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2014-05-26 11:14
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将一个对象数组分配给Laravel中的另一个对象的键

I am working on a Q&A app in Laravel. Here, I have two migrations or database tables, one is question_bank and second is answer_choices. There is one to many relation between question and answers table. While retrieving a question, I want to retrieve all of the answers which are related with this question.

For this i wrote a method:

public function getQuestion($id){
    $question=QuestionBank::find($id);
    $answers=AnswerBank::where('question_id','=',$id)->get();
    $question->answers=$answers;
        return Response::json($question);
}

The answer_choices migration is : 

class AnswerChoices extends Migration {
public function up()
{
Schema::create('answer_choices', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('question_id')->unsigned();
        $table->mediumtext('answer_text');
        $table->boolean('correct')->nullable();
        $table->foreign('question_id')->references('id')->on('question_bank');
    });
}

public function down()
{
    Schema::drop('answer_choices');
}
}

And the model is : 

<?php

class AnswerBank extends \Eloquent {
protected $fillable = [];
protected $table = "answer_choices";
}

Question model is 

<?php

class QuestionBank extends \Eloquent {
protected $fillable = [];
protected $table = "question_bank";
}

I expected i will get result as question.answers:[{},{},{}]
but on client side I am getting it like "question.answers":{} as a blank object. When I return only $answers, it shows all the answer objects in the array like [{},{},{]].

How can I get the answers objects as an array of objects in JavaScript?

图片转代码服务由CSDN问答提供 功能建议

我正在使用Laravel的Q＆amp; A应用程序。 在这里，我有两个迁移或数据库表，一个是question_bank，第二个是answer_choices。 问答表之间有一对多的关系。 在检索问题时，我想检索与此问题相关的所有答案。

为此，我写了一个方法： 

  public function getQuestion（$ id）{
 $ question = QuestionBank :: find（  $ id）; 
 $ answers = AnswerBank :: where（'question_id'，'='，$ id） - ＆gt; get（）; 
 $ question-＆gt; answers = $ answers; 
 return Response ::  json（$ question）; 
} 
   
 
 
 answer_choices迁移是： 
 
 
  class AnswerChoices extends Migration {  
公共函数up（）
 {
Schema :: create（'answer_choices'，function（Blueprint $ table）{
 $ table-＆gt; increments（'id'）; 
 $ table-＆gt; integer（'  question_id'） - ＆gt; unsigned（）; 
 $ table-＆gt; mediumtext（'answer_text'）; 
 $ table-＆gt; boolean（'correct'） - ＆gt; nullable（）; 
 $ table-＆gt  ; foreign（'question_id'） - ＆gt;引用（'id'） - ＆gt; on（'question_bank'）; 
}）; 
} 
 
公共函数down（）
 
 
 \ {
 
 
 \  drop（'answer_choices'）; 
} 
} 
   
 
 
模型为： 
 
 
 ＆lt  ;？php 
 
class AnswerBank扩展\ Eloquent {
protected $ fillable = []; 
protecte  d $ table =“answer_choices”; 
} 
   
 
 
问题模型是 
 
 
 ＆lt;？php \ 问题解决方案扩展\ Eloquent {
protected $ fillable = []; 
protected $ table =“question_bank”; 
} 
   
 
 
我预计我会得到 结果为 question.answers：[{}，{}，{}]  
 
但是在客户端我得到它像“question.answers”：{} 作为空白对象。 当我只返回 $ answers 时，它会显示数组中的所有答案对象，如 [{}，{}，{]] 。   
 
 
如何在JavaScript中将答案对象作为对象数组？
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3条回答 默认 最新

  • douyuefu1372 2014-05-31 12:16
    最佳回答

    Answer Given by Creator is totally fine just having a small mistake. Corect that and your code will be run.
    Change this function 

    public function answers(){

    return $this->HasMany('AnswerBank','id','question_id');

 }

    to 

    public function answers(){

    return $this->HasMany('AnswerBank','question_id','id');

}

    Replace question_id with id and it will work.
    And return question object with answers like this 

    public function getQuestion($id){  
    $answers=QuestionBank::with('answers')->find($id);
    return Response::json($answers);
}
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