Symfony2 entity choice list set selected object

Question

There are two entities, Category and Device. A device can be related to exactly one category. A category can be related to many devices.

I use following custom form type to create and edit a device:

class DeviceFormType extends AbstractType {

    public function buildForm(FormBuilder $builder, array $options) {

        $builder->add('name');
        $builder->add('category', 'entity', array(
            'class' => 'MySupportBundle:Category',
            'property' => 'name'
        ));
    }

    public function getName() {
        return 'device';
    }

    public function getDefaultOptions(array $options) {
        return array(
            'data_class' => 'My\SupportBundle\Entity\Device',
        );
    }

}

So basically each device has a name and is assign to one category. This works fine. Now when I try to edit the device and change the category, in the choice list the current category is not selected:

 public function editDeviceAction($id, Request $request) {

        $em = $this->getDoctrine()->getEntityManager();
        $device = $em->getRepository('MySupportBundle:Device')->find($id);

        $form = $this->createForm(new DeviceFormType(), $device);

        $valid = false;

        if ('POST' == $request->getMethod()) {
            $form->bindRequest($request);

            if ($form->isValid()) {
                $device = $form->getData();
                $device->setUpdatedAt(new \DateTime('now'));
                $em->flush();

                return $this->redirect($this->generateUrl('view_shop'));
            } else {
                $valid = true;
            }
        } else {
            $valid = true;
        }

        return $this->render('MySupportBundle:Shop:editDevice.html.twig', array(
                    'form' => $form->createView(),
                    'valid' => $valid,
                    'device' => $device
                ));
    }

Any ideas how to set the category as selected?

Device:

<entity name="My\SupportBundle\Entity\Device" table="device">   
        <id name="id" type="integer" column="id">
                <generator strategy="AUTO" />
        </id>

        <many-to-one field="category" target-entity="Category"/>

        <field name="name" column="name" type="string" length="255"/>     
</entity>

Category:

<entity name="My\SupportBundle\Entity\Category" table="category">   
    <id name="id" type="integer" column="id">
            <generator strategy="AUTO" />
    </id>

    <one-to-many field="device" target-entity="Device" mapped-by="Device"/>

    <field name="name" column="name" type="string" length="255"/>              
</entity>

Nll · Accepted Answer · 2012-09-14 11:03:36Z

1

Hi I'm not sure but are you checking the relationship One-To-Many and Many-to-One?They are uni-directional or bidirictinal?You can show us your Device and Category Entity Classes...

answered Sep 14, 2012 at 11:03

Nll

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1 Comment

Nll Over a year ago

I guess in your entity classes all is good,on the other hand you make var_dump($device) when u use find($id) and you see What it will return as a result because u have a problem in this line...

moonwave99 · Accepted Answer · 2012-09-14 12:13:24Z

1

You are using a custom repository method called find() - depending on how you overloaded it, Category may not have been fetched. You can rely on default findOneById(int $id) method.

edited Sep 14, 2012 at 12:13

answered Sep 14, 2012 at 11:56

moonwave99

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2 Comments

DarkLeafyGreen Over a year ago

Updating an entity you do not need the call persist. symfony.com/doc/2.0/book/doctrine.html#updating-an-object

moonwave99 Over a year ago

@ArtWorkAD I know, I'm just guessing your query doesn't feature an explicit join on Category entity so it results as null.

DarkLeafyGreen · Accepted Answer · 2012-09-20 18:05:35Z

1

Finally I found a solution by myself.

Obviously when creating form view like this

{{ form_widget(form.type)}}

and in form type like this

    $builder->add('type', 'entity', array(
        'class' => 'MyBundle:Category',
        'property' => 'name'
    ));

it won't work. Because "type" is wrong. It has to be "category" instead of "type". Very strange but this was the problem ;)

answered Sep 20, 2012 at 18:05

DarkLeafyGreen

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