityState($element)) {

            return false;

        }

        list($quotedJoinTable, $whereClauses, $params, $types) = $this->getJoinTableRestrictions($collection, $element, true);

        $sql = 'SELECT 1 FROM ' . $quotedJoinTable . ' WHERE ' . implode(' AND ', $whereClauses);

        return (bool) $this->conn->fetchColumn($sql, $params, 0, $types);

    }

    /**

     * {@inheritDoc}

    /**

     * {@inheritDoc}

     */

    public function removeElement(PersistentCollection $collection, $element)

    {

        if ( ! $this->isValidEntityState($element)) {

            return false;

        }

        list($quotedJoinTable, $whereClauses, $params, $types) = $this->getJoinTableRestrictions($collection, $element, false);

        $sql = 'DELETE FROM ' . $quotedJoinTable . ' WHERE ' . implode(' AND ', $whereClauses);

        return (bool) $this->conn->executeUpdate($sql, $params, $types);

    }

    /**

     * {@inheritDoc}