alindeman / rails4_upgrade

Helps you upgrade to Rails 4

rails4_upgrade

Helps you more easily upgrade to Rails 4. A work in progress, I'm simply shipping something of a minimum viable product to attract others to contribute.

Inspired by rails_upgrade which helped upgrade applications from Rails 2 to Rails 3.

Written in part to complement the book Upgrading to Rails 4.

Installation

Upgrade to Ruby 1.9.3 if your application does not already use it. Rails 4 requires Ruby 1.9.3, and rails4_upgrade uses 1.9-only syntax and semantics.

Add to Gemfile:

gem 'rails4_upgrade', github: 'alindeman/rails4_upgrade'

Usage

Run rake rails4:check:

$ rake rails4:check

** GEM COMPATIBILITY CHECK **
+--------------------+----------------------+
| Dependency Path    | Rails Requirement    |
+--------------------+----------------------+
| draper 0.18.0      | actionpack ~> 3.2    |
| draper 0.18.0      | activesupport ~> 3.2 |
| simple_form 2.0.4  | actionpack ~> 3.0    |
| simple_form 2.0.4  | activemodel ~> 3.0   |
+--------------------+----------------------+

Contributing

I'm open to accepting pull requests that improve the functionality of the gem.

If there's an upgrade procedure that can be automated or semi-automated, let's discuss it. Open an issue.

Ideas:

• Recommending versions of gems that may be compatible with Rails 4
• Removing deprecated configuration options
• Adding newly required or recommended configuration options

rails4_upgrade's Issues

cannot load such file rubygems/util

I am on a Mac:
High Sierra 10.13
zsh
.rbenv
ruby 1.9.3-p448
rails 3.2.12

I get the following both with bundle exec and without

rake aborted!
cannot load such file -- rubygems/util
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in block in require'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in load_dependency' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/unicode-display_width-1.3.2/lib/unicode/display_width/index.rb:1:in <top (required)>' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/unicode-display_width-1.3.2/lib/unicode/display_width.rb:2:in require_relative'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/unicode-display_width-1.3.2/lib/unicode/display_width.rb:2:in <top (required)>' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in block in require' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in load_dependency'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/terminal-table-1.8.0/lib/terminal-table/cell.rb:1:in <top (required)>'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in block in require'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in load_dependency' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/terminal-table-1.8.0/lib/terminal-table.rb:25:in block in <top (required)>' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/terminal-table-1.8.0/lib/terminal-table.rb:24:in each'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/terminal-table-1.8.0/lib/terminal-table.rb:24:in <top (required)>' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in block in require' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in load_dependency'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require' /Users/tmb/msm/food-pantry-manager/vendor/bundle/bundler/gems/rails4_upgrade-2e39e8e55507/lib/rails4_upgrade/formatters/incompatible_gems_formatter.rb:1:in <top (required)>'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in block in require'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in load_dependency' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/bundler/gems/rails4_upgrade-2e39e8e55507/lib/rails4_upgrade/formatters.rb:1:in <top (required)>' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in block in require' /Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in load_dependency'
/Users/tmb/msm/food-pantry-manager/vendor/bundle/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require' /Users/tmb/msm/food-pantry-manager/vendor/bundle/bundler/gems/rails4_upgrade-2e39e8e55507/lib/rails4_upgrade.rb:4:in <top (required)>'
/Users/tmb/msm/food-pantry-manager/config/application.rb:14:in <top (required)>' /Users/tmb/msm/food-pantry-manager/Rakefile:5:in require'
/Users/tmb/msm/food-pantry-manager/Rakefile:5:in `<top (required)>'
(See full trace by running task with --trace)

stack level too deep on windows

Hi, I use Ruby 2.0 and Rails 4.0.0.beta1 on Windows 7, and I try to upgrade one of my 3.2.13 app to version 4. I found your tool but I get stack level too deep error message. Hope this helps for you.

$ rake rails4:check --trace
DL is deprecated, please use Fiddle
** Invoke rails4:check (first_time)
** Execute rails4:check
** GEM COMPATIBILITY CHECK **
** Invoke rails4:check_gems (first_time)
** Execute rails4:check_gems
rake aborted!
stack level too deep
c:/dev/Ruby200/lib/ruby/gems/2.0.0/gems/rake-10.0.4/lib/rake/task.rb:188
Tasks: TOP => rails4:check_gems

Have a nice day!

Scan files for deprecated code

Similar to the original rails_upgrade gem, have the rails4_upgrade gem scan files looking for potential known deprecations.

rake rails4:check raise NoMethodError: undefined method name for Array

Hi, I just tried this gem for the first time and I got a NoMethodError: undefined method name for #<Array:0x005590f01ba248> when running rake rails4:check.

I noticed that the spec of the gemfile.rb is a Bundler::LazySpecification. Is that right?

Should I have to do something different?

Thank you very much for your time on help me with this =)

More information:

ruby --version
ruby 2.2.7p470 (2017-03-28 revision 58194) [x86_64-linux]

rails --version
Rails 3.2.22.4

rake task unknown

be rake rails4:check
Resque::Helpers will be gone with no replacement in Resque 2.0.0.
Resque::Helpers will be gone with no replacement in Resque 2.0.0.
DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /Users/andriytyurnikov/Code/curriculet/server/Rakefile:7)
rake aborted!
Don't know how to build task 'rails4:check'