php - 显示 2 个表中的数据 - 此集合实例上不存在属性 [名称]

Question

我尝试显示表 Course 和 Test 中的数据，关系是一对多。

course name   | test name  
___________________________
course name1  | test name 1     
course name2  | test name 2

等等

public $table = 'Course';

public function test()
{
    return $this->hasMany('App\Test');
}


public $table = 'Test';

protected $fillable = ['name',];

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

测试 Controller .php

public function courses() {

 $courses = Course::with(['test'])->get();,
 return view('admin.test.list_course', [
              'courses' => $courses,

         ]);
 }

list_course.blade.php

 @foreach($courses as $course)

        <tr>
            <td>
                {{ $course->name }}
            </td>

            <td>
             {{ $course->test->name }}
            </td>         

        </tr>
    @endforeach

我收到错误

Property [name] does not exist on this collection instance

请问有人知道错误在哪里吗？谢谢!!

Answer 1

您的test类(class)模型上的关系是一对多关系，这意味着每门类(class)可以有多个测试，因此该关系将返回 collection属于该类(class)的所有测试。要在 View 中显示它，您可以循环遍历所有测试:

@foreach($courses as $course)
    <tr>
        <td>
            {{ $course->name }}
        </td>
        <td>
            @foreach($course->test as $test)
                {{ $test->name }} <br>
            @endforeach
        </td>
    </tr>
@endforeach