Many to Many with Join Table in EasyAdminBundle - symfony

Question

I'm trying to get a smooth admin interface similar as if when two entities are associated by a many-to-many relationship. I need the join table to define additional information like rank. I don't want to display the jointable entity on the backend, it should be writeable in the edit-menu of at least one entity. My example:
class Question{
/**
* #Assert\NotBlank()
* #ORM\OneToMany(targetEntity="AppBundle\Entity\Options2Questions", mappedBy="question", cascade={"persist"})
*/
private $optionQuestion;
public function __construct() {
$this->optionQuestion = new \Doctrine\Common\Collections\ArrayCollection();
}
public function addOptionQuestion(\AppBundle\Entity\Options2Questions $optionQuestion){
$this->optionQuestion[] = $optionQuestion;
return $this;
}
public function removeOptionQuestion(\AppBundle\Entity\Options2Questions $optionQuestion){
$this->optionQuestion->removeElement($optionQuestion);
}
public function getOptionQuestion(){
return $this->optionQuestion;
}
}
class Options{
/**
* #Assert\NotBlank()
* #ORM\OneToMany(targetEntity="AppBundle\Entity\Options2Questions", mappedBy="options")
*/
private $optionQuestion;
public function __construct(){
$this->optionQuestion = new \Doctrine\Common\Collections\ArrayCollection();
}
public function addOptionQuestion(\AppBundle\Entity\Options2Questions $optionQuestion){
$this->optionQuestion[] = $optionQuestion;
return $this;
}
public function removeOptionQuestion(\AppBundle\Entity\Options2Questions $optionQuestion)
{
$this->optionQuestion->removeElement($optionQuestion);
}
public function getOptionQuestion(){
return $this->optionQuestion;
}
}
class Options2Questions
{
/**
* #ORM\Id()
* #ORM\ManyToOne(targetEntity="AppBundle\Entity\Options", inversedBy="optionsQuestions")
* #ORM\JoinColumn(name="options_id", referencedColumnName="id", nullable=false)
*/
private $options;
/**
* #ORM\Id()
* #ORM\ManyToOne(targetEntity="AppBundle\Entity\Question", inversedBy="optionsQuestions")
* #ORM\JoinColumn(name="question_id", referencedColumnName="id", nullable=false)
*/
private $question;
/**
* #var int
*
* #ORM\Column(name="rank", type="integer", nullable=true)
*/
private $rank;
/**
* Set rank
*
* #param integer $rank
*
* #return Options2Questions
*/
public function setRank($rank)
{
$this->rank = $rank;
return $this;
}
/**
* Get rank
*
* #return int
*/
public function getRank()
{
return $this->rank;
}
/**
* Set options
*
* #param \AppBundle\Entity\Options $options
*
* #return Options2Questions
*/
public function setOptions(\AppBundle\Entity\Options $options)
{
$this->options = $options;
return $this;
}
/**
* Get options
*
* #return \AppBundle\Entity\Options
*/
public function getOptions()
{
return $this->options;
}
/**
* Set question
*
* #param \AppBundle\Entity\Question $question
*
* #return Options2Questions
*/
public function setQuestion(\AppBundle\Entity\Question $question)
{
$this->question = $question;
return $this;
}
/**
* Get question
*
* #return \AppBundle\Entity\Question
*/
public function getQuestion()
{
return $this->question;
}
}
I could not find any documentation on this. Where should I look specifically?

Answer 1

First of all you have to create the admin class - service for the all of these three entities. Therefore you will have the next 3 classes:
a) QuestionAdmin
b) OptionAdmin
c) Options2QuestionsAdmin
If you want to remove from you admin services list the Options2QuestionsAdmin - you can add show_in_dashboard: false line to the services.yml:
app.admin.options2questions:
class: AppBundle\Options2questionsAdmin
arguments: [~, AppBundle\EntityOptions2questions, SonataAdminBundle:CRUD]
tags:
- { name: sonata.admin, manager_type: orm, group: 'your_group', label: 'your_label', show_in_dashboard: false }
In your QuestionAdmin class in formmapper method you can add this:
class QuestionAdmin extends AbstractAdmin
{
// ...
protected function configureFormFields(FormMapper $formMapper)
{
$formMapper
->add('optionQuestion', 'sonata_type_collection', [
'required' => true,
'label' => 'option_question',
'by_reference' => false,
'btn_add' => 'add_button',
'type_options' => [
'delete' => true,
],
], [
'edit' => 'inline',
'inline' => 'standard',
'sortable' => 'id',
'allow_delete' => true,
])
;
}