rake commands fail if using rails 5

[yltsrc]

$ rake spec
rake aborted!
LoadError: cannot load such file -- rails/test_unit/sub_test_task
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/gems/draper-2.1.0/lib/draper/tasks/test.rake:7:in `require'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/gems/draper-2.1.0/lib/draper/tasks/test.rake:7:in `<top (required)>'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/gems/draper-2.1.0/lib/draper/railtie.rb:67:in `load'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/gems/draper-2.1.0/lib/draper/railtie.rb:67:in `block (2 levels) in <class:Railtie>'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/gems/draper-2.1.0/lib/draper/railtie.rb:67:in `each'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/gems/draper-2.1.0/lib/draper/railtie.rb:67:in `block in <class:Railtie>'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/bundler/gems/rails-1022796ac075/railties/lib/rails/railtie.rb:237:in `instance_exec'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/bundler/gems/rails-1022796ac075/railties/lib/rails/railtie.rb:237:in `block in run_tasks_blocks'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/bundler/gems/rails-1022796ac075/railties/lib/rails/railtie.rb:245:in `each'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/bundler/gems/rails-1022796ac075/railties/lib/rails/railtie.rb:245:in `each_registered_block'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/bundler/gems/rails-1022796ac075/railties/lib/rails/railtie.rb:237:in `run_tasks_blocks'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/bundler/gems/rails-1022796ac075/railties/lib/rails/application.rb:442:in `block in run_tasks_blocks'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/bundler/gems/rails-1022796ac075/railties/lib/rails/engine/railties.rb:13:in `each'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/bundler/gems/rails-1022796ac075/railties/lib/rails/engine/railties.rb:13:in `each'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/bundler/gems/rails-1022796ac075/railties/lib/rails/application.rb:442:in `run_tasks_blocks'
/home/vagrant/.rvm/gems/ruby-2.2.2@rails_5.0/bundler/gems/rails-1022796ac075/railties/lib/rails/engine.rb:460:in `load_tasks'
/home/vagrant/test_app/rakefile:7:in `<top (required)>'
(See full trace by running task with --trace)

[yltsrc]

example Gemfile

source 'https://rubygems.org'
gem 'rails', github: 'rails/rails'
gem 'sprockets-rails', github: 'rails/sprockets-rails'
gem 'arel', github: 'rails/arel'
gem 'sqlite3'
gem 'draper'
gem 'rspec-rails'

[audionerd]

In test.rake Draper requires rails/test_unit/sub_test_task, but Rails 5 does not have that file in railties/lib/rails/test_unit anymore.

It was removed by 3297909 (see also: 8017e6a).

[asiniy]

@audionerd do you have any plans regarding send pull request of your 'rails5' branch to the master branch of this repo?

[audionerd]

@asiniy No, sorry, I haven't had time to dig further into Rails 5 support for Draper. My current branch was just a quick hack that "worked for me", but I didn't do any further testing.

[mayank-istar]

can any one tell me how to resolve this error.

[jasnow]

@mayank-istar - Try "gem 'draper', github: 'audionerd/draper', branch: 'rails5'"

[seanlinsley]

@audionerd are you planning on opening a pull request?

[dmitry]

@audionerd would be great to see it get merged.

[ivanjolic95]

I can't pull draper from github because I'm using it in an engine as a dependency. Are there any plans to add official Rails 5 support?

[jasnow]

@ivanjolic95 : Did you try gem 'draper', github: 'audionerd/draper', branch: 'rails5' ?