Laravel 5查询生成器，复杂的联接（条件AND（条件OR条件））

Question

我需要在Laravel的查询生成器中重现以下查询：

select * from table LEFT JOIN table_b ON `condition` AND (`condition` OR `condition`)

我知道您可以where语句中执行复杂的操作：

Model::where(function ($query) {
  return $query->where("field","value")->orWhere("field","value");
})->where("field","value")->get();

而且我知道您可以on语句进行半复杂化：

->leftJoin('table', function ($join) {
  $join->on("field","=","field_b")
    ->on("field_a","=","field_c");
})

但是我需要on语句中包含condition AND (condition OR condition) 。 如果不执行DB::raw()或等效方法，这可能吗？

Answer 1

用这个：

->leftJoin('table', function ($join) {
    $join->on("field","=","field_b")
        ->on(function($join) {
            $join->on("field_a","=","field_c")
                ->orOn("field_d","=","field_e");
        });
})