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has_one 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", :git => "git@github.com:/mkessler/rails.git" | |
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 | |
t.string :title | |
end | |
create_table :comments, force: true do |t| | |
t.integer :post_id | |
end | |
create_table :owners, force: true do |t| | |
t.integer :post_id | |
t.string :name | |
end | |
end | |
class Post < ActiveRecord::Base | |
belongs_to :owner | |
has_many :comments | |
end | |
class Comment < ActiveRecord::Base | |
belongs_to :post | |
has_one :owner, through: :post | |
end | |
class Owner < ActiveRecord::Base | |
end | |
class BugTest < Minitest::Test | |
def test_association_stuff | |
owner = Owner.new(name: "cool_post_owner") | |
post = Post.new(owner: owner, title: "A cool post") | |
comment = Comment.new | |
post.comments << comment | |
refute_nil comment.post.title | |
assert_equal post.title, comment.post.title | |
# passes when not using the has_one through association | |
assert_equal owner.name, post.comments.first.post.owner.name | |
# fails when using the has_one through association | |
assert_equal owner.name, post.comments.first.owner.name | |
end | |
end |
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