How To Configure Your “$ Rails New” Defaults

If you’ve used Ruby on Rails before, you’re probably familiar with the standard way of generating a new rails project:

$ rails new myAwesomeApp

However, did you know that you can add default options for your rails app? For example, if you want rails to skip test unit (if you’re using rspec instead), skip bundle install, and set your default database to PostgreSQL you can run:

$ rails new myAwesomeApp --skip-test-unit --skip-bundle -d postgresql

If you have specific defaults that you always use, here is a simple to configure the default rails command (“$ rails new myAwesomeApp”) to always include your options:


First, to view all the possible options for the rails new command, simply type this in your terminal:

$ rails new --help

Now, simple put in the defaults in your ~/.railsrc file, which you can open with text mate via the command line:

$ mate ~/.railsrc

My defaults are as follows:

--skip-bundle #skips bundle install on generating a new rails app
--skip-test-unit #skips making the test unit folders (I use rspec)
-d postgresql #defaults my development database to PostgreSQL instead of SQLite3

Now, whenever I run “$ rails new myAwesomeApp”, the generated rails project automatically skips over bundle, skips test unit, and sets my database to PostgreSQL!

Enjoy the article? Join over 14,500+ Swift developers and enthusiasts who get my weekly updates.

  • Thanks natasha!! great post!

  • Phlip

    uh – don’t set a bad example of erasing the unit test!

  • Nathan

    Thank you Natasha! This is great. Until now I’ve been adding all these arguments every time I create a new project.

  • Pathé Séne

    Great Natasha As Usual

  • Robert Bousquet

    Useful post. I use the same defaults but we’re using minitest.