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has_many through not available on unpersisted instances
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| # frozen_string_literal: true | |
| 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" | |
| git_source(:github) { |repo| "https://github.com/#{repo}.git" } | |
| gem "rails", "~> 6.1.4" | |
| gem "sqlite3" | |
| end | |
| require "active_record" | |
| 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.integer :owner_id | |
| end | |
| create_table :comments, force: true do |t| | |
| end | |
| create_table :owners, force: true do |t| | |
| end | |
| create_table :posts_comments, force: true do |t| | |
| t.integer :post_id | |
| t.integer :comments_id | |
| end | |
| end | |
| class Post < ActiveRecord::Base | |
| belongs_to :owner | |
| has_many :comments | |
| end | |
| class Comment < ActiveRecord::Base | |
| has_many :posts | |
| has_many :owners, through: :posts | |
| end | |
| class Owner < ActiveRecord::Base | |
| end | |
| class BugTest < Minitest::Test | |
| def test_association_stuff | |
| owner = Owner.new() | |
| post = Post.new(owner: owner) | |
| comment = Comment.new | |
| comment.posts = [post] | |
| # passes when not using the has_many through association | |
| assert_equal owner, comment.posts.first.owner | |
| # fails when using the has_many through association | |
| assert_equal owner, comment.owners.first | |
| end | |
| end |
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