RAILS_ENV=production rake assets:precompile - Failed to precompile

[studiorooster]

I have been fighting with this for hours and I cannot get the app to pre-compile. It works great on my local environment, but I am trying to push it up to Heroku, but everytime I run 'RAILS_ENV=production rake assets:precompile' I get the below error. Any help would be great. Thank you.

' charles@rooster:~/apps/cfi-app$ RAILS_ENV=production rake assets:precompile rake aborted! TypeError: no implicit conversion of nil into String /home/charles/apps/cfi-app/config/initializers/devise.rb:13:in +' /home/charles/apps/cfi-app/config/initializers/devise.rb:13:inblock in <top (required)>' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/devise-3.2.4/lib/devise.rb:288:in setup' /home/charles/apps/cfi-app/config/initializers/devise.rb:3:in<top (required)>' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in load' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:inblock in load' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:232:in load_dependency' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:inload' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/engine.rb:648:in block in load_config_initializer' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/activesupport-4.1.4/lib/active_support/notifications.rb:161:ininstrument' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/engine.rb:647:in load_config_initializer' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/engine.rb:612:inblock (2 levels) in class:Engine' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/engine.rb:611:in each' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/engine.rb:611:inblock in class:Engine' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/initializable.rb:30:in instance_exec' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/initializable.rb:30:inrun' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/initializable.rb:55:in block in run_initializers' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/initializable.rb:44:ineach' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/initializable.rb:44:in tsort_each_child' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/initializable.rb:54:inrun_initializers' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/application.rb:300:in initialize!' /home/charles/apps/cfi-app/config/environment.rb:5:in<top (required)>' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:in require' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:inblock in require' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:232:in load_dependency' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:inrequire' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/application.rb:276:in require_environment!' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/railties-4.1.4/lib/rails/application.rb:379:inblock in run_tasks_blocks' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/gems/sprockets-rails-2.1.3/lib/sprockets/rails/task.rb:55:in block (2 levels) in define' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/bin/ruby_executable_hooks:15:ineval' /home/charles/.rvm/gems/ruby-2.1.0@cfi-app/bin/ruby_executable_hooks:15:in `

' Tasks: TOP => environment (See full trace by running task with --trace)'

[DanielKehoe]

Line 13 in config/initializers/devise.rb is:

  config.mailer_sender = 'no-reply@' + Rails.application.secrets.domain_name

Do you have Rails.application.secrets.domain_name set in your *config/secrets.yml` file? If you do and it still doesn't work, try hardcoding a domain name in line 13.

[studiorooster]

That worked, I forgot I was usign the figaro gem and didn't add DOMAIN_NAME to my application.yml file.

But now am presented with another issue. I was able to compile and even deploy to Heroku, but i am getting a H10 App Crashed error code in the logs, so my app is viewable...UGH!! Have you seen this before? Thank you for your time.

[DanielKehoe]

That's new to me. I suggest to ask on Stack Overflow.

[anijhawan]

We're you able to find a fix? I'm having the same issue

[studiorooster]

@anijhawan Yes everything is working great now. When you deploy to Heroku, you need to run rake manually for your database --- $ heroku run rake db:migrate

If you don't, your app will be looking for a database that is not there, hence the crash. I am a noob at all this, but I hope this helps you out.

[goldnuggets24]

Thanks @DanielKehoe !! Helped me out quite a bit this afternoon.