Change/Override params in associations

[lukaspili]

Would it be possible to allow something like this?

class FooJson
  include Alba::Resource
  one :bar, resource: BarJson, params: { some: "other_value" }
end

FooJson.new(data, params: { some: "value" }).serialize

Thanks!

[okuramasafumi]

@lukaspili Hi, it's currently not possible but if there're some usecases I'd like to support it. Could you share your usecase? For example, what kind of JSON output you want with given object?

[lukaspili]

Thanks for the quick reply! My concrete use case is that I want to expose different attributes depending on permissions. This is a simple example with one nesting, but I have some use cases where the scope params is passed down to several nested associations.

class UserJson
  include Alba::Resource

  attributes :email_address, if: proc { params[:scope] == "session" }
end

class ContractJson
  include Alba::Resource

  one :creator, resource: UserJson # apply session scope 
  one :counter_party, resource: UserJson # apply anon scope 
end

[okuramasafumi]

One way to achieve this goal would be to use inheritance, for example:

class UserJson
  include Alba::Resource

  attributes :email_address
end

class AnonUserJson < UserJson
  def attributes
    super.reject {|k, v| k == :email_address}
  end
end

AnonUserJson is a customized version of UserJson that rejects some attributes.

[lukaspili]

Yes - that's a good suggestion. However inheritance can quickly show its limits compared to params when scope is not a single value but a list or a composition of multiple scopeA, scopeB

[okuramasafumi]

True. Would you implement this feature on your own? If you will I can help. If not, then don't worry, I'll implement it.

[lukaspili]

Sorry - I won't have time to tackle it. Thanks in advance if you do it, but if not I understand!

[okuramasafumi]

Hi @lukaspili , at #227 I've implemented this feature. I added some descriptions to README so please could you check it and see if it's good for you?

[lukaspili]

Hi @okuramasafumi sorry for the late reply. It looks good :) Thank you!