bug_report_sample.rb

unless File.exist?('Gemfile')
  File.write('Gemfile', <<-GEMFILE)
   source 'https://rubygems.org'

   ruby '2.1.5'

   gem 'rails' , '4.2.0'
   gem 'arel'
   gem 'sqlite3'
   gem 'active_model_serializers', '0.9.2'
   gem 'pry'
  GEMFILE

  system 'bundle'
end

require 'bundler'
Bundler.setup(:default)

require 'active_record'
require 'active_model_serializers'
require 'minitest/autorun'
require 'logger'

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :posts, force: true  do |t|
    t.string :title
    t.text :body
  end

  create_table :comments, force: true  do |t|
    t.integer :post_id
    t.string :name
    t.text :body
  end
end

class Post < ActiveRecord::Base
  validates :title, :body, presence: true
  has_many :comments
end

class Comment < ActiveRecord::Base
  validates :name, :body, :post_id, presence: true
  belongs_to :post
end

ActiveModel::Serializer.setup do |config|
  config.embed = :ids
  config.embed_in_root = true
end

class PostSerializer < ActiveModel::Serializer
  attributes :id, :title, :body
  has_many :comments#, embeds: :ids, embed_in_root: true
end

class CommentSerializer < ActiveModel::Serializer
  attributes :id, :name, :body
end

class BugTest < Minitest::Test
  def test_filter_method
    post = Post.create!(title: 'Test filter', body: 'Test if the filter method is working fine')
    comment_1 = Comment.create!(name: 'Prasad', body: 'checking...', post: post)
    comment_2 = Comment.create!(name: 'Prasad', body: 'checked. works fine.', post: post)
    assert_equal CommentSerializer.new(comment_1).to_json, {comment: {id: comment_1.id, name: comment_1.name, body: comment_1.body}}.to_json
    assert_equal PostSerializer.new(post).to_json, {post: {id: post.id, title: post.title, body: post.body, comment_ids: [comment_1.id, comment_2.id]}, comments: [{id: comment_1.id, name: comment_1.name, body: comment_1.body}, {id: comment_2.id, name: comment_2.name, body: comment_2.body}]}.to_json
  end
end