Feature/params helpers

[tiagopog]

Implements #22 and fix #21

Details

• Add helper methods to easily get permitted params for the primary resource and its relationships: resource_params and relationship_params;
• Work with a copy of ActionController's params in JSONAPI::Utils::Request#setup_request to avoid the bug reported in Inclusion of JSONAPI::Utils in a specific controller obfuscates errors #21;
• Write specs.

Example

Use resource_params helper when you need to get the permitted params from params['data']['attributes']:

class UsersController < BaseController
  # POST /users
  def create
    user = User.new(resource_params)
    if user.save
      jsonapi_render json: user, status: :created
    else
      jsonapi_render_errors json: user
    end
  end
end

Use relationship_params helper when you need to get ids from params['relationships']:

class PostsController < BaseController
  # POST /posts
  def create
    post = Post.new(post_params)
    if post.save
      jsonapi_render json: post, status: :created
    else
      jsonapi_render_errors json: post
    end
  end

  private

  def post_params
    resource_params.merge(user_id: relationship_params[:author])
  end
end

[tiagopog]

With the inclusion of JSONAPI::Utils::Request#jsonapi_request_handling method, this will also help fixing the #21.

[tiagopog]

Implementation packaged in v0.4.5.