[Feat] allow omitting resolver alias in tag config

[akomm]

Q	A
Bug report?	no
Feature request?	yes
BC Break report?	no
RFC?	no
Version/Branch	0.7.1

When omitting alias for an resolver would implicitly set the alias to be equal the service class name, combined with this feature request, a lot of boilerplate configuration could be saved using a bundle like DunglasActionBundle. You would not need to configure any resolver services at all, as long as you implement a single resolve function per class (__invoke).

[mcg-web]

Ok I understand the need, is true that the bundle require a lot of configuration, we must work on a flow to ease resolvers and mutations definitions.... In first step i added #133.

[akomm]

I was about checking out to make a PR, this was the fastest reaction I ever experienced!

AppBundle\GraphQL\Resolver\WorkflowsResolver:
    class: AppBundle\GraphQL\Resolver\WorkflowsResolver
    tags:
      - { name: overblog_graphql.resolver, method: '__invoke', alias: 'AppBundle\GraphQL\Resolver\WorkflowsResolver' }

Should be defaulted from:

services:
  AppBundle\GraphQL\Resolver\WorkflowsResolver:
    class: AppBundle\GraphQL\Resolver\WorkflowsResolver
    tags:
      - { name: overblog_graphql.resolver }

This could be the default behavior without BC break. And with some extras, like the DunlasActionBundle it would be possible to auto-tag & wire so you don`t even need to provide this. I think it should not be be tied to another bundle, but it saves already boilerplate without. The usage of the bundle can be proposed in docs as a best practice to even save more, if you agree.

• Resolver/Mutation services become thin. They do not handle 100 different resolves/mutations: Concern separation.
• You don't have to write the config for resolver/mutation services.
• It is all compile time

[mcg-web]

This is awesome! Implementing this could helps win a lot of time. DunglasActionBundle is a good example...

[mcg-web]

This feature has been added to master (release will comes later), here the doc. Thanks again for the idea 👍