视图未返回存储在数据库中的属性

Question

我正在尝试 return 哪个用户发表了评论，以及他们发表评论的时间。

我有模型求评论

use Illuminate\Database\Eloquent\Model;

    class comments extends Model
    {
        protected $guarded = [];

        public function adjustments()
        {
            return $this->belongsToMany(User::class, 'adjustments')
            ->withTimestamps();
        }
    }

跟踪哪些用户发布了哪些评论的枢轴table

public function up()
{
    Schema::create('adjustments', function (Blueprint $table) {
        $table->increments('id');
        $table->unsignedInteger('user_id')->index();
        $table->unsignedInteger('comments_id')->index();
        $table->timestamps();
    });
}

空调整模型

use Illuminate\Database\Eloquent\Model;

class adjustment extends Model
{
    //
}

在 php artisan tinker 中，当 $comment = App\comment::first(); 和 $user = App\user::first(); 我能够使用 $comment->adjustments()->attach($user->id) 成功地将 user_id 附加到 comment_id 并且调用 App\adjustments::all(); 将正确 return

=> Illuminate\Database\Eloquent\Collection {#2935
     all: [
       App\adjustment {#2941
         id: 1,
         user_id: 1,
         comments_id: 1,
         created_at: "2019-11-16 17:05:10",
         updated_at: "2019-11-16 17:05:10",
       },
     ],
   }

当我试图在我的视图中显示调整时，我得到一个空列表。

  @foreach ($comment->adjustments as $user)
        <li>{{$user->name}} on {{$user->pivot->updated_at}}</li>
    @endforeach

在我的产品控制器中（用户对产品发表评论）我的展示功能中有以下代码

public function show(products $product, comments $comment, User $user)
{
    return view ('products.show', compact('product'), compact('comment'));
}

Answer 1

这里不需要枢轴table。因为在这里你有一对多的关系。用户可以创建许多评论。 & 一个评论属于一个 user.In 用户模型添加这个

public function comments()
{
return $this->hasMany(Comment::class);
}

& 评论 table 你有外键 user_id.

在评论模型中

public function user()
{
    return $this->belongsTo(User::class,'user_id','id')
}

public function show(products $product, comments $comment, User $user)
{
    $comments=Comment::with('user')->all();
    return view ('products.show', compact(['product','comments']));
}

@foreach ($comments as $comment)
        <li>{{$comment->user->name}} on {{$comment->updated_at}}</li>
    @endforeach

然后你可以访问一个用户的所有评论table数据

视图未返回存储在数据库中的属性

View is not returning attributes stored in database

laravel

eloquent

laravel-5

laravel-6