sonata admin child admin

sonata_admin_child_admin.md

from smlr

First, create your AAdmin, ABAdmin and BAdmin Classes like you would, if those Classes wouldn't share any relation. After this, add to your sonata.admin.A service a Child sonata.admin.AB (Admin.yml or Admin.xml).

Than you can use the configureSideMenu() method in AAdmin to create a sidemenu and generate a link to ABAdmin.

It's important to add $parentAssociationMapping to your ABAdmin Class and adding some if-statements to improve the usability, if list and form is in a A-context.

If you know the mechanism, it's quite easy. Hope my example works for you..

#   Admin.yml
#   Add a Child in the Service of A

services:
    sonata.admin.A:
        class: Path\toBundle\Admin\AAdmin
        tags:
            - { name: sonata.admin, manager_type: orm, group: YourGroup, label: "label.A" }
        arguments:
            - ~
            - Path\toBundle\Entity\A
            - 'SonataAdminBundle:CRUD'
        calls:
            - [ setTranslationDomain, [toBundle]]
            - [ addChild, [@sonata.admin.AB]]

class AAdmin extends Admin
{
    protected function configureFormFields(FormMapper $formMapper)
    {
        $formMapper
            ->with('General')
                ->add('name')
                ->add('data')
                /* No add('AB') here.. as you see in my screenshot, I added it inline before. */
            ->end()
         ;
    }

    // ...
    
    protected function configureSideMenu(MenuItemInterface $menu, $action, AdminInterface $childAdmin = null)
    {
        if (!$childAdmin && !in_array($action, array('edit'))) {
            return;
        }

        $admin = $this->isChild() ? $this->getParent() : $this;

        $id = $admin->getRequest()->get('id');

        $menu->addChild(
            $this->trans('admin.sidemenu.link_view_A'),
            array('uri' => $admin->generateUrl('edit', array('id' => $id)))
        );

        $menu->addChild(
            $this->trans('admin.sidemenu.link_view_AB'),
            array('uri' => $admin->generateUrl('sonata.admin.AB.list', array('id' => $id)))
        );   
    } 
}

class ABAdmin extends Admin
{
    protected $parentAssociationMapping = 'A'; // This does the trick..
    
    protected function configureFormFields(FormMapper $formMapper)
    {
        $formMapper
            ->add('B')
            ->add('AB_Data')
        ;
        
        if (!$this->isChild()) 
            $formMapper->add('A'); // Just add the A dropdown, if you are NOT in A-context
    }

    protected function configureDatagridFilters(DatagridMapper $datagridMapper)
    {
        $datagridMapper
            ->add('AB_Data')
            ->add('B')
        ;
    }

    protected function configureListFields(ListMapper $listMapper)
    {
        if (!$this->isChild())
            $listMapper->addIdentifier('id')->addIdentifier('A');
            
        $listMapper
            ->addIdentifier('B')
            ->addIdentifier('AB_Data');
    }
}

The relations in the AB Entity are defined as the following (I added a surrogate key Id)

class AB
{
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
    protected $id;
    
/**
* @ORM\ManyToOne(targetEntity="B", inversedBy="ABs")
* @ORM\JoinColumn(name="B_id", referencedColumnName="id", nullable=false)
*/
    protected $B;
    
/**
* @ORM\ManyToOne(targetEntity="A", inversedBy="As")
* @ORM\JoinColumn(name="A_id", referencedColumnName="id", nullable=false)
*/
    protected $A;

/**
* @ORM\Column(type="string", length=10, nullable=true)
*/
    protected $AB_Data;