Question

To prepare database for my Ruby on Rails 3 application I need to run the following steps in the Terminal:

rake db:create
rake db:migrate
rake db:seed

Is it possible to do all those steps in one? Maybe it is possible running a ‘rake’ command that will “fire” another ‘rake’ command… but how?!

Answer 1

You can define your own rake tasks which call other tasks as prerequisites:

# lib/tasks/my_tasks.rake
namespace :db do
  desc "create, migrate and seed"
  task :do_all => [:create,:migrate,:seed] do
  end
end

Normally the body of the task would contain Ruby code to do something, but in this case we are just invoking the three prerequisite tasks in turn (db:create,db:migrate,db:seed).