无法从模型关系 Laravel 中获取属性

Question

当我在 1 个视图中使用具有 3 个模型的 fooreach 循环时遇到问题

这是我的Thread 模型

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Thread extends Model
{
    protected $primaryKey = "id_threads";

    public function user(){
    
        return $this->belongsTo('App\User','id_users');
    }

    protected $fillable = [
        'id_users', 'threads',
    ];

    public function comment(){
        return $this->hasMany('App\Comment','id_threads');
    }
        
}

这是我的Comment 模型

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Comment extends Model
{
    protected $primaryKey = 'id_comments';

    public function thread(){
        return $this->belongsTo('App\Thread','id_threads');
    }

    public function users(){
        return $this->belongsTo('App\User');
    }

    protected $fillable = [
        'id_threads', 'id_users', 'comments','status'
    ];
}

这是我的index 控制器

    public function index()
    {
        $user = Auth::user();
        $comment = Comment::all();
        
        //Threads
        $threads = Thread::orderBy('created_at','desc')
        ->get();
        $hitung = $threads->where('id_users', '=',$user->id);
        
        
        return view('/home',compact('threads','hitung','comment'));
    }

这是我的view

@foreach ($threads as $thread)
    <div class="media-body">
        <h5 class="mb-0">{{$thread->user->name}}</h5>
            <div class="card-date mb-2">
                {{date('F d, Y', strtotime($thread->created_at))}} at {{date('g : ia', strtotime($thread->created_at))}}
            </div>
        <input type="hidden" name="$id_threads" value="{{$thread->id_threads}}">
            {{$thread->threads}}
            <div class="card-delete mt-5">
                @if (Auth::user()->id==$thread->id_users)
                <a href="">Delete</a>
                @else
                
                @endif
            </div>
            <hr>
            <div class="media comment mt-3">
                <a class="mr-3" href="#">
                    {{$thread->comment->comments}}

当我想显示评论时出现错误

{{$thread->comment->comments}}

然后出现这样的错误

Property [comments] does not exist on this collection instance. (View: D:\Jendro\Project Laravel\projectCO\resources\views\home.blade.php)

但是当我只调用对象时，像这样

{{$thread->comment}}

没有出现错误，在我看来，Comment 模型中出现了一个数据集

[{"id_comments":6,"id_threads":54,"id_users":2,"comments":"asdqweasd","created_at":"2020-06-29 08:58:53","updated_at":"2020-06-29 08:58:53","status":"comment"}] 

调用用户对象的时候也是这样，但是调用用户对象的属性时用户对象没有问题

我被这个问题卡住了，有人有解决这个问题的方法吗？

Answer 1

您将无法通过这种方式访问​​，因为这很麻烦。不是一条记录，而是一组记录。你需要扭动 $ thread->cmets 并从中获取 cmets。

但如果 $ thread->comment 应该始终是单个条目，则在 Thread 类中使用 hasOne 而不是 hasMany