This seems like a great idea! I have a few thoughts that comes to mind, perhaps others can chip in:
- How can this be used in tandem with strong_parameters; should ensuring the structure of params be a responsibility of the controller or the mutation (I'm leaning towards the former)? [1]
- How can validation duplication between models and mutations be avoided? In the example 'string :email, matches: EMAIL_REGEX' was used, but presumably one will still validate the email in the model. I'm guessing there are solutions to this, perhaps the existing model validation can somehow be used?