I had this problem, I needed to inject a Storage to my controller so I can create a custom action and connect to my db using a storage service. All I needed was configure the services as following: [cc_yaml] services: app.admin.document: class: AppBundle\Admin\DocumentAdmin arguments: [~, AppBundle\Entity\Document, ‘app.controller.document’] tags: – { name: sonata.admin, manager_type: orm, group: