Created
January 29, 2019 22:30
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require "bundler/inline" | |
gemfile(true) do | |
source "https://rubygems.org" | |
gem "activerecord", "6.0.0.beta1", require: "active_record" | |
gem "sqlite3" | |
end | |
ActiveRecord::Base.logger = Logger.new(STDOUT) | |
ActiveRecord::Base.establish_connection( | |
adapter: "sqlite3", | |
database: ":memory:", | |
) | |
ActiveRecord::Schema.define do | |
create_table :articles | |
create_table :tags do |t| | |
t.references :article | |
t.references :user | |
end | |
create_table :users | |
end | |
class Article < ActiveRecord::Base | |
has_many :tags | |
has_many :users, through: :tags | |
end | |
class Tag < ActiveRecord::Base | |
belongs_to :article | |
belongs_to :user | |
validates :article_id, presence: true | |
validates :user_id, presence: true | |
end | |
class User < ActiveRecord::Base | |
has_many :tags | |
has_many :articles, through: :tags | |
end | |
require "minitest/autorun" | |
class ExampleTest < Minitest::Test | |
def test_create | |
User.create!.articles.create! | |
end | |
end |
memo: rails/rails#33673
6.0.0.beta1 だと Tag の validation のタイミングで article_id が nil になっている。Article 保存前の _run_validate_callbacks で Tag の validation も実行されてエラーになる。INSERT INTO articles も結局実行されない。
#<Tag:0x00007feb87bc4650 id: nil, article_id: nil, user_id: 1>
5.2.2 では nil ではない。
#<Tag:0x00007f91854a4c28 id: nil, article_id: 1, user_id: 1>
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6.0.0.beta1
5.2.2