Additional options to :has_one/:has_many

[Jesterovskiy]

Hi. I want to pass additional options for has_one relations. In https://github.com/fotinakis/jsonapi-serializers/blob/master/lib/jsonapi-serializers/attributes.rb#L58 when make debug I see parent_name hash in options, but in https://github.com/fotinakis/jsonapi-serializers/blob/master/lib/jsonapi-serializers/serializer.rb#L174 attr_data[:options] is empty. Maybe I something misunderstood =(

My sample code:
Controller

serialize_models(categories, include: %w(image posts))

Serialisers

class API::V1::CategorySerializer < API::V1::BaseSerializer
  has_one :image, parent_name: 'category' 
  has_many :posts
end

class API::V1::PostSerializer < API::V1::BaseSerializer
  has_one :image, parent_name: 'post'
end

[fotinakis]

I think you might be misunderstanding, parent_name is not part of the JSON-API spec so it's not an option we support on has_one or has_many. What is the result you are going for?

[Jesterovskiy]

@fotinakis I know this) I actually try to understand process and make PR for add this functionality. But fail =(
In my ImageSerializer I need additional options, for understand, who is call, to show proper Image. I'm thinking about: if we have options hash already in attributes.rb, maybe we can show it in Serializer. What do you think?

[fotinakis]

Can you use context instead? Like: JSONAPI::Serializer.serialize(post, context: {parent: 'from_post'}) — you can then check context[:parent] inside the serializer to make changes.

This is an undocumented feature because it is not quite complete yet. We need to get https://github.com/fotinakis/jsonapi-serializers/pull/53/files in first.

Let me know if that will solve your problem.

[Jesterovskiy]

@fotinakis not fully understand, how I can provide context for has_one relation =( Can you make example?

[Jesterovskiy]

@fotinakis Sorry for disturbing, can you help?

[fotinakis]

Hey @Jesterovskiy, sorry I don't totally understand what the goal is here. I think context handling may solve your problem, so I will add documentation for that and you can let me know if it helps — you may be able to understand it from the tests in this commit: f83d34f -- but docs will explain it better.

[Jesterovskiy]

@fotinakis try to explain my relationships:
Category has one Image and has many Posts.
Post has one Image.
For each Image I need to know what relation(parent) he have to take right resolution.
For Category Index I need serialize categories with include: %w(image)
For Category Show I need serialize category with include: %w(image posts)

In my opinion, if I can in CategorySerializer add has_one :image, context: { parent_name: 'category' } or options: { parent_name: 'category' } and get this parameter in ImageSerializer is good solution. Maybe I something miss, but you propose add context in CategoryController and this context will be in ImageSerializer.
Can you show example, how to transform serialize_model(category, include: %w(image posts)) to add context for image in Category and image in Post?
Thank you very much for your patience =)

[Jesterovskiy]

@fotinakis Hello =)