rails reproduce template

README.md

Rails replication script template

Related to Rails issue report: rails/rails#38881

original template https://github.com/rails/rails/blob/master/guides/bug_report_templates/active_record_master.rb

reproduce38881.rb

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  gem "rails", github: "rails/rails"
  gem "sqlite3"
end

require "active_record"
require 'active_support/test_case'
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
    t.string  :source
  end
end

class Post < ActiveRecord::Base
  has_many :comments
end

class Comment < ActiveRecord::Base
  SOURCE_INTERFACE='interface'
  belongs_to :post

  scope :interface, -> { where(source: Comment::SOURCE_INTERFACE) }
end

class BugTest < Minitest::Test
  include ActiveSupport::Testing::Deprecation

  def test_association_stuff
    post = Post.create!

    assert_deprecated do
      post.comments.interface.create!
    end
  end
end

reproduce38881_try-2_STI-column.rb

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  gem "rails", github: "rails/rails"
  gem "sqlite3"
end

require "active_record"
require 'active_support/test_case'
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
    t.string  :type
  end
end

class Post < ActiveRecord::Base
  has_many :comments
end

class Comment < ActiveRecord::Base
  SOURCE_INTERFACE='interface'
  belongs_to :post

  self.inheritance_column = :_type_disabled

  scope :interface, -> { where(type: BusinessLogic::SomeBusinessLogic) }
end

module BusinessLogic
  class SomeBusinessLogic
  end
end

class BugTest < Minitest::Test
  include ActiveSupport::Testing::Deprecation

  def test_association_stuff
    post = Post.create!

    assert_deprecated do
      post.comments.interface.create!
    end
  end
end

I've runned it on Rails 6.0.2.2 and 6.0.2.1