Add column rails migration

April 11, 2011 | By Regaz | Filed in: Uncategorized.

Here is a quick and clear tutorial about how to change a table adding one column:

  1. In your application’s root:

    $ rails generate migration add_column
  2. Open for editing your timestamp_add_column.rb with your favorite editor:

    $ sudo nano db/migration/timestamp_add_column.rb
  3. Edit you timestamp_add_column.rb:

    class AddColumn < ActiveRecord::Migration
    def self.up
    add_column :table_name, :column_name, :type
    end

    def self.down
    remove_column :table_name, :column_name
    end
    end
  4. Execute your change by running the migration:

    $ rake db:migrate
  5. Do Not Forget to Take a Look…

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