How to rename a Rails 3 Application

Tue Jan 19 14:01:00 -0800 2010

Renaming a Rails 3 application is something you have to think about now. No, really… :)

When you create a new Rails 3.0 app with “rails app_name” Rails will create the application for you like before, but with a major difference.

It will Classify your “app_name” and use this as the Ruby name space for your application.

So if you do:

rails new app_name

Then your Rails application will have sprinklings of AppName throughout the tree.

If you later decide that your application should be called something more specific than “AppName” you need to replace out AppName from the following files:

config/application.rb
config/environment.rb
config/environments/development.rb
config/environments/test.rb
config/environments/production.rb
config/routes.rb
config.ru
initializers/secret_token.rb
initializers/session_store.rb

Of course, if you are using TextMate, a simple Project wide search and replace for AppName with your new name, should do the trick. But it is something to be aware of.

blogLater

Mikel

Edited 21 Sept 2010: to update per reader comments below.

  1. Kieran P Says:
    Mon Jan 25 21:09:06 -0800 2010

    There was a commit recently that eliminated some of these locations you need to change. The last 3 on your list (Rakefile, and script/*) now point to Rails::Application, Rails::Console, or Rails::DBConsole, and not AppName anymore.

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  5. seadh Says:
    Tue Nov 08 19:57:53 -0800 2011

    The command is “rails new app_name” to create an app.

  6. Daze Says:
    Tue Aug 31 11:09:35 -0700 2010

    The command is “rails new app_name” to create an app.

    good post though -

  7. eric Says:
    Mon Sep 20 09:00:36 -0700 2010

    I realize this post is out of date, so here’s an update

    remove:
    script/console
    script/dbconsole
    from the list

    add:
    initializers/secret_token.rb
    initializers/session_store.rb
    to the list

  8. Mikel Lindsaar Says:
    Mon Sep 20 20:08:54 -0700 2010

    @Kieran, @Daze and @eric thanks! I have updated. the post to match.

  9. Veeti Paananen Says:
    Sat Dec 04 14:07:55 -0800 2010

    You should add the Rakefile to your list again. Thanks!

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    Thank you so much! That saved my day!

  11. G. Koren Says:
    Sat Jul 02 11:30:02 -0700 2011

    You can use the Rename plugin

    https://github.com/get/Rename

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