Doctrine2 One-To-Many / Many-To-One relations

Question

So, 1:M / M:1 relations don\'t work the way M:M relations work (obviously), but I thought that with proper configuration, you can get the same output as a M:M relation.

Answer 1

I figured it out. Hopefully this post can help others who got as frustrated as I did!

Path.php

PathOffer.php

Offer.php

And for my frontend logic:

PathController.php

_getObject('Path', $id); // this function either generates a new entity or grabs one from database depending on $id

        $form = $this->get('form.factory')->create(new Form\PathType(), $path);
        $formHandler = $this->get('form.handler')->create(new Form\PathHandler(), $form);

        // process form
        if ($formHandler->process()) {
            $this->get('session')->setFlash('notice', 'Successfully ' . ($this->_isEdit($path) ? 'edited' : 'added') . ' path!');
            return $this->redirect($this->generateUrl('admin_path'));
        }

        return array(
            'path' => $path,
            'form' => $form->createView(),
            'postUrl' => !$this->_isEdit($path) ? $this->generateUrl('admin_path') : $this->generateUrl('admin_path_edit', array('id' => $path->getId())),
            'paths' => $this->_paginate('Path'),
            'edit' => $this->_isEdit($path) ? true : false
        );
    }

    [...]

PathType.php (the path form)

add('name')
            ->add('title')
            ->add('offers', 'collection', array(
                'type' => new PathOfferType(),
                'allow_add' => true,
                'allow_delete' => true
            ))
            ->add('active');
    }

    public function getDefaultOptions(array $options)
    {
        return array(
            'data_class' => 'JStout\MainBundle\Entity\Path'
        );
    }
}

PathOfferType.php (PathType's offers collection type)

add('offer', 'entity', array(
                'class' => 'JStout\MainBundle\Entity\Offer',
                'query_builder' => function($repository) { return $repository->createQueryBuilder('o')->orderBy('o.name', 'ASC'); },
                'property' => 'name'
            )) 
            ->add('pos', 'integer');
    }

    public function getDefaultOptions(array $options)
    {
        return array(
            'data_class' => 'JStout\MainBundle\Entity\PathOffer'
        );
    }
}

PathHandler.php (how I process the form)

form = $form;
        $this->request = $request;
        $this->entityManager = $entityManager;
    }

    public function process()
    {
        if ('POST' == $this->request->getMethod()) {
            // bind form data
            $this->form->bindRequest($this->request);

            // If form is valid
            if ($this->form->isValid() && ($path = $this->form->getData()) instanceOf Path) {
                // save offer to the database
                $this->entityManager->persist($path);

                foreach ($path->getOffers() as $offer) {
                    $offer->setPath($path);
                    $this->entityManager->persist($offer);
                }

                $this->entityManager->flush();

                return true;
            }
        }

        return false;
    }
}