withCount() doesn't include deleted rows?

问题

How can I make withCount('comments') also include all deleted/trashed rows?

For example, if I have 5 comments, and I delete 1, I still expect withCount('comments') to return 5, but instead it's returning 4.

My full query looks something like this:

$query = Post::withTrashed()
    ->withCount('comments')
    ->get();

回答1:

You can use the withTrashed method:

>withTrashed()

回答2:

I think you can try this

$query = Post::withCount('comments')
    ->withTrashed()
    ->get();

OR

$query = DB::table('post')
         ->select('comments', DB::raw('count(*) as comments'))
         ->get();

Hope this work for you!

回答3:

Since laravel doesn't propose a way to filter the relation when using withCount, a clean solution would be to declare the relation and add the withTrashd() to it.

In Post.php

public function commentsWithTrashed()
{
    return $this->comment()->withTrashed();
}

Now you can use the withCount on it.

$query = Post::withTrashed()
    ->withCount('commentsWithTrashed')
    ->get();

来源：https://stackoverflow.com/questions/44551311/withcount-doesnt-include-deleted-rows