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I have created a Rails 3 project with mentioned option. Can I somehow "revert" this option and have active record back as in default, or must I create a new project?
EDIT
Ok, to have ActiveRecord support back I had to:
application.rb and replace it with require 'rails/all' (or just uncomment # require "active_record/railtie")# gem 'sqlite3-ruby', :require => 'sqlite3' line in Gemfile (for sqlite)rake db:create taskAfter that it seems that I can continue to work with AR as usual.
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Callbacks are methods that get called at certain moments of an object's life cycle. With callbacks it is possible to write code that will run whenever an Active Record object is created, saved, updated, deleted, validated, or loaded from the database.
The configuration file config/application. rb and environment-specific configuration files (such as config/environments/production. rb ) allow you to specify the various settings that you want to pass down to all of the components. For example, you could add this setting to config/application.rb file: config.
What is ActiveRecord? ActiveRecord is an ORM. It's a layer of Ruby code that runs between your database and your logic code. When you need to make changes to the database, you'll write Ruby code, and then run "migrations" which makes the actual changes to the database.
Active Record facilitates the creation and use of business objects whose data requires persistent storage to a database. It is an implementation of the Active Record pattern which itself is a description of an Object Relational Mapping system.
Make a new project with ActiveRecord, and then pairwise diff config/application.rb and config/environments/*.rb to determine if there are any default settings you should add back to your project.
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