Well, for anyone running into this, I solved it by simply returning an empty Response in execute(). My use-case was one where I wanted to show a block to users with a specific role:
First I defined my service for using the security.context service like so:
sonata.block.service.foo:
class: Acme\DemoBundle\Block\FooBlockService
arguments: [ "sonata.block.service.foo", "@templating", "@doctrine", "@security.context" ]
tags:
- { name: sonata.block }
Then I defined the block service __construct() as:
//Acme\DemoBundle\Block\FooBlockService
public function __construct($name, EngineInterface $templating, $doctrine, $securityContext)
{
parent::__construct($name, $templating);
$this->doctrine = $doctrine;
$this->securityContext = $securityContext;
}
Finally, in the execute function the first thing I did was check for a specific role on the user like so:
//Acme\DemoBundle\Block\FooBlockService
public function execute(BlockContextInterface $blockContext, Response $response = null)
{
if( $this->securityContext->isGranted("ROLE_ACME_FOO") === false )
{
return new Response();
}
//... more code
This works, but it feels like a hack. Mainly, because the Block goes through all of its stages, and only on the output it return nothing, meaning overhead. A better solution would be to somehow prevent the entire Block from being loaded, based on some custom code.
In conclusion, this isn't the best way, but it worked for me!