Tag: マイグレーション
rails generate migration create_books
rails generate migration create_books
class CreateHoges < ActiveRecord::Migration def change create_table :hoges do |t| t.string :name t.integer :age t.timestamps end end end
rails generate migration add_image_to_books
class AddImageToBooks < ActiveRecord::Migration def change add_column :books, :image, :string end end
class AddDescriptionToBooks < ActiveRecord::Migration def change add_column :books :description, :text, :limit => 4294967295 end end
rake db:migrate
rake db:migrate RAILS_ENV=production
rake db:migrate:recet