Rails Database Migration
- rails generate model Post title:string body:text
- rails generate migration add_xx_to_xx
- rake db:migrate
Rake Commands
- rake g migration create_tablename
- rake db:migrate
- rake db:rollback
- rake db:reset
- rake db:seed
- rake db:test:prepare
Rename Table Column
class RenameMyColumnByHand < ActiveRecord::Migration
def self.up
rename_column :my_table, :old_name, :new_name
end
def self.down
rename_column :my_table, :new_name, :old_name
end
end
rails generate migration rename_my_column_by_hand
Heroku
- heroku run rake db:migrate
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