This is a middleware for Her which makes it possible to consume API endpoints used by ember-data's ActiveModelAdapter. You can read more about the data format in the ember-data's docs

Add this line to your application's Gemfile:

gem 'ember_data_active_model_parser'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ember_data_active_model_parser

The parser expects that all your serializers are embedding the ids of the associations like this:

class ProjectSerializer < ActiveModel::Serializer
  embed :ids, embed_in_root: true

  attributes :id, :name

  has_many :tasks
end

class TaskSerializer < ActiveModel::Serializer
  embed :ids, embed_in_root: true

  attributes :id, :name, :completed
end

also you need to specify that active_model_serializers format in the Her models:

class Project
  include Her::Model

  parse_root_in_json true, format: :active_model_serializers

  has_many :tasks
end

class Task
  include Her::Model

  parse_root_in_json true, format: :active_model_serializers

  belongs_to :project
end

In order to tell Her to use the serializer you need to replace the default JSON parser with it in an initializer (ex. config/initializers/her.rb):

Her::API.setup url: "http://localhost:3000" do |c|
  # Request
  c.use Faraday::Request::UrlEncoded

  # Response
  c.use EmberDataActiveModelParser::Middleware

  # Adapter
  c.use Faraday::Adapter::NetHttp
end

Be careful when defining your serializers not to fall into a circular dependency problems. For example including the project_id in the tasks:

class ProjectSerializer < ActiveModel::Serializer
  embed :ids, embed_in_root: true

  attributes :id, :name

  has_many :tasks
end

class TaskSerializer < ActiveModel::Serializer
  embed :ids, embed_in_root: true

  attributes :id, :name, :completed

  # This is going to cause SystemStackError in her, because of the circular dependency between
  # the models
  attributes :project_id
end

You can see some example probjects here:

• A Rails API with EmberJS as frontend for projects and tasks: ember_rails_api_example
• A Rails app which uses Her as ORM to consume data from the example project above: ember_rails_api_consumer

1. Fork it ( https://github.com/valo/ember_data_active_model_parser/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request