Rails include related Model in JSON Response

gistfile1.txt

Tested on: Rails 3.1

In this example, you want to return as json a group of Items and the name of the Company which makes them.

Models are as follows:

  class Company  < ActiveRecord::Base
    has_many :items

  class Item  < ActiveRecord::Base
    belongs_to :company

In your controller, do something like this:

  def index
    @items = Item.find :all, :include => :company  #reduce # of queries

    respond_to do |format|
      format.json { render json: @items.as_json(:include=>{:company=>{:only=>:name}}) }
    end
  end


Ref: http://stackoverflow.com/questions/8302715/rails-eager-loading-as-json-includes

Thanks. It works