Tengo tres controladores llamadosBlogController, PostController, CommentController eseCommentController es un recurso secundario dePostController yPostController sub recurso deBlogController.

/**
 * @Rest\RouteResource("blog", pluralize=false)
 */
class BlogController extends FOSRestController
{
    public function getAction($blogUri)
    {
    ...
    }
}

/**
 * @Rest\RouteResource("post", pluralize=false)
 */
class PostController extends FOSRestController
{
    public function getAction($postId)
    {
    ...
    }
}

/**
 * @Rest\RouteResource("comment", pluralize=false)
 */
class CommentController extends FOSRestController
{
    public function getAction($commentId)
    {
    ...
    }
}

routing.yml

mgh_blog:
    resource: MGH\BlogBundle\Controller\BlogController
    type:     rest

mgh_blog_post:
    resource: MGH\BlogBundle\Controller\PostController
    type:     rest
    parent:   mgh_blog

mgh_blog_post_comment:
    resource: MGH\PostBundle\Controller\CommentController
    type:     rest
    parent:   mgh_blog_post

Yo definogetAction métodos, pero obtengo el siguiente error:

[InvalidArgumentException]                                           
  Every parent controller must have `get{SINGULAR}Action($id)` method  
  where {SINGULAR} is a singular form of associated object 

Editar:

También trato de cambiar el nombre del método agetCommentAction($commentId), getPostAction($postId) ygetBlogActionPero no funciona.

Cuando uso@RouteResource anotaciones, el nombre del método debe sergetAction($id)De lo contrario, no funciona.

Cuando cambio padre demgh_blog_post_comment enrutador amgh_blog, ¡esta funcionando!