/**
* Join on middle table of a many-to-many relation.
*
* @param ManyMany $rel The relation.
* @param string $cmAlias The current model alias.
* @param int $joinType
*/
protected function _addJoinClauseManyMany(ManyMany $rel, $cmAlias, $joinType)
{
// $md stands for "middle".
$mdTable = $rel->getMiddleTableName();
$mdAlias = $rel->getMiddleTableAlias();
$mdAlias = $cmAlias === self::DEFAULT_ROOT_ALIAS ? $mdAlias : $cmAlias . '.' . $mdAlias;
$jcMiddle = new JoinClause($mdTable, $mdAlias, $joinType);
$jcMiddle->on($cmAlias, $rel->cm->column, $mdAlias, $rel->jm->from);
$this->setJoinClause($mdAlias, $jcMiddle);
return $mdAlias;
}
public function testWhereRelation()
{
$b = new WhereBuilder();
$b->root('Article', 'articles');
$b->whereRelation(Blog::relation('articles'), '_');
$components = $b->build();
$where[] = ['type' => 'Attribute', 'lTable' => 'articles', 'lCols' => ['blog_id'], 'op' => '=', 'rTable' => '_', 'rCols' => ['id'], 'logic' => 'AND'];
$this->assertEquals($where, $components['where']);
$this->assertEquals(Blog::table(), $b->getInvolvedTable('_'));
// - - -
// With many-to-many relation.
$rel = Article::relation('readers');
$mdName = $rel->getMiddleTableName();
$mdAlias = $rel->getMiddleTableAlias();
$b = new WhereBuilder();
$b->root('User', 'readers');
$b->whereRelation($rel, '_');
$components = $b->build();
$jc = new JoinClause($mdName, $mdAlias);
$jc->on('readers', 'id', $mdAlias, 'user_id');
$where = [['type' => 'Attribute', 'lTable' => $mdAlias, 'lCols' => ['article_id'], 'op' => '=', 'rTable' => '_', 'rCols' => ['id'], 'logic' => 'AND']];
$this->assertEquals($where, $components['where']);
$this->assertEquals(Article::table(), $b->getInvolvedTable('_'));
$this->assertEquals($jc, $b->getJoinClause($mdAlias));
try {
$b->getJoinClause('_');
$this->fail('Should have thrown an exception.');
} catch (Exception $ex) {
$this->assertContains('_', $ex->getMessage());
}
}
