Symfony 3 - 表單模型數據丟失屬性值，而不是字段

Question

我有一個控制器操作方法，它應該處理一個兩分裂的形式。每個表格只處理我的實體Workflow的一些屬性。提交第一個表單後，我可以創建並呈現沒有問題的第二個表單。現在的問題：

提交第二表單後，所有的值在第一種形式中設置的信息都不見了，這意味着當調用submit（或handleRequest不會在這裏做任何區別）實體對象僅持有的數據屬性設置爲第一種形式，甚至無法正確解析某些值。

這裏是控制器（帶有一些註釋）：

public function createWorkflowAction(Request $request, Project $project, Workflow $workflow = null) { 

    if(!$workflow) { 
     $workflow = new Workflow($project); 
    } 

    $firstFormPart = $this->createForm(WorkflowStatesType::class, $workflow); 

    // $firstFormPart->handleRequest($request); 
    $firstFormPart->submit($request->get($firstFormPart->getName()), false); 

    $secondFormPart = $this->createForm(WorkflowTransitionsType::class, $workflow); 
    // secondFormPart is created correct with all values after submitting $firstFormPart and calling submit 

    if($firstFormPart->isSubmitted() && $firstFormPart->isValid()) { 
     return $this->render('@MyBundle/Workflow/workflow_edit_create_second_part.html.twig', array(
      'form' => $secondFormPart->createView(), 
     )); 
     // This will render correctly with all values submitted in the $firstFormPart 
    } 

    $secondFormPart->submit($request->get($secondFormPart->getName()), false); 
    // $secondFormPart->handleRequest($request); 
    // HERE IS THE PROBLEM -> After submitting the $secondFormPart all property values set in the $firstFormPart are gone 

    if($secondFormPart->isSubmitted() && $secondFormPart->isValid()) { 
     dump($workflow); 
     die(); 
    } 

    return $this->render('@MyBundle/Workflow/workflow_edit_create_first_part.html.twig', array(
     'form' => $firstFormPart->createView(), 
    )); 
} 

---

WorkflowStatesType：

class WorkflowStatesType extends AbstractType { 

     /** 
     * @var \Doctrine\ORM\Mapping\ClassMetadata 
     */ 
     private $classMetadata; 

     /** 
     * WorkflowType constructor. 
     * @param EntityManager $em 
     */ 

     public function __construct(EntityManager $em) { 
      $this->classMetadata = $em->getClassMetadata(Workflow::class); 
     } 

     public function buildForm(FormBuilderInterface $builder, array $options) { 
      $builder 
       ->setMethod('PATCH') 
       ->add('name', TextType::class, array(
        'label' => 'nameTrans', 
        'attr' => array('maxLength' => $this->classMetadata->getFieldMapping('name')['length']), 
       )) 
       ->add('states', CollectionType::class, array(
        'entry_type'  => StateType::class, 
        'allow_add'   => true, 
        'error_bubbling' => false, 
        'by_reference'  => false, 
        'label'    => 'workflowStatesTrans', 
       )) 
       ->add('next', SubmitType::class, array(
        'label' => 'nextFormPartTrans', 
       )); 
     } 

     public function configureOptions(OptionsResolver $resolver) { 
      $resolver->setDefaults(array(
       'data_class'   => Workflow::class, 
       'translation_domain' => 'My_Bundle', 
      )); 
     } 

    } 

---

WorkflowTransitionsType：

class WorkflowTransitionsType extends AbstractType { 

     /** 
     * @var Workflow 
     */ 
     private $workflow; 

     /** 
     * @var Session 
     */ 
     private $session; 

     /** 
     * {@inheritdoc} 
     */ 
     public function buildForm(FormBuilderInterface $builder, array $options) { 

      /** @var Workflow $workflow */ 
      $this->workflow = $options['data']; 

       $builder 
        ->setMethod('PATCH') 
        ->add('initialState', ChoiceType::class, array(
         'choices'   => $this->workflow->getStates(), 
         'choice_label'  => function($state) { 
          return ($state && $state instanceof State) ? $state->getStatekey() : 'noVal'; 
         }, 
         'choice_value'  => function($state) { 
          return ($state && $state instanceof State) ? $state->getStatekey() : 'noVal'; 
         }, 

         // This combination of 'expanded' and 'multiple' implements a select box 
         'expanded'   => false, 
         'multiple'   => false, 
        )) 
        ->add('transitions', CollectionType::class, array(
         'entry_type'  => TransitionType::class, 
         'allow_add'   => true, 
         'allow_delete'  => true, 
         'error_bubbling' => false, 
         'by_reference'  => false, 
         'label'    => 'transitionsTrans', 
         'entry_options'  => array(
          'states' => $this->workflow->getStates(), 
         ), 
        )) 
        ->add('save', SubmitType::class, array(
         'label'    => 'submitTrans', 
        )); 
     } 

     public function configureOptions(OptionsResolver $resolver) { 
      $resolver->setDefaults(array(
       'data_class'   => Workflow::class, 
       'translation_domain' => 'My_Bundle', 
      )); 
      $resolver->setRequired(array(
       'session' 
      )); 
     } 
    } 

提交$secondFormPart時，如何在$firstFormPart中提交$workflow的屬性值？

Answer 1

因爲表單再次僅以secondForm數據提交，所以您將丟失firstForm數據。

你有3種方式，讓他們：

1）從firstForm數據集中到查詢

// Insert that instead of the `return $this->render` for the second form 
$url = $this->generateUrl(
    $request->attributes->get('_route'), 
    array_merge(
     $request->query->all(), 
     array('secondForm' => true, 'name' => $workflow->getName(), 'states' => $workflow->getStates()) // change the param 
    ) 
); 
return $this->redirect($url); 

前$secondFormPart = $this->createForm(WorkflowTransitionsType::class, $workflow);

折戟name和states進入$workflow實體，在本例中，您可以檢查查詢變量secondForm以瞭解第一個表單是否已提交

2）從firstForm數據集中到一些隱藏字段的下一個補丁請求

您必須修改secondForm一些hidden form type

3處理來自firstForm數據）在返回第二個表格之前設置會話中的數據

首先，您的實體將必須實現接口Serializable並聲明方法serialize d unserialize

那樣

$this->get('session')->set('workflow', $workflow); 

方法serialize將被用於存儲它。

您可以在回來的方法unserialize

$session = $this->get('session'); 
$workflow = new Workflow(); 
$workflow->unserialize($session->get('workflow')); 

因爲你存儲整個實體到會話，這種解決方案會降低很多應用程序的性能

Answer 2

可以使用屬性映射。見mapped property或allow_extra_fields

Answer 3

如何我可以抱提交$ secondFormPart當$ firstFormPart提交的$工作流的屬性值？

因此，這裏是我的（不滿意）解決方案：

1. 我通過本屆會議作爲一個選項，以我的表單類爲$secondFormPart這是WorkflowTransitionsType類將它作爲一個參數時調用createForm的控制器的操作方法中：

   $secondFormPart = $this->createForm(WorkflowTransitionsType::class, $workflow, array(
       'session' => $this->get('session') 
   )); 
   

2. 我會話保存爲012內部的私有財產

   class WorkflowTransitionsType extends AbstractType { 
   
       /** 
       * @var Workflow 
       */ 
       private $workflow; 
   
       /** 
       * @var Session 
       */ 
       private $session; 
   
       /** 
       * {@inheritdoc} 
       */ 
       public function buildForm(FormBuilderInterface $builder, array $options) { 
   
        /** @var Workflow $workflow */ 
        $this->workflow = $options['data']; 
   
        /** @var Session $session */ 
        $this->session = $options['session']; 
   
        // If the workflow is stored in the session we know that this method is called a 2. time! 
        if($this->session->has($this->getBlockPrefix() . '_workflow')) $this->workflow = $this->session->get($this->getBlockPrefix() . '_workflow'); 
   
         $builder 
          ->setMethod('PATCH') 
          ->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event) { 
           dump($event); 
           // This always gets called AFTER storing the workflow if it is present in the current session 
           $this->session->set($this->getBlockPrefix() . '_workflow', $this->workflow); 
          }) 
          ->addEventListener(FormEvents::PRE_SUBMIT, function(FormEvent $event) { 
           // Here we manipulating the passed workflow data by setting all previous values! 
           $eventForm = $event->getForm(); 
   
           /** @var Workflow $submitWorkflow */ 
           $submitWorkflow = $eventForm->getData(); 
   
           $submitWorkflow->setName($this->workflow->getName()); 
           foreach($this->workflow->getStates() as $state) $submitWorkflow->addState($state); 
   
           $eventForm->setData($submitWorkflow); 
          }) 
          ->addEventListener(FormEvents::POST_SUBMIT, function(FormEvent $event) { 
           // After submitting the workflow object is no longer required! 
           $this->session->remove($this->getBlockPrefix() . '_workflow'); 
          }) 
          ->add('initialState', ChoiceType::class, array(
           ... 
           // Didn´t change (look at my question) 
          )) 
          ->add('transitions', CollectionType::class, array(
           ... 
           // Didn´t change (look at my question) 
          )) 
          ->add('save', SubmitType::class, array(
           ... 
           // Didn´t change (look at my question) 
          )); 
       } 
   
       /** 
       * {@inheritdoc} 
       */ 
       public function configureOptions(OptionsResolver $resolver) { 
        $resolver->setDefaults(array(
         'data_class'   => Workflow::class, 
         'translation_domain' => 'MyBundle', 
        )); 
        $resolver->setRequired(array(
         // This is necessary to prevent an error about an unknown option! 
         'session' 
        )); 
       } 
   }