I have been trying out dry-validation and dry-schema on a new Rails project, and finding it super handy for testing JSON schema. But I am wondering if it is meant to be used for validating a model itself. Is the recommended use only for validating external incoming params/JSON data in a controller, or do you recommend using it for validating a model itself before saving to the database in a model’s callback? For example, if I had a service object and I am just updating one attribute for User model and saving it, I’d like to have to something like below.
class User < ApplicationRecord before_save :verify_contract ... private def verify_contract UserContract.new.call(self.attributes.to_h) end end
I may be way off, and wanted to check-in to see if I am heading a wrong direction on using dry-validation/dry-schema. Should the gems be used in conjunction with validations in models (traditional Rails way) or is it meant to entirely eradicate all the validation statements in models?