Symfony2 - customizing FormType classes

Question

I have few cases where I need to ugly customizing of my FormType classes.

First one is that I need to check if the state of user is active in this case disable possibility to edit username. But just adding disabled atribute is not protecting input to be not submitted. So I decided not to show username input field. I achieved it by passing boolean through options.

Controller:

$userForm = $this->createForm(UserType::class, $user, array(
    'is_active' => ($user->getState() == 'active')
));

And then in UserType class:

if ($options['is_active']) {
    $builder
        ->add('username', EmailType::class);
}

$builder
    ->add('firstName', TextType::class),
...

Second case is that I need to remove NotBlank() constraint and add 'required' => false attribute from FileType field when profile photo is uploaded. I achieved it in similar way by passing boolean through options.

Controller:

$userForm = $this->createForm(UserType::class, $user, array(
    'is_uploaded' => !empty($photo)
));

UserType class:

// achieved same way as previous problem

My questions would be:

What recommendations would be dealing with these kind of cases?
Is what I did correct and acceptable?
Is there a documentation or examples dealing with any of these cases?

Jakub Matczak · Accepted Answer · 2016-06-16 09:08:03Z

2

You can move all this form configuration's logic into the form class.

Since you pass $user entity into the form with:

$userForm = $this->createForm(UserType::class, $user, array( // <- $user is passed
    'is_uploaded' => !empty($photo)
));

You can access it in builForm method with:

    $user = $builder->getData();

Then you can verify all the condifions inside the form and there's no need for making mess in controller.

answered Jun 16, 2016 at 9:08

Jakub Matczak

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4 Comments

Cerad Over a year ago

Are you sure about $builder->getData(). As far as I can tell the only way to get the forms data during the build process is to use a form event which involves making a listener and what not.

Jakub Matczak Over a year ago

Please notice that it's called on builder, not form. It's not the same getData that you have on your mind. This is initial data that you pass as 2nd param to createForm method or via data item in options array (3rd param).

Ignas Damunskis Over a year ago

That looks sweet. So your answer is that I can customize form logic inside? And this version you suggested is recommended? Please clarify answer and I will assign as correct one :)

Jakub Matczak Over a year ago

Yes, it makes your form reusable and cosistent with the entity. Please also note that this logic is not a business rule, but the way you build the form, so it perfectly fits to be encapsulated inside the form class.

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