Symfony Form customize array for entity type

Question

In my Symfony2.6.6 project I have a category entity. I don't know how to say that properly but use the doctrine tree extension to create a tree with the category entity like:

Category 1
- Child Category 1
- Child Category 2
Category 2
- Child Category 3 ...

Now when creating the form type for creating a new Category I want to customize the array of the parent field.

The code I use

$builder->add('parent', 'entity', array('class' => 'AcmeBlogBundle:Category', 'property' => 'title'));

generates just an array with all the title as expected. But I want the array values to append a '-' for every level of the tree. Category 1 for example would be '- Category 1' and Child Category 1 would be '-- Child Category 1'. How can I do that?

Sorry if this has been asked before, I don't know how to search for that.

Artamiel · Accepted Answer · 2015-04-14 17:27:48Z

1

Okay, let's say you have property getLevel() which would return your current item's level. Then in your Category entity file, create a simple method, for example getIndentedTitle thar would return your pre-defined category based on its level.

public function getIndentedTitle() {
    return sprintf(
        '%s %s',
         str_repeat('-', $this->getLevel()),
         $this->getTitle()
    );
}

The following code will add as many "-" symbols as your current category level and will append its title next to it.

Then in your form builder, you have to specify to use that method:

$builder->add('parent', 'entity', array('class' => 'AcmeBlogBundle:Category', 'property' => 'indentedTitle'));

More info on str_repeat.

Hope you got the idea.

answered Apr 14, 2015 at 17:27

Artamiel

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