Interactive generators make creating new bundles, CRUD controllers, entities and forms very easy indeed. You can list all of the out of the box functions at the terminal by calling,

php app/console

The interactive generators are listed under the sub-heading of generator.

generate
  generate:bundle                       Generates a bundle
  generate:doctrine:crud                Generates a CRUD based on a Doctrine entity
  generate:doctrine:entities            Generate entity classes and method stubs from your mapping information
  generate:doctrine:entity              Generates a new Doctrine entity inside a bundle
  generate:doctrine:form                Generates a form type class based on a Doctrine entity

In the remainder of this post I am going to talk a little about the CRUD generator could be described as your answer to the missing admin controller. It makes creating, reading, updating and deleting (hence the name) your database objects very easy.

First of all you must create an object that is to be persisted,

generate
 php app/console generate:doctrine:entity

This generator will take you through a series of steps to create the entity, specifying each property and its type. To create the CRUD for this is simple,

generate
 php app/console generate:doctrine:crud

This will take you through another series of steps where you have to specify if the generator should create write actions, the configuration format (my personal preference is always for annotations) and finally the route prefix. Once you have done this you now have an entity that is essentially a php object and a controller and a series of forms that allow you to create, write, updated and delete those objects. It is verbs simple but saves huge amounts of time so give interactive generators a go.

On the Symfony 2.0 website there is a great tutorial video that illustrates how to use these new interactive generators.