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@werner
Created July 2, 2014 16:57
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Habtm and before create callback
unless File.exist?('Gemfile')
File.write('Gemfile', <<-GEMFILE)
source 'https://rubygems.org'
gem 'rails', github: 'rails/rails'
gem 'arel', github: 'rails/arel'
gem 'sqlite3'
GEMFILE
system 'bundle'
end
require 'bundler'
Bundler.setup(:default)
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 do |t|
end
create_table :comments do |t|
t.integer :post_id
t.boolean :commented
end
create_table :comments_posts, id: false do |t|
t.references :post, null: false
t.references :comment, null: false
end
end
class Post < ActiveRecord::Base
has_and_belongs_to_many :comments
before_create do
if comments.to_a.count < 2
errors.add(:base, "You shoud have at least 2 comments")
false
end
end
after_create do
comments.update_all(commented: true)
end
end
class Comment < ActiveRecord::Base
has_and_belongs_to_many :posts
end
class BugTest < Minitest::Test
def test_association_stuff
post = Post.new
first_comment = Comment.create! commented: false
second_comment = Comment.create! commented: false
post.comment_ids = [first_comment.id, second_comment.id]
post.save!
assert_equal 2, post.comments.count
assert_equal 2, Comment.count
assert_equal 2, post.comments.where(commented: true).count
end
end
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