[Proposal] #force_update with valid_from valid_to

[osyo-manga]

Summary

Allow force_update to specify valid_from valid_to when updating with #force_update.
force_update { _1.update(valid_from: valid_from, valid_to: valid_to) } Then all records between valid_from ~ valid_to will be overwritten with record.
This can be used to delete history, etc.
See test code for specific behavior.

Sample code

def puts_histories(record)
  puts Company.ignore_valid_datetime.bitemporal_for(record.id).order(:valid_from).pluck(:id, :valid_from, :valid_to, :name).map { |id, valid_from, valid_to, name|
    "| #{"%02d" % id} | #{valid_from} ~ #{valid_to} | #{name} |"
  }
  puts
  puts "---" * 10
  puts
end

company = nil
ActiveRecord::Bitemporal.valid_at("2020/01/01") {
  company = Company.create(name: "A")
}

ActiveRecord::Bitemporal.valid_at("2020/02/01") {
  company.update!(name: "B")
}

ActiveRecord::Bitemporal.valid_at("2020/03/01") {
  company.update!(name: "C")
}

ActiveRecord::Bitemporal.valid_at("2020/04/01") {
  company.update!(name: "D")
}

puts_histories company


# Overwrite 2020/01/10 ~ 2020/04/10 with X
company = Company.find_at_time("2020/02/01", company.id)
company.force_update { |record|
  record.update!(valid_from: "2020/01/20", valid_to: "2020/04/10", name: "X")
}

puts_histories company


# Delete X history
company = Company.find_at_time("2020/01/01", company.id)
company.force_update { |record|
  record.update!(valid_to: "2020/04/10")
}

puts_histories company
__END__
output:

| 02 | 2020-01-01 00:00:00 UTC ~ 2020-02-01 00:00:00 UTC | A |
| 04 | 2020-02-01 00:00:00 UTC ~ 2020-03-01 00:00:00 UTC | B |
| 06 | 2020-03-01 00:00:00 UTC ~ 2020-04-01 00:00:00 UTC | C |
| 07 | 2020-04-01 00:00:00 UTC ~ 9999-12-31 00:00:00 UTC | D |

------------------------------

| 08 | 2020-01-01 00:00:00 UTC ~ 2020-01-20 00:00:00 UTC | A |
| 09 | 2020-01-20 00:00:00 UTC ~ 2020-04-10 00:00:00 UTC | X |
| 10 | 2020-04-10 00:00:00 UTC ~ 9999-12-31 00:00:00 UTC | D |

------------------------------

| 11 | 2020-01-01 00:00:00 UTC ~ 2020-04-10 00:00:00 UTC | A |
| 10 | 2020-04-10 00:00:00 UTC ~ 9999-12-31 00:00:00 UTC | D |

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