Question

I have a self referencing table as covered in the doctrine documentation (which is already in heavy use throughout the application and therefore changing to nested tree isn’t a current option).

http://docs.doctrine-project.org/projects/doctrine-orm/en/2.0.x/reference/association-mapping.html#one-to-many-self-referencing

The table structure looks like this:

+----+----------+--------+
| id | parentID |  Name  |
+----+----------+--------+
|  1 |     null | Name 1 |
|  2 |        1 | Name 2 |
|  3 |        1 | Name 3 |
|  4 |        2 | Name 4 | 
|  5 |        1 | Name 5 |
--------------------------

Up until now in our forms we’ve been using the entire entities content our form, ie

        $builder->add('hierarchyid', 'entity', array(
            'class' => 'AcmeTestBundle:Hierarchies')                

Which works fine, but now I want to be able to amend this to set points in the table, ie something like:

        ->add('hierarchyid', 'entity', array(
            'class' => 'AcmeTestBundle:HierarchiesTest',
            'query_builder' => function(HierarchiesTestRepository $repo)
    {return $repo->findBy??????}

But I’ve hit a mental block how to complete this, any ideas?

One option I’ve considered is I already have code that builds an array collection of these entities, which is used elsewhere, but I’m unfamiliar with how I should go about implement a doctrine arraycollection in a form type.

private function createNodeArray($node) 
{
    $this->hierarchyArrayCollection->add($node);
    foreach ($node->getChildren() as $hierarchy)
    {
       $this->createNodeArray($hierarchy);
    }        
}

Answer 1

For anyone interested the solution I went with in the end was to generate an array and use choice field type rather than entity,such as this:

->add('hierarchyid', 'choice', array(
               'choices' => $hierarchy)