Question

我通过执行以下操作获得了一个集合：

<appender name="fileAppender" class="CustomFileAppender">
      <param name="Threshold" value="DEBUG" />
      <param name="append" value="true" />
      <param name="maxFileSize" value="10MB" />
      <param name="maxBackupIndex" value="50" />

      <param name="File" value="./log/${current.folder}-wcss-simulator-${current.date}.log"/>

      <layout class="org.apache.log4j.PatternLayout">
         <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss,SSS}\t %-5p\t [%X{ThreadId}]\t %X{MethodName}\t - %m%n" />
      </layout>
   </appender>

ResponseTemplate.php

public function index(){
    $responseTemplates = ResponseTemplate::with('questions.answers')->get();
    return $responseTemplates;
}

Question.php

class ResponseTemplate extends Model
{
    protected $fillable = ['questions'];

    public function questions(){
        return $this->belongsToMany('App\Question');
    }
}

返回此集合：

class Question extends Model
{

    public $timestamps = false;

    protected $fillable = [
        'title',
        'order'
    ];

    public function responseTemplates(){
        return $this->belongsToMany('App\ResponseTemplate');
    }
}

这正如我所料。

如果我用以下内容替换[ { id:1, questions:[ { id:4, order:999999, title:"*How old are you", pivot:{ response_template_id:1, question_id:4 }, answers:[ { id:1, title:"10+", question_id:4, created_at:null, updated_at:"2017-05-24 09:12:34" }, { id:2, title:"20+", question_id:4, created_at:"2017-05-24 08:40:10", updated_at:"2017-05-24 09:12:34" } ] }, { id:3, order:999999, title:"*Where are you from", pivot:{ response_template_id:1, question_id:3 }, answers:[ { id:17, title:"North", question_id:3, created_at:"2017-05-24 09:11:03", updated_at:"2017-05-24 09:11:11" }, { id:18, title:"South", question_id:3, created_at:"2017-05-24 09:11:19", updated_at:"2017-05-24 09:11:28" } ] } ], created_at:"2017-05-24 15:03:59", updated_at:"2017-05-24 15:03:59" }, { id:10, questions:[ { id:8, order:999999, title:"*How old are you", pivot:{ response_template_id:10, question_id:8 }, answers:[ { id:36, title:"30+", question_id:8, created_at:"2017-05-24 09:53:17", updated_at:"2017-05-24 09:55:17" }, { id:37, title:"40+", question_id:8, created_at:"2017-05-24 09:55:17", updated_at:"2017-05-24 09:55:27" } ] } ], created_at:"2017-05-25 11:13:47", updated_at:"2017-05-25 11:13:47" } ]函数：

index()

我明白了：

$responseTemplates = ResponseTemplate::with('questions.answers')->get();
return $responseTemplates[0];

哪个也正确。

但是如果我回来了

{
    id: 1,
    questions: [
        {
            id: 4,
            order: 999999, // etc

我只是得到一个空字符串。如果我这样做也是如此：

$responseTemplates = ResponseTemplate::with('questions.answers')->get();
return $responseTemplates[0]->questions;

为foreach（）提供的参数无效（查看：

我知道我必须做一些非常愚蠢的事，但不能把手指放在上面。我确信我过去已经完成了这一千次，没有任何问题。

任何人都可以帮助我完成我的第二个foreach声明吗？

奇怪的错误通过嵌套的Laravel集合循环

0 个答案: