以Symfony形式为实体设置字段

Question

In my project, I have two entities. Post and Comment.

Comment entity has following fields

• name
• message
• post

I'm rendering comment form just after post. Presently in comment form I'm getting a drop down menu from which I can select a post. I don't that. I want to set post field to a default value which is same as the post rendered above that. And it should not be changeable.
How can I achieve this behavior?

UPDATE

I have following code in my controller $comment = new Comment();

$comment -> setPost($entity);
$commentForm = $this -> createCommentForm($comment);
return array(
  'entity'      => $entity,
  'delete_form' => $deleteForm->createView(),
  'comment_form' => $commentForm->createView()
);

In this code, I'm setting post value, which is coming as default value in form, but it is changeable.

I'm creating form using following code:

public function buildForm(FormBuilderInterface $builder, array $options)
  {
    $builder
    ->add('name')
    ->add('reference')
    ->add('post','entity', array(
       'class' => 'OpenSourceFeedBundle:Post',
       'required' => TRUE
     ))
    ->add('date', 'date', array(
      'html5' => TRUE,
      'widget' => 'single_text',
      'read_only' => TRUE
    ))
    ->add('message')
    ;
  }

Answer 1

You should set up comment $post value in controller. Can you show me your post/show action of your Post controller?

Basically you have show action of the post, in your controller you have post object available, so when post trigger you should do something like this

$comment = new Comment();
$comment->setPost($post);

and then do what ever you need to do, like flush comment to the database.

In twig you should not display that part with dropdown.

If you will be able to paste twig and controller I will show you solution.

Answer 2

Try this

disabled

type: boolean default: false

If you don't want a user to modify the value of a field, you can set the disabled option to true. Any submitted value will be ignored.

public function buildForm(FormBuilderInterface $builder, array $options)
  {
    $builder
    ->add('name')
    ->add('reference')
    ->add('post','entity', array(
       'class' => 'OpenSourceFeedBundle:Post',
       'required' => TRUE,
       'disabled' => true,
     ))
    ->add('date', 'date', array(
      'html5' => TRUE,
      'widget' => 'single_text',
      'read_only' => TRUE
    ))
    ->add('message')
    ;
  }