How to Configure Columns That Do Not Match Naming Conventions in ActiveRecord

I looked it up and found that using the alias_attribute method is good (although I have never used it).

class Movie <ActiveRecord::Base
  alias_attribute:created_at,:created
end

• https://stackoverflow.com/questions/1162079/how-to-override-activerecords-default-attribute-column-associations

However, created_at is a special column, so the above method may not work.
There are many ways to hack on the page below.

• https://stackoverflow.com/questions/733630/renaming-the-created-at-updated-at-columns-of-activerecord-rails

But I haven't tried this again, and the information is a little old, so I don't know if it works with recent Rails.

Generally speaking, Rails are most productive when they are "on the rails," or when they are created according to Rails rules.
As your question will be "off the rails", we recommend that you adjust your implementation to Rails as much as possible without relying too much on these hacks.

By the way, the search keyword I used this time looks like this.

• activerecord override column name
• activerecord alias name created_at

For your information.

Here, we write directly in the model class, but if there are many, it might be better to inherit them appropriately.

class User<ActiveRecord::Base
  before_create —set_created
  before_save —set_updated

  private

  default_created
    self.created=DateTime.now
  end

  default_updated
    self.updated=DateTime.now
  end
end

class User<ActiveRecord::Base
  private

  def timestamp_attributes_for_update
    super+[:updated]
  end

  def timestamp_attributes_for_create
    super+[:created]
  end
end

If you want to change for all models, you may want to overwrite the ActiveRecord::Timestamp method.Specifically, the config/initializers file below.(The filename is optional.)

#config/initializers/set_activerecord_timestamps.rb
module ActiveRecord
  module Timestamp
    def timestamp_attributes_for_update
      [:updated_at,:updated_on,:updated]
    end

    def timestamp_attributes_for_create
      [:created_at,:created_on,:created]
    end
  end
end

cf.https://github.com/rails/rails/blob/4-2-stable/activerecord/lib/active_record/timestamp.rb

You can also change the ActivaRecord::Base directly.(You should be able to use before_*** or override the method.) You should also consider changing the DB column name to match Rails.