Entity access controler not called from custom route

Question

I define a custom entity named "Politician", where I set the class PoliticianAccessControl as an access handler. This is working fine for the canonical url of the entity set in the following way:

entity.politician.canonical:
  path: '/politician/{politician}'
  defaults:
    _controller: '\Drupal\pw_basic\Controller\EntityViewController\PoliticianViewController::view'
    _title_callback: '\Drupal\pw_basic\Controller\EntityViewController\PoliticianViewController::title'
  requirements:
    _entity_access: 'politician.view'

See the entity access requirement? Here the method PoliticianAccessControl->checkAccess() ist called, everything works just fine.

But when I try the same with another custom route the PoliticianAccessControl class gets not called and I always get an access denied message:

entity.politician.about_me:
  path: '/politician/{politician}/about-me'
  defaults:
    _controller: '\Drupal\pw_basic\Controller\PoliticianFrontend\AboutMe::build'
    _title_callback: '\Drupal\pw_basic\Controller\PoliticianFrontend\AboutMe::title'
  requirements:
    _entity_access: 'politician.view'

What do I forget?

Answer 1

You need to give the router a nudge towards what $politician is supposed to be for the automatic up-casting to kick in. There are two ways to do that:

1. Type-hint the variable in the controller method:

   function build(Politician $politician) {
   

   See EntityResolverManager::setParametersFromReflection for details

2. Explicitly set the parameter type in the route config (which is pretty much what the first method does for you)

   options:
     parameters:
       politician:
         type: 'entity:politician'
   

Answer 2

I guess you need to do a route parameter upcasting:

entity.politician.about_me:
  path: '/politician/{politician}/about-me'
  defaults:
    _controller: '\Drupal\pw_basic\Controller\PoliticianFrontend\AboutMe::build'
    _title_callback: '\Drupal\pw_basic\Controller\PoliticianFrontend\AboutMe::title'
  requirements:
    _entity_access: 'politician.view'
  options:
    parameters:
      politician:
        type: entity:politician