Activerecord::Bitemporal::Tablize

Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file lib/activerecord/bitemporal/tablize. To experiment with that code, run bin/console for an interactive prompt.

TODO: Delete this and the text above, and describe your gem

Installation

Add this line to your application's Gemfile:

gem 'activerecord-bitemporal-tablize'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install activerecord-bitemporal-tablize

Usage

ローカル環境でgemをインストールする
以下を.pryrcなどに追加

インストールされたパスをロードパスに含める
requireする

# cat ~/.pryrc
$: << '/Users/lighty/.rbenv/versions/3.0.1/lib/ruby/gems/3.0.0/gems/activerecord-bitemporal-tablize-0.1.3/lib/'
require 'activerecord-bitemporal-tablize'

ref: https://qiita.com/kyanny/items/d370efe14ef15d9afacb

[1] pry(main)> Employee.first.histories.print_histories
   (0.8ms)  SELECT sqlite_version(*)
  Employee Load (0.3ms)  SELECT "employees".* FROM "employees" WHERE "employees"."valid_from" <= ? AND "employees"."valid_to" > ? AND "employees"."deleted_at" IS NULL ORDER BY "employees"."bitemporal_id" ASC LIMIT ?  [["valid_from", "2021-06-20 13:21:42.229006"], ["valid_to", "2021-06-20 13:21:42.229006"], ["LIMIT", 1]]
  Employee Load (0.2ms)  SELECT "employees".* FROM "employees" WHERE "employees"."deleted_at" IS NULL AND "employees"."bitemporal_id" = ? ORDER BY "employees"."valid_from" DESC  [["bitemporal_id", 1]]
+------------+----+---------+--------+-----------+-------------------------+-------------------------+---------------+------------+------------+------------+-------------------------+-------------------------+
|            | id | unit_id | name   | joined_at | created_at              | updated_at              | bitemporal_id | valid_from | valid_to   | deleted_at | transaction_from        | transaction_to          |
+-9999/12/31-+----+---------+--------+-----------+-------------------------+-------------------------+---------------+------------+------------+------------+-------------------------+-------------------------+
|            | 1  | 2       | 山田   |           | 2021-06-20 01:44:43 UTC | 2021-06-20 01:44:43 UTC | 1             | 2021/04/01 | 9999/12/31 |            | 2021-06-20 01:44:43 UTC | 9999-12-31 00:00:00 UTC |
+-2021/04/01-+----+---------+--------+-----------+-------------------------+-------------------------+---------------+------------+------------+------------+-------------------------+-------------------------+
+-2021/04/01-+----+---------+--------+-----------+-------------------------+-------------------------+---------------+------------+------------+------------+-------------------------+-------------------------+
|            | 1  | 1       | たけし |           | 2021-06-20 01:44:43 UTC | 2021-06-20 01:44:43 UTC | 1             | 2020/01/01 | 2021/04/01 |            | 2021-06-20 01:44:43 UTC | 9999-12-31 00:00:00 UTC |
+-2020/01/01-+----+---------+--------+-----------+-------------------------+-------------------------+---------------+------------+------------+------------+-------------------------+-------------------------+
=> nil
[2] pry(main)> Employee.first.histories.print_histories_diff
  Employee Load (0.2ms)  SELECT "employees".* FROM "employees" WHERE "employees"."valid_from" <= ? AND "employees"."valid_to" > ? AND "employees"."deleted_at" IS NULL ORDER BY "employees"."bitemporal_id" ASC LIMIT ?  [["valid_from", "2021-06-20 13:21:44.302316"], ["valid_to", "2021-06-20 13:21:44.302316"], ["LIMIT", 1]]
  Employee Load (0.1ms)  SELECT "employees".* FROM "employees" WHERE "employees"."deleted_at" IS NULL AND "employees"."bitemporal_id" = ? ORDER BY "employees"."valid_from" DESC  [["bitemporal_id", 1]]
+------------+---------+--------+-------------------------+------------+------------+
|            | unit_id | name   | updated_at              | valid_from | valid_to   |
+-9999/12/31-+---------+--------+-------------------------+------------+------------+
|            | 2       | 山田   | 2021-06-20 01:44:43 UTC | 2021/04/01 | 9999/12/31 |
+-2021/04/01-+---------+--------+-------------------------+------------+------------+
+-2021/04/01-+---------+--------+-------------------------+------------+------------+
|            | 1       | たけし | 2021-06-20 01:44:43 UTC | 2020/01/01 | 2021/04/01 |
+-2020/01/01-+---------+--------+-------------------------+------------+------------+
=> nil
[3] pry(main)> Employee.first.histories.print_histories(:name)
  Employee Load (0.2ms)  SELECT "employees".* FROM "employees" WHERE "employees"."valid_from" <= ? AND "employees"."valid_to" > ? AND "employees"."deleted_at" IS NULL ORDER BY "employees"."bitemporal_id" ASC LIMIT ?  [["valid_from", "2021-06-20 13:22:54.269095"], ["valid_to", "2021-06-20 13:22:54.269095"], ["LIMIT", 1]]
  Employee Load (0.1ms)  SELECT "employees".* FROM "employees" WHERE "employees"."deleted_at" IS NULL AND "employees"."bitemporal_id" = ? ORDER BY "employees"."valid_from" DESC  [["bitemporal_id", 1]]
+------------+--------+
|            | name   |
+-9999/12/31-+--------+
|            | 山田   |
+-2021/04/01-+--------+
+-2021/04/01-+--------+
|            | たけし |
+-2020/01/01-+--------+
=> nil

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/activerecord-bitemporal-tablize.