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@zachwalton
Last active July 7, 2017 00:40
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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", "4.2.7.1"
gem "arel", github: "rails/arel"
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|
end
create_table :comments, force: true do |t|
t.integer :post_id
end
end
class Post < ActiveRecord::Base
has_many :comments
end
class Comment < ActiveRecord::Base
belongs_to :post
end
class BugTest < Minitest::Test
def test_association_stuff
post = Post.create!
post.comments << Comment.create!
post.comments << Comment.create!
post.comments << Comment.create!
assert_equal 3, post.comments.count
assert_equal [1, 2, 3], post.comments.pluck(:id)
assert_equal [1, 2, 3], post.comments.map(&:id)
search_comments = [Comment.last]
search_result = Post.includes(:comments).find_by(comments: { id: search_comments })
assert_equal 3, search_result.comments.count
assert_equal [1, 2, 3], search_result.comments.pluck(:id)
# Fails, should be same array as the line above.
assert_equal [1, 2, 3], search_result.comments.map(&:id)
end
end
@zachwalton
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Finished in 0.049941s, 20.0236 runs/s, 100.1181 assertions/s.

  1) Failure:
BugTest#test_association_stuff [bug.rb:55]:
Expected: [1, 2, 3]
  Actual: [3]

1 runs, 5 assertions, 1 failures, 0 errors, 0 skips

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