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Laravel 8:试图获取非对象错误的属性“名称”

[英]Laravel 8: Trying to get property 'name' of non-object error

我正在使用 Laravel 8 开发我的论坛项目。 所以我创建了一个名为answers的表,这里是 Migration :

public function up()
    {
        Schema::create('answers', function (Blueprint $table) {
            $table->id();
            $table->text('answer');
            $table->foreignId('user_id')->constrained()->onDelete('cascade');
            $table->foreignId('question_id')->constrained()->onDelete('cascade');
            $table->timestamps();
        });
    }

然后为了在Question Model 和Answer Model 之间建立关系,我添加了这些:

Question.php:

public function answers()
    {
        return $this->hasMany(Answer::class);
    }

用户.php:

public function answers()
    {
        return $this->hasMany(Answer::class);
    }

之后,我添加了这个来显示问题信息:

@foreach($show->answers as $ans)
<table class="table table-striped table-bordered table-responsive-lg">
    <thead class="thead-light">
        <tr>
            <th scope="col"></th>
            <th scope="col">Answer</th>
        </tr>
    </thead>
    <tbody>
        <tr></tr>
        <tr>
            <td style="text-align:right">
                <div><span>Writer: </span><a href="">{{ $ans->id->name }}</a></div>
            </td>
            <td style="text-align:right">
                <p>
                    {{ $ans->answer }}
                </p>
            </td>
        </tr>
    </tbody>
</table>
 @endforeach

但现在我得到这个错误:

ErrorException 试图获取非对象的属性“名称”

那么这里出了什么问题呢? 如何正确返回提出问题的用户的姓名?

如果您对此有任何想法或建议,我将不胜感激,

谢谢。

更新#1:

捕获

更新#2:

class Answer extends Model
{
    protected $fillable = ['answer', 'user_id', 'question_id'];

}

您应该在 Answer model 中建立 Answer an User 模型之间的关系:

class Answer extends Model
{
    protected $fillable = ['answer', 'user_id', 'question_id'];

   public function user()
    {
        return $this->belongsTo(User::class);
    }

  public function question()
    {
        return $this->belongsTo(Question::class);
    }
}

在您的刀片中,假设 $ans 是 Answer model 的一个实例,您可以使用:

{{ $ans->user->name }}
$table->foreign('user_id')->references('id')->on('users')->constrained()->onDelete('cascade');

$table->foreign('question_id')->references('id')->on('questions')->constrained()->onDelete('cascade');

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