Laravel Eloquent -总在哪里

Question

在 Laravel 4.2 中，我试图实现一个查询，该查询返回具有所有特定事件的所有用户。到目前为止，我有一个查询，该查询返回具有许多事件之一的所有用户:

//$selectedActivities being an array
        $userByActivities = User::with('activities')
                ->whereHas('activities', function($query) use($selectedActivities){
                    $query->whereIn('id', $selectedActivities);
                })->get();

更明确地说:给定事件a，b，c。我正在寻找所有具有事件“a AND b AND c”的用户。我的查询返回所有事件为a或b或c的用户。

感谢您的帮助。

编辑:

lukasgeiter提供的解决方案导致以下查询:

select * from `users` where 
        (select count(*) from `activities` inner join `activity_user` on `activities`.`id` = `activity_user`.`activity_id` where `activity_user`.`user_id` = `users`.`id` and `id` = '7') >= 1 
        and (select count(*) from `activities` inner join `activity_user` on `activities`.`id` = `activity_user`.`activity_id` where `activity_user`.`user_id` = `users`.`id` and `id` = '3') >= 1 
        and (select count(*) from `activities` inner join `activity_user` on `activities`.`id` = `activity_user`.`activity_id` where `activity_user`.`user_id` = `users`.`id` and `id` = '1') >= 1 
        and (select count(*) from `activities` inner join `activity_user` on `activities`.`id` = `activity_user`.`activity_id` where `activity_user`.`user_id` = `users`.`id` and `id` = '2') >= 1

而 Jarek Tkaczyk提供的解决方案:

$userByActivities = User::with('activities')
 ->whereHas('activities', function($query) use($selectedActivities) {
     $query->selectRaw('count(distinct id)')->whereIn('id', $selectedActivities);
 }, '=', count($selectedActivities))->get();

对于类似的请求，将导致以下查询:

select * from `users` where (select count(distinct id) from `activities` 
    inner join `activity_user` on `activities`.`id` = `activity_user`.`activity_id` 
    where `activity_user`.`user_id` = `users`.`id` and `id` in ('7', '3', '1', '2')) = 4

Answer 1

您必须为此添加多个whereHas:

$query = User::with('activities');
foreach($selectedActivities as $activityId){
    $query->whereHas('activities', function($q) use ($activityId){
        $q->where('id', $activityId);
    });
}
$userByActivities = $query->get();