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`has_many :through` association with unpersisted parent instance test
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| unless File.exist?('Gemfile') | |
| File.write('Gemfile', <<-GEMFILE) | |
| source 'https://rubygems.org' | |
| gem 'rails', github: 'rails/rails' | |
| gem 'arel', github: 'rails/arel' | |
| gem 'rack', github: 'rack/rack' | |
| gem 'i18n', github: 'svenfuchs/i18n' | |
| gem 'sqlite3' | |
| GEMFILE | |
| system 'bundle' | |
| end | |
| require 'bundler' | |
| Bundler.setup(:default) | |
| require 'active_record' | |
| require 'minitest/autorun' | |
| require 'logger' | |
| # Ensure backward compatibility with Minitest 4 | |
| Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test) | |
| # 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 do |t| | |
| t.integer :author_id | |
| end | |
| create_table :authors do |t| | |
| end | |
| create_table :books do |t| | |
| t.integer :author_id | |
| end | |
| create_table :subscriptions do |t| | |
| t.integer :book_id | |
| end | |
| end | |
| class Post < ActiveRecord::Base | |
| belongs_to :author | |
| end | |
| class Author < ActiveRecord::Base | |
| has_one :post | |
| has_many :books | |
| has_many :subscriptions, through: :books | |
| end | |
| class Book < ActiveRecord::Base | |
| belongs_to :author | |
| has_many :subscriptions | |
| end | |
| class Subscription < ActiveRecord::Base | |
| belongs_to :book | |
| end | |
| class HasManyThroughAssociationWithUnpersistedParentInstance < Minitest::Test | |
| # this is passing | |
| def test_single_has_many_through_association_with_unpersisted_parent_instance | |
| post_with_single_has_many_through = Class.new(Post) do | |
| def self.name; 'PostWithSingleHasManyThrough'; end | |
| has_many :subscriptions, through: :author | |
| end | |
| post = post_with_single_has_many_through.new | |
| post.author = Author.create! | |
| book = Book.create! | |
| post.author.books << book | |
| subscription = Subscription.create! | |
| book.subscriptions << subscription | |
| assert_equal [subscription], post.subscriptions.to_a | |
| end | |
| # this is failing | |
| def test_nested_has_many_through_association_with_unpersisted_parent_instance | |
| post_with_nested_has_many_through = Class.new(Post) do | |
| def self.name; 'PostWithNestedHasManyThrough'; end | |
| has_many :books, through: :author | |
| has_many :subscriptions, through: :books | |
| end | |
| post = post_with_nested_has_many_through.new | |
| post.author = Author.create! | |
| book = Book.create! | |
| post.author.books << book | |
| subscription = Subscription.create! | |
| book.subscriptions << subscription | |
| assert_equal [subscription], post.subscriptions.to_a | |
| end | |
| end |
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