RAILS_test_association_pluck_array_field.rb

begin
  require 'bundler/inline'
rescue LoadError => e
  $stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
  raise e
end

gemfile(true) do
  source 'https://rubygems.org'
  gem 'rails', '4.2.3'
  gem 'pg'
end

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

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: 'postgresql', host: 'localhost', username: 'claytonliggitt', password: '', database: 'rails',  encoding: 'utf8')
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :users, force: true  do |t|
  end

  create_table :departments, force: true do |t|
    t.belongs_to :user
    t.integer :account_ids, array: true, default: []
  end
end

class User < ActiveRecord::Base
  has_many :departments
end

class Department < ActiveRecord::Base
  belongs_to :user
end

class BugTest < Minitest::Test
  def test_association_pluck_array_field
    user = User.create!
    3.times do
      user.departments.create! account_ids: [1, 2, 3]
    end

    assert_equal user.departments.pluck(:account_ids), [[1, 2, 3], [1, 2, 3], [1, 2, 3]]
  end
end