php - 为什么我的收藏在发送时是空的？

Question

我正在使用 Laravel 5，我的 Controller 中有以下方法:

/**
 * Display the specified resource.
 *
 * @param  int $id
 * @return \Illuminate\Http\Response
 */
public function show($id)
{
    $authUser =  Auth::user();
    $sharesList = Group::find($id)->shares->sortByDesc('created_at');
    $groupList = $authUser->groupsAsMember->where('id', '<>', $id);
    $group = $authUser->groups->find($id);
    $postList = Group::find($id)->posted->sortByDesc('created_at');

    $postsGroups = PostGroup::where('group_id', $id)->with('commented')->get();
    //$commentsList;

    foreach ($postsGroups as $postGroup) {
        $commentsList = $postGroup->commented;
        //dd($commentsList);
    }

    //dd($commentsList);
    return view('Pages.Group.detail', ['sharesList' => $sharesList, 'groupList' => $groupList, 'theGroup' => $group, 'postList' => $postList, 'commentsList' => $commentsList]);
}

问题出在$commentsList 集合上，如果我在@foreach 中放置一个dd($commentsList)，我可以看到里面有我想要的元素它，但是如果我将 dd($commentsList) 放在 foreach 之外(@endforeach 之后)$commentsList 是空的并且它到达我的 HTML 页面时是空的，我该如何解决？我尝试将 $commentsList; 放在 @foreach 循环之前，但仍然无法正常工作。

编辑

• 我想如何获取我的数据:https://imgur.com/a/kkMZtQ0
• 我得到的(但我不想要的):https://imgur.com/a/rVgx6wf

Answer 1

当你应该添加一个新的数组元素时，你正在用每个循环覆盖它。试试这个:

/**
 * Display the specified resource.
 *
 * @param  int $id
 * @return \Illuminate\Http\Response
 */
public function show($id)
{
    $authUser =  Auth::user();
    $sharesList = Group::find($id)->shares->sortByDesc('created_at');
    $groupList = $authUser->groupsAsMember->where('id', '<>', $id);
    $group = $authUser->groups->find($id);
    $postList = Group::find($id)->posted->sortByDesc('created_at');
    $commentsList = collect();

    $postsGroups = PostGroup::where('group_id', $id)->with('commented')->get();

    foreach ($postsGroups as $postGroup) {
        foreach($postGroup->commented as $commentPost) {
            $commentsList->push($commentPost);
        }
    }

    //dd($commentsList);
    return view('Pages.Group.detail', ['sharesList' => $sharesList, 'groupList' => $groupList, 'theGroup' => $group, 'postList' => $postList, 'commentsList' => $commentsList]);
}