Symfony - 为什么我的表单得到表中存在的每一个答案？ [英] Symfony - Why does my form get every answer that exists in the table?

问题描述

这不是一个问题，而是我注意到并希望更好地理解的东西。

我有一个 code> class，其集合投票和 pollOptions 。
我的 PollOption 类有它所属的调查和标题。
投票类也有它所属的 poll 以及自己的 voteChoices 和 user 。
VoteChoice 类有它所属的投票， code>（ PollOption ），以及优先级。

我有一个表单包含一组表单（一个投票与许多 VoteChoice ）

VoteChoiceType 如下

  class VoteChoiceType extends AbstractType 
 {
 public function buildForm（FormBuilderInterface $ builder，array $ options）
 {
 $ builder 
  - > add（'answer'，null，array（'disabled'=> true））
  - > add（'priority'，null）; 
} 
 
 public function configureOptions（OptionsResolver $ resolver）
 {
 $ resolver-> setDefaults（array（
'data_class'=> PollBundle\Entity\VoteChoice'，
））; 
} 
} 
  

现在在我的 VoteController 我创建并填充一个投票与许多 voteChoices ，设置根据当前民意调查的可用选择（来自URL）

  $ vote =新投票（）; 
 $ vote-> setPoll（$ poll）; 
 foreach（$ vote-> getPoll（） - > getPollOptions（）as $ op）{
 $ vc = New VoteChoice（）; 
 $ vote-> addVoteChoice（$ vc-> setAnswer（$ op））; 
} 
  

所以我的树枝如下

 < ul class =voteChoicesdata-prototype ={{form_widget（form.voteChoices.vars.prototype）| e（'html_attr'）}}> ; 
 {％for formChoice in form.voteChoices％} 
< li> {{voteChoice.vars.value.answer}} {{form_row（voteChoice.priority）}}< / li> 
 {％endfor％} 
< / ul> 
< / div> 
< p>< button type =submitclass =btn btn-success> Go！< / button>< / p> 
 {{form_end（form）}} 
  

但是，如果我启用答案在我的 VotechoiceType 中，在我的枝条包括 {{form_row（voteChoice.answer）}} 我注意到所有我的投票选项与可选列表中的表格相同，即使它们是另一个投票。

VoteChoice 和 PollOption 之间的关系（很多到一个）。如果我在这里犯了一个错误，我可能在其他地方（例如一个投票可能会得到每个投票在数据库而不是属于它的那些）

解决方案

  $ builder- > add（'answer'，null，array（'disabled'=> true））
  

为 PollOption 创建一个ChoiceType字段，默认情况下会使用所有PollOption填充它。没有限制选择字段，因为您的表单不知道通过 $ voteChoice-> getVote（） - > getPolloptions（）给出的所需限制。 / p>

看看Symfonys EntityType字段： query_builder 选项可能会为您提供一种方法来解决您的问题，方法是将自定义查询添加到答案字段中，该选项将选择更正PollOptions的子集通过 VoteChoice - >投票 - > Polloptions 关系。

This isn't so much an issue but rather something I noticed and would like to better understand.

I have a Poll class which has a collection of votes and pollOptions. My PollOption class has the poll it belongs to and a title. The Vote class also has the poll it belongs to, as well as its own collection of voteChoices and user. The VoteChoice class has the vote it belongs to, the answer (PollOption) that the vote is for, and a priority.

I have a form that contains a collection of forms (a Vote with many VoteChoice)

The VoteChoiceType is as follows

class VoteChoiceType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('answer', null, array('disabled' => true))
            ->add('priority', null);
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'PollBundle\Entity\VoteChoice',
        ));
    }
}

Now in my VoteController I create and populate a Vote with many voteChoices, setting the answer according to the available choices for the current poll (derived from the URL)

$vote = new Vote();
$vote->setPoll($poll);
foreach ($vote->getPoll()->getPollOptions() as $op) {
    $vc = New VoteChoice();
    $vote->addVoteChoice($vc->setAnswer($op));
}

So my twig is as follows

<ul class="voteChoices" data-prototype="{{form_widget(form.voteChoices.vars.prototype)|e('html_attr')  }}">
    {% for voteChoice in form.voteChoices %}
            <li>{{ voteChoice.vars.value.answer }} {{ form_row(voteChoice.priority) }}</li>
    {% endfor %}
</ul>
</div>
<p><button type="submit" class="btn btn-success">Go!</button></p>
{{ form_end(form) }}

However, if I enable answer in my VotechoiceType and in my twig include {{ form_row(voteChoice.answer) }} I notice that all my poll options from the table as in the selectable list, even if they are apart of another poll.

Why is this? How would I get it to just display options available form the poll the vote belongs to instead? My suspicion is I've not handled the relationship between the VoteChoice and PollOption correctly (many to one). If I've made a mistake here, I've likely done it elsewhere (eg a Poll might be getting every Vote in the db rather than the ones that belong to it)

解决方案

$builder->add('answer', null, array('disabled' => true))

creates a ChoiceType-Field for PollOption and by default it populates it with all PollOption. There is nothing limiting the Choice-Field because your form doesn't know about the desired limitation given through $voteChoice->getVote()->getPolloptions().

Take a look at Symfonys EntityType Field: The query_builder option might give you a way to solve your issue, by adding a custom query to the answer-field, which selects to correct subset of PollOptions through the VoteChoice -> Vote -> Polloptions relation.

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