This gem has the function of adapt the Active Model Serializers to work in Sinatra from a more practical way with models. If do you use everything at the default, just require sinatra_active_model_serializers for serializers work correctly the a json response.

Ruby 1.9.2 or greater, Sinatra 1.4.5 or greater and Sinatra Contrib 1.4.2 or greater.

gem install sinatra-active-model-serializers

or with bundler

# Gemfile
source 'http://rubygems.org'

gem 'sinatra', '1.4.6'
gem 'sinatra-contrib', '1.4.6'
gem 'sinatra-active-model-serializers', '0.2.0'

It's very easy. Look at the example:

require 'rubygems'
require 'bundler'
Bundler.require :default

Dir['./app/models/**/*.rb'].each { |file| require file }

class App < Sinatra::Base
  get '/' do
    json Test.first
  end
end

This attribute is an object, all inserted configuration this object it will be passed on to Active Model Serializers, eg.

set :active_model_serializers, { root: false }

By default, path is app/serializers. If you need a different path you can set your path, eg.

set :serializers_path, './whatever_path/serializers'

or you can disable auto require

set :serializers_path, false

When you return a json, you can send a the second parameter. This the second parameter is an object. This object may contain new configurations to assign to the Active Model Serializers or to rewrite any already set by default, eg.

get '/' do
  json Resource.first, { root: false }
end

get '/' do
  json Resource.first, { scope: self }
end

If you wish to use an another serializer than the default, you can explicitly pass it through the renderer

1. For a resource:

json Resource.first, { serializer: ResourcePreviewSerializer }

2. For an array resource:

Use the default ArraySerializer, which will use each_serializer to serialize each element.

json @resources, { each_serializer: ResourcePreviewSerializer }

MIT