References represented inside of link block using JSONAPI implementation

[myabc]

From @matheusca on November 19, 2015 22:15

Hi guys,

I've trying create association links using Roar::JSON::JSONAPI but I can't reference represented method inside of the has_one block.

For instance:

class RequesterRepresenter < Roar::Decorator
  include Roar::JSON::JSONAPI

  type :requester

  has_one :residence_address do
    type :address

    link :self do
      # I need way to get requester id here.
      "http://example.com/requester/#{requester.id}/relationships/residence_address"
    end
  end

  property :id
  # ... other properties
end

How I described, I would need some way to get requester.id inside of has_one. Anyway to do it?

Copied from original issue: trailblazer/roar#168

[myabc]

From @apotonick on November 25, 2015 2:28

Does represented work for you? That's the official API!

[myabc]

From @matheusca on November 27, 2015 17:35

I can't use represented as requester inside of has_one block, because when I used it, the represented is the instance of residence_address like example above.

[myabc]

From @apotonick on December 1, 2015 1:41

That is correct behaviour.

The represented method refers to the currently rendered object, which is a residence_address in your case.

You can do represented.requester if that's what your data model allows. Alternatively, you can pass the requester as a :user_options to the block. Representable/Roar does not support accessing parent decorators right now (because that's data modelling and not representing). Let me think about that!

[myabc]

From @apotonick on December 1, 2015 2:21

As this might be a common problem in JSON API, we could introduce a :parent_represented option, which'd work as follows.

link :self do |options|
  options[:parent_represented].id
end