在 Laravel 控制器的嵌套 foreach 循环中构建数组

Question

我正在尝试使用 Laravel 控制器中的嵌套 foreach 循环，从长期的雄辩关系中构建一个用户 ID 数组，但无法使其正常工作。用户可以有发布者，这些发布者可以有团队，每个团队都有成员。用户可以在多个团队中，因此我还需要删除重复的 ID。我想以一个计数结束，看看有多少团队成员与用户相关联。在我的用户模型中public function publishers(){    return $this->belongsToMany('App\Publisher')->withTimestamps();}在我的发布者模型中public function teams(){  return $this->belongsToMany('App\Team')->withTimestamps();}在我的团队模型中public function members(){  return $this->belongsToMany('App\User')->withPivot('status', 'title', 'team_role_ids')->withTimestamps();}在我的配置文件控制器中foreach ($user->publishers as $userPublisher) {  foreach ($userPublisher->teams as $publisherTeam) {    $teamUserIds[] = $publisherTeam->members->pluck('id')->toarray();  }}$deDupedIds = array_unique($teamUserIds, SORT_NUMERIC);$idsCount = count($deDupedIds);但是我得到了多个数组，而不仅仅是一个已编译的数组，而且计数不起作用。知道我做错了什么吗？

Answer 1

您正在为每次迭代分配一个新数组$teamUserIds。这就是您获得多个阵列的原因。

$teamUserIds = [];

foreach ($user->publishers as $userPublisher) {

  foreach ($userPublisher->teams as $publisherTeam) {

    $teamUserIds = array_merge($teamUserIds, $publisherTeam->members->pluck('id')->toarray());

  }

}

$deDupedIds = array_unique($teamUserIds, SORT_NUMERIC);

$idsCount = count($deDupedIds);

Answer 2

您正在将 id 数组添加$publisherTeam->members->pluck('id')->toarray();为$teamUserIds. 但你想要做的是mergeids 数组

所以你的代码会是这样的：

foreach ($user->publishers as $userPublisher) {

  foreach ($userPublisher->teams as $publisherTeam) {

    $teamUserIds = array_merge($teamUserIds , $publisherTeam->members->pluck('id')->toarray());

  }

}

$deDupedIds = array_unique($teamUserIds, SORT_NUMERIC);

$idsCount = count($deDupedIds);