Greenin

Describe your Grape Entities in Rails Active Record models

Installation

Add this line to your application's Gemfile:

gem 'greenin'

or

gem 'greenin', github: 'itbeaver/greenin'

And then execute:

$ bundle

Or install it yourself as:

$ gem install greenin

Then run

$ rails g greenin:install

This generator creates an initializer with settings at config/initializers/greenin_initializer.rb. You can change method name and class name:

Greenin.setup do |config|
  config.entity_method_name = 'entity'
  config.entity_class_name = 'Entity'
end

Usage

Example describtion in Post model:

class Post < ActiveRecord::Base

  # ...

  class Entity < Grape::Entity
    format_with(:unix) { |dt| dt.to_i }
    root 'posts'

    expose :id
    with_options(format_with: :unix) do
      expose :created_at
      expose :updated_at
    end
    expose :title
    expose :description
  end

end

This gem add methods to your ActiveRecord models that call Entity.represent(self, args), so, you can call entity like that:

Post::Entity == Post.entity
# => true

Post.all.entity
# => {"posts"=>[#<Post::Entity:0x007ff0880d7d18
#                @object=#<Post id: 1, title: "Some title", created_at: "2015-02-27 17:48:07",
#                         updated_at: "2015-02-27 17:48:07">, @options={:collection=>true}>, ...]}

Post.all.entity.to_json
# => {"posts":[{"title":"Some title"},{"title":"Some title"},{"title":"Some title"}]}

Post.all.entity(root: 'myposts').to_json
# => {"myposts":[{"title":"Some title"},{"title":"Some title"},{"title":"Some title"}]}

Post.all.entity(root: 'myposts').to_json == Post::Entity.represent(Post.all, root: 'myposts').to_json
# => true

Post.first.entity.to_json
# => {"post":[{"title":"Some title"}]}

Post.first.entity(root: false).to_json
# => {"title":"Some title"}

In grape controller using json formatter:

  get '/posts' do
    status 200
    present Post.all.entity
  end

Contributing

1. Fork it ( https://github.com/itbeaver/greenin/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