Laravel $posts>comments()不在这里工作

Question

下面是我的模型的代码：

models/Book.php

类图书扩展\雄辩{ 函数Post(){返回$this->hasMany('Post')；}函数用户(){返回$this->归属于(‘User’)；}公共函数覆盖(){返回$this->变形Image(‘Image’，'imageable')；}公共函数删除(){$this->Post()->comments()->delete()；$this->Post()->delete()；$this->->delete()；$this->->delete()；//删除模型返回父程序：：delete ()；} }

models/Post.php

类邮政扩展雄辩{ 函数book() {返回$this->归属到(‘Book’)；}函数注释(){返回$this->hasMany(‘注释’)；}函数用户(){返回$this->归属到(‘User’)；}公共函数删除(){$this->注释(->delete()；//删除模型返回父级：：delete()；} }

models/Comment.php

类注释扩展了雄辩的{ 函数post() {返回$this->归属到(‘Post’)；}函数user() {返回$this->归属到(‘User’)；} }

但在我的UserController.php中，我无法访问我的评论。我试着用这些代码：

公共函数显示($id){ $user =user：：$user($id)；$posts = Post::whereUserId($user->id) ->orderBy('created_at'，'deac')->get()；$comments =$Post->注释()；dd($comments)}；

这句话总是说：

​

如何访问我在帖子下的评论？而且，我不认为$this->posts()->comments()->delete();不起作用。

Answer 1

在User模型中添加如下关系：

// User model
public function books()
{
    return $this->hasMany('Book');
}

然后在你的controller

public function show($id)
{
    // User->hasMany:books->hasMany:posts->hasMany:Comments
    $user = User::with('books.posts.comments')->find($id);
    return View::make('viewName')->with('user', $user);
}

然后在你的view

{{ $user->nameMaybe }}
{{ $user->emailMaybe }}
@foreach($user->books as $book)
    {{ $book->title }}
    {{ $book->author }}
    @foreach($book->posts as $post)
        {{ $post->slugMaybe }}
        {{ $post->postTitleMaybe }}
        @foreach($post->comments as $comment)
            {{ $comment->commenttextMaybe }}
        @endforeach
    @endforeach
@endforeach

返回的User模型的结构如下(根据您的关系)：

Model: User (object)
           ->name (Property of User Model)
           ->email (Property of User Model) and more properties
           -> books (property of User Model, collection of Book Models
              -> [0] Book (has properties)
              -> [1] Book (has properties
                 -> posts (property of [1]Book, collection of Post Models
                 -> [0] Post (has properties)
                 -> [1] Post (has properties
                    -> comments (property of [1]Post, collection of Comment Models
                    -> [0] Comment (has properties)
                    -> [1] Comment (has properties