jsonapi-resources—overriding fields

Question

There's a field in my resource that I want to set to 1 if it's nil in the model. I have the following code, but the resource is still producing minimum_approvers: nil

Any ideas on what's going on?

module V1
  class EntityResource < BaseResource
    model_hint model: Entity

    attribute :logo
    attribute :minimum_approvers

    def minimum_approvers
      @model.minimum_approvers.nil? ? 1 : @model.minimum_approvers
    end

Can you `byebug` `minimum_approvers` method and check value is nil or not? Is it empty string? — Md. Farhan Memon, Jun 07 '17 at 03:05
I tried byebug in the `minimum_approvers` method—it never even ran, the resource just uses the field with the same name in the model. — Mirror318, Jun 07 '17 at 03:07
why don't you consider `before_save` callback in your model and set the value there? and according to the docs, it should inherit from `JSONAPI::Resource` as `class EntityResource < JSONAPI::Resource` — Md. Farhan Memon, Jun 07 '17 at 05:57
http://jsonapi-resources.com/v0.9/guide/resources.html#Attributes — Md. Farhan Memon, Jun 07 '17 at 06:02

score 0 · Answer 1 · answered Jun 07 '17 at 22:35

0

If the method you want to call has the same name as the model's attribute, you can't override it. The best you can do is make a method in the model that does the logic, then call the method in your resource.

answered Jun 07 '17 at 22:35

Mirror318

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this is one of the reasons why I prefer `fast_jsonapi` - doing things the Rails way results in more productivity for the developers.. – Tilo Dec 16 '18 at 19:44
btw. even defining the method in the model does not seem to work – Tilo Dec 16 '18 at 22:38

score 0 · Answer 2 · answered Aug 17 '22 at 13:35

Just to flesh out the answer by @Mirror318 and to respond to the comment by @Tilo, the following worked for me with V0.10.7 of jsonapi-resources:

module V1
  class Entity < ApplicationRecord
    def minimum_approvers_with_default
      minimum_approvers || 1
    end
  end
end

module V1
  class EntityResource < BaseResource
    attribute :minimum_approvers,
              delegate: :minimum_approvers_with_default
  end
end

jsonapi-resources—overriding fields

2 Answers2