Try to fix double {{}} in the ActiveQuery::joinWithRelation()

[Mirocow]

private function joinWithRelation($parent, $child, $joinType)
{
    $via = $child->via;
    $child->via = null;
    if ($via instanceof ActiveRelation) {
        // via table
        $this->joinWithRelation($parent, $via, $joinType);
        $this->joinWithRelation($via, $child, $joinType);
        return;
    } elseif (is_array($via)) {
        // via relation
        $this->joinWithRelation($parent, $via[1], $joinType);
        $this->joinWithRelation($via[1], $child, $joinType);
        return;
    }

    $parentTable = $this->getQueryTableName($parent);
    $childTable = $this->getQueryTableName($child);

    if (!empty($child->link)) {

        // Clean if need
        $parentTableLink = preg_replace('/\\{\\{(.*?)\\}\\}/', '\1', $parentTable);
        $childTableLink = preg_replace('/\\{\\{(.*?)\\}\\}/', '\1', $childTable);            

        $on = [];
        foreach ($child->link as $childColumn => $parentColumn) {
            $on[] = '{{' . $parentTableLink . "}}.[[$parentColumn]] = {{" . $childTableLink . "}}.[[$childColumn]]";
        }
        $on = implode(' AND ', $on);
    } else {
        $on = '';
    }
    $this->join($joinType, $childTable, $on);


    if (!empty($child->where)) {
        $this->andWhere($child->where);
    }
    if (!empty($child->having)) {
        $this->andHaving($child->having);
    }
    if (!empty($child->orderBy)) {
        $this->addOrderBy($child->orderBy);
    }
    if (!empty($child->groupBy)) {
        $this->addGroupBy($child->groupBy);
    }
    if (!empty($child->params)) {
        $this->addParams($child->params);
    }
    if (!empty($child->join)) {
        foreach ($child->join as $join) {
            $this->join[] = $join;
        }
    }
    if (!empty($child->union)) {
        foreach ($child->union as $union) {
            $this->union[] = $union;
        }
    }
}

}

[qiangxue]

Thanks!