此集合实例 Laravel 关系上不存在属性 [X] [英] Property [X] does not exist on this collection instance laravel relationship

问题描述

我在 laravel 5.6 中使用了很多属性，当我添加 $phonebooks 时，我看到所有关系都正常工作，一切都很好，但是当我尝试在视图中显示它们时，我得到属性的错误不存在在这个集合上这是关系代码

公共函数client() {返回 $this->hasMany('App\Client','id', 'client_id');}

这里是控制器

公共函数 index(){ $phonebooks = Phonebook::with('client')->get();return view('admin.phonebooks.index',compact('phonebooks',$phonebooks));}

最后这是我如何尝试在视图中显示它们

@foreach($phonebooks as $phonebook)<tr><th scope="row">{{$phonebook->id}}</th><th scope="row">{{$phonebook->title}}</th><td><a href="/admin/phonebooks/{{$phonebook->id}}">{{$phonebook->description}}</a></td><td>{{$phonebook->calldate}}</td><td>{{$phonebook->created_at->toFormattedDateString()}}</td><td>{{ $phonebook->client->title}}</td><td><div class="btn-group" role="group" aria-label="基本示例"><a href="{{ URL::to('admin/phonebooks/' . $phonebook->id .'/edit') }}"><button type="button" class="btn btn-warning">ویراییش</button></a>&nbsp;<form action="{{url('admin/phonebooks', [$phonebook->id])}}" method="POST"><input type="hidden" name="_method" value="DELETE"><input type="hidden" name="_token" value="{{ csrf_token() }}"><input type="submit" class="btn btn-danger" value="حذف"/></表单>

</td></tr>@endforeach</tbody>

这里是 dd 的结果只是其中的一部分

集合 {#630 ▼ #items: array:3 [▼0 =>电话簿{#572 ▼#fillable: 数组:5 [▶]#connection: "mysql"#table: 空#primaryKey: "id"#keyType: "int"+递增:真#和: []#withCount: []#每页:15+存在:真实+wasRecentlyCreated: 假#attributes: 数组:8 [▶]#original: 数组:8 [▶]#变化: []#casts: []#日期: []#dateFormat:空#appends: []#dispatchesEvents: []#observables: []#关系:数组:1 [▼客户" =>收藏{#627 ▼#it​​ems: 数组:1 [▼0 =>客户{#621 ▼#connection: "mysql"#table: 空#primaryKey: "id"#keyType: "int"+递增:真#和: []#withCount: []#每页:15+存在:真实+wasRecentlyCreated: 假#attributes:数组:16 [▼身份证"=>1

然后就这样下去了.

解决方案

问题是这一行:

{{ $phonebook->client->title}}

在你看来.

您已将关系设置为 hasMany 关系，这将返回模型集合.

如果您执行 dd($phonebook->client)，它将返回一个集合，而不是单个模型.

它试图调用集合对象上的属性 title，而不是模型.

您需要将关系定义更改为 hasOne()，或者执行以下操作:

{{ $phonebook->client->first()->title }}

(或替代):

{{ $phonebook->client->get(0)->title }}

i am using has many realtions in laravel 5.6 and when i dd the $phonebooks i see all the relations are working properly and every thing is fine but when i try to show them in view i get the error of property does not exist on this collection here is the relation code

public function client() {
    return $this->hasMany('App\Client','id' , 'client_id');
}

and here is controller

public function index()
{    $phonebooks = Phonebook::with('client')->get();

    return view('admin.phonebooks.index',compact('phonebooks',$phonebooks));
}

and finally here is how i try to show them in view

<tbody>
@foreach($phonebooks as $phonebook)
    <tr>
        <th scope="row">{{$phonebook->id}}</th>
        <th scope="row">{{$phonebook->title}}</th>
        <td><a href="/admin/phonebooks/{{$phonebook->id}}">{{$phonebook->description}}</a></td>
        <td>{{$phonebook->calldate}}</td>
        <td>{{$phonebook->created_at->toFormattedDateString()}}</td>

        <td>{{ $phonebook->client->title}}</td>
        <td>
            <div class="btn-group" role="group" aria-label="Basic example">
                <a href="{{ URL::to('admin/phonebooks/' . $phonebook->id . '/edit') }}">
                    <button type="button" class="btn btn-warning">ویراییش</button>
                </a>&nbsp;
                <form action="{{url('admin/phonebooks', [$phonebook->id])}}" method="POST">
                    <input type="hidden" name="_method" value="DELETE">
                    <input type="hidden" name="_token" value="{{ csrf_token() }}">
                    <input type="submit" class="btn btn-danger" value="حذف"/>
                </form>
            </div>
        </td>
    </tr>
@endforeach
</tbody>

and here is the result of dd just a part of it

Collection {#630 ▼  #items: array:3 [▼
0 => Phonebook {#572 ▼
  #fillable: array:5 [▶]
  #connection: "mysql"
  #table: null
  #primaryKey: "id"
  #keyType: "int"
  +incrementing: true
  #with: []
  #withCount: []
  #perPage: 15
  +exists: true
  +wasRecentlyCreated: false
  #attributes: array:8 [▶]
  #original: array:8 [▶]
  #changes: []
  #casts: []
  #dates: []
  #dateFormat: null
  #appends: []
  #dispatchesEvents: []
  #observables: []
  #relations: array:1 [▼
    "client" => Collection {#627 ▼
      #items: array:1 [▼
        0 => Client {#621 ▼
          #connection: "mysql"
          #table: null
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #attributes: array:16 [▼
            "id" => 1

and is goes down just like this .

解决方案

The problem is this line:

{{ $phonebook->client->title}}

In your view.

You've setup your relationship as a hasMany relationship, which will return a collection of models.

If you do dd($phonebook->client), it'll return a collection, not a single model.

It's trying to call the property title on a collection object, not a model.

You need to change the relationship definiation to a hasOne(), OR do something like:

{{ $phonebook->client->first()->title }}

(or alternatively):

{{ $phonebook->client->get(0)->title }}

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