Symfony Form Tree extension

This extension provide displaying doctrine tree entity types in synfony forms. It add a prefix to option names in select list that indicates tree level.

<select name="field-name" data-level-prefix="--">
    <option value="">root node 1</option>
    <option value="">root node 2</option>
    <option value="">--node level 1</option>
    <option value="">----node level 2</option>
    <option value="">--another node level 1</option>
</select>

Usage

Register form type as service in symfony config

services:
    yavin.symfony.form.tree:
        class: "Yavin\\Symfony\\Form\\Type\\TreeType"
        tags:
            - { name: form.type, alias: y_tree }

Then you can use this as it in your form types

namespace Acme\DemoBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;

class PageType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('name')
            ->add('categories', 'y_tree', array(
                'class' => 'Acme\\DemoBundle\\Entity\\Category',
            ))
        ;
    }

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

Extension asume that your tree entities have tree properties named: treeLevel, treeRoot, treeLeft. If your entities have different names, just pass it as options to service like that:

services:
    yavin.symfony.form.tree:
        class: "Yavin\\Symfony\\Form\\Type\\TreeType"
        arguments:
            -
                treeLevelField: "lvl"
        tags:
            - { name: form.type, alias: y_tree }

Options

This is the list of options you can pass in constructor like in above example.

• levelPrefix, default: -- - prefix string for level
• treeLevelField, default: treeLevel - tree level field name
• prefixAttributeName, default: data-level-prefix - attribute name that is added to select field that holds prefix string. Can be usefull for some javascript widgets.
• orderColumns, default: array('treeRoot', 'treeLeft') - sorting columns names

Type guesser

You can also add type guesser, so tree type entities can be auto detected.

services:
    yavin.symfony.form.tree_guesser:
        class: "Yavin\\Symfony\\Form\\Type\\TreeTypeGuesser"
        arguments: [ "@doctrine.orm.entity_manager", "@annotation_reader" ]
        tags:
            - { name: form.type_guesser }

Then You can ommit field type and class option:

namespace Acme\DemoBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;

class PageType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('name')
            ->add('categories')
        ;
    }

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