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rails plugin install git://github.com/get/Rename.git will allow us to rename only rails 3 app

Is there any gem available to rename Rails 4 app.

If not, suggest me the better way to rename.

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11 Answers 11

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136

Since rails 4.1.x, if you want to rename your application, the only two files you need to modify are config/application.rb:

require File.expand_path('../boot', __FILE__) require 'rails/all' # Require the gems listed in Gemfile, including any gems # you've limited to :test, :development, or :production. Bundler.require(*Rails.groups) module YourApplicationName # <-- rename it here class Application < Rails::Application ... end end

and config/initializers/session_store.rb (optional):

# Be sure to restart your server when you modify this file. Rails.application.config.session_store :cookie_store, key: '_your_application_name_session' # <-- rename the key

For Rails 4.0.x you can use the rename gem and execute the following command:

rails g rename:app_to New-Name

This will update the necessary files for you:

old/ (master) › rails g rename:app_to new Search and replace module in to... gsub config.ru gsub Gemfile gsub Gemfile.lock gsub Rakefile gsub README.md gsub config/application.rb gsub config/boot.rb gsub config/environment.rb gsub config/environments/development.rb gsub config/environments/production.rb gsub config/environments/test.rb gsub config/initializers/backtrace_silencers.rb gsub config/initializers/filter_parameter_logging.rb gsub config/initializers/inflections.rb gsub config/initializers/load_class_extensions.rb gsub config/initializers/mime_types.rb gsub config/initializers/secret_token.rb gsub config/initializers/session_store.rb gsub config/initializers/update.rb gsub config/initializers/wrap_parameters.rb gsub config/routes.rb gsub config/initializers/session_store.rb Renaming references... Renaming directory...Done! New application path is '/Users/username/code/new'
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9 Comments

The Rails 4.1.x example didn't work for me using Rails 4.1.0. I found that I had to change the name of the module in config/routes.rb as well: YourApplicationName::Application.routes.draw do.
@Adam this is true if you upgrade an existing Rails application to 4.1.x. Running rake rails:update changes YourApplicationName::Application to Rails.application.
You might want to rename the databases in config/database.yml too.
If you follow @yenshirak's advice to rename the database, note that changing the name in database.yml only changes the place that it looks for the database, it does not actually rename the database itself. If you change the specified location, you'll also need to rename the database using a tool like pgadmin or psql. IMO, it's easiest to leave this unchanged.
@jasonleonhard the browser tab title is provided by your layouts title tag. Check app/views/layouts/application.html.erb if you want to change it.
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36

Add

gem 'rename' to Gemfile

then

bundle install

After that 

rails g rename:app_to name_of_app

And if you are using mongoid then you need to rename the database name in config/mongoid.yml

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3 Comments

This currently accepted answer is near identical to the person who posted it first in 2014: @complistic
While this gem works, it should be used with caution. I had an experimental application named admin. When I used rename gem to change its name it also changed all occurences of Admin in comments as well as code to the new name many of which were in fact related to Active Admin. It even changes constants of which the project name just happens to be a part of, like : ActiveAdmin
[DEPRECATION] app_to is deprecated. Please use into instead.
29

There are two ways:

1 . Manually (For Rails 4.1.x)

You need to manually find the references to the application name. And you need to change them manually. Here is some common places where it is used:

config/application.rb config/environment.rb config/environments/development.rb config/environments/production.rb config/environments/test.rb config/initializers/secret_token.rb config/initializers/session_store.rb config/routes.rb config.ru app/views/layouts/application.html.erb Rakefile

2 . Automatic (For Rails 3 and 4.0.X)

Or you can use the rename gem and execute the following command:

rails g rename:app_to New-Name
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2 Comments

Note that the rename gem README says "This plugin will only work for Rails 3 and below."
I was able to rename my rails application( rails 4.0.4 ) using this gem... Rails 4.1 and later are not supported by this gem.
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For Rails 5

Require

  • config/application.rb change the module name

Optional

  • config/initializers/session_store.rb (in Rails.application.config.session_store) change the session name
  • app/views/layouts/application.html.erb You can change the <title>...</title>, if it is not already done
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Don't forget to change the database names at config/database.ym !
16

I just used this rename gem in a basic rails 4 app:

https://github.com/morshedalam/rename

This is quite a bit different to get's version.

Easy enough to use:

Add this to Gemfile:

gem 'rename'

And run:

rails g rename:app_to NewName

Seemed to the trick,
It also updated my rubymine .idea project settings :)

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2 Comments

What is "get's version"?
The github.com/get/rename plugin stated in the question and other answer is by the github user get, this is completely different to the github.com/morshedalam/rename gem im talking about, and wanted to make that a bit more obvious. (the later works in Rails 4)
9

In Rails 4.2 just change in application config file

config/application.rb

and config/initializers/session_store.rb (optional):

Rails.application.config.session_store :cookie_store, key: '_your_application_name_session' # <-- rename the key

then restart your server.

That's it!

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1

For rails 5.2

Add gem 'rename' to the gemfile

bundle install

rails g rename:into your_new_app_name

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0

Here is a gem specifically for Rails 4 https://github.com/negativetwelve/rails-rename (I haven't used it but it seems fine)

The other gems listed here only target Rails 3

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0

In Rails 5.x, doing it manually

using ag (https://github.com/ggreer/the_silver_searcher), there are files that use the default folder name (if generated via rails new .)

three basic files, relative to root of project, need to be updated:

  • config/cable.yml > channel_prefix:
  • config/environments/production.rb > # config.active_job.queue_name_prefix
  • package.json > name

There are sure to be more locations as mentioned previously such as database etc. Hope this helps.

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0

How to Rename a Rails 6.1.3 Application

the "rename" gem doesn’t appear to be tested against Rails 6 at this time according to their documentation so I opted for the manual route.

  • config/database.yml (rename the 3 databases)
  • config/application.rb (rename the module)
  • package.json (rename the package name)
  • README.md (in case it mentions your old app name)
  • app/views/layouts/application.html.erb (rename the title)
  • config/cable.yml (name the Channel_prefix database to the new production database)
  • Run npm install so that the name attribute you previously updated in package.json is registered.
  • Run your migrations rails db:migrate
  • Start your server rails s
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0

For Rails 6.1 Here is what I did: rename module config/application.rb run bundle install and run rails db:migrate.

after that running rails c then Rails.application.class.module_parent.name

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