7. Advanced usage

This happens when a block is rendered:

• A block is loaded based on the configuration passed to sonata_block_render,

• Each block model also has a block service, and its execute method is called:

  • You can logic into block service’s execute method, like in a controller,

  • It renders a template,

  • It returns a Response object.

7.1. Block loading

Block models are loaded by a chain loader. You should be able to add your own loader by tagging a service with sonata.block.loader" and implementing Sonata\BlockBundle\Block\BlockLoaderInterface in the loader class.

7.2. Empty block

By default, the loader interface expects the exception Sonata\BlockBundle\Exception\BlockNotFoundException if a block is not found. Return an empty block from your loader class if the default behavior for your blocks is to always return content.