如何使用 db：：raw 对 laravel fluent 进行更新查询

This is related to one of my question earlier where:

Update table1 field with table2 field value in join laravel fluent

But since this is a different approach now, I will just ask another question:

How do you properly do an update using DB:raw?

我想用内容的值更新favorite_contents.type.输入，但它不做任何事情，静态设置1到favorite_contents.expired正在工作.

这是我的代码，即使使用了DB::raw，也不会更新类型:

$table = 'favorite_contents';
$contents = DB::table($table)
            ->join('contents', function($join) use($table){
                $join->on("$table.content_id", '=', 'contents.id');
            })
            ->whereIn("$table.content_id",$ids)
            ->update(array(
                    "$table.expired" => 1
            ));

DB::raw("UPDATE favorite_contents, contents SET favorite_contents.type = contents.type where favorite_contents.content_id = contents.id");

这是我使用上述代码之前第一个不更新的代码，这些代码也不起作用:

$table = 'favorite_contents';
$contents = DB::table($table)
        ->join('contents', function($join) use($table){
            $join->on("$table.content_id", '=', 'contents.id');
        })
        ->whereIn("$table.content_id",$ids)
        ->update(array(
                "$table.expired" => 1,
                "$table.type" => "contents.type"
        ));

P.S: This is working when done on an sql editor:

UPDATE favorite_contents, contents SET favorite_contents.type = contents.type where favorite_contents.content_id = contents.id