Undoing things in Rails
This is my memo on Undoing things in Rails.
Undo generate
$ rails generate controller FooBars baz quux
$ rails destroy controller FooBars
$ rails generate model Foo bar:string baz:integer
$ rails destroy model Foo
$ rails generate scaffold Micropost content:text user:references
$ rails destroy scaffold Micropost
Undo migrate
$ [bundle exec] rake db:migrate
$ [bundle exec] rake db:rollback
# To go all the way back to the beginning, we can use
$ [bundle exec] rake db:migrate VERSION=0
Reset database in development
rake db:drop && rake db:create && rake db:migrate && rake db:seed
Reset database in production (Heroku)
$ heroku pg:reset DATABASE