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Asked: 2026-05-31T08:27:05+00:00

I created a rails app with the -O option (i.e. without ActiveRecord). But now

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I created a rails app with the -O option (i.e. without ActiveRecord). But now I want to add active record to it. How can I accomplish that?

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  1. Editorial Team

    Inside of config/application.rb you should see where the ActiveRecord railtie is commented out (see below).

    # Pick the frameworks you want:
# require "active_record/railtie"
require "action_controller/railtie"
require "action_mailer/railtie"
require "active_resource/railtie"
require "sprockets/railtie"
require "rails/test_unit/railtie"

    Uncomment it.

    Also make sure to add a database.yml file and the a database adapter gem (e.g. sqlite3) to your Gemfile.

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