select * from `feeds` where not exists (select * from `black_lists` where `feeds`.`user_id` = `black_lists`.`target_id` and `user_id` = ?)
FeedModel
->whereDoesntHave('blacks', function ($query) use ($user) {
    $query->where('user_id', $user);
})
->get()；

laravel whereDoesntHave 随笔

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