unable to deploy rails app to heroku

Question

my rails app works in development mode on my mac. Whrn i try to compile into heroku i get errors on the command line

    Cleaning up the bundler cache.
           Removing bundler (1.3.2)
    -----> Writing config/database.yml to read from DATABASE_URL
    -----> Preparing app for Rails asset pipeline
           Running: rake assets:precompile
           rake aborted!
           undefined method `[]' for nil:NilClass
           /tmp/build_9afd2a8f-0be9-427c-82f9-5431cf3a30fc/config/initializers/devise.rb:234:in `block in <top (required)>'
           /tmp/build_9afd2a8f-0be9-427c-82f9-5431cf3a30fc/vendor/bundle/ruby/2.0.0/gems/devise-3.1.2/lib/devise.rb:276:in `setup'
           /
           /tmp/build_9afd2a8f-0be9-427c-82f9-5431cf3a30fc/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0.rc1/lib/rails/engine.rb:609:in `bl
     /tmp/build_9afd2a8f-0be9-427c-82f9-5431cf3a30fc/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0.rc1/lib/rails/application.rb:214:in `initialize!'
       /tmp/build_9afd2a8f-0be9-427c-82f9-5431cf3a30fc/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0.rc1/lib/rails/railtie/configurable.rb:30:in `method_missing'
       /tmp/build_9afd2a8f-0be9-427c-82f9-5431cf3a30fc/config/environment.rb:5:in `<top (required)>'
       /tmp/build_9afd2a8f-0be9-427c-82f9-5431cf3a30fc/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0.rc1/lib/active_support/dependencies.rb:228:in `require'
       /tmp/build_9afd2a8f-0be9-427c-82f9-5431cf3a30fc/vendor/bundle/ruby/2.0.0/gems/activesupport-
       Tasks: TOP => environment
       (See full trace by running task with --trace)
 !
 !     Precompiling assets failed.
 !

 !     Push rejected, failed to compile Ruby app

checked my devise.rb the only line i added was

config.omniauth :facebook, FACEBOOK_CONFIG['facebook_api_key'], FACEBOOK_CONFIG['facebook_api_secret'], scope: "email, publish_actions"

and this is my gemfile - as you can see i have the production and development information included


group :development, :test do
     gem 'sqlite3'
end

group :production do
     gem 'pg'
     gem 'rails_12factor'
end

as advised devise 230-238

# ==> OmniAuth
  # Add a new OmniAuth provider. Check the wiki for more information on setting
  # up on your models and hooks.
   config.omniauth :facebook, FACEBOOK_CONFIG['facebook_api_key'], FACEBOOK_CONFIG['facebook_api_secret'], scope: "email, publish_actions"

  # ==> Warden configuration
  # If you want to use other strategies, that are not supported by Devise, or
  # change the failure app, you can configure them inside the config.warden block.

Answer 1

You probably want to stop using this magick FACEBOOK_CONFIG variable and start using environment variables for heroku

config.omniauth :facebook, ENV['FACEBOOK_API_KEY'], ENV['FACEBOOK_API_SECRET'], scope: "email, publish_actions"

to get this ENV working on development easier please check: https://github.com/bkeepers/dotenv or https://github.com/laserlemon/figaro

Answer 2

Obviously FACEBOOK_CONFIG that you're trying to use is nil .

First you have to set the two environment variables in your Heroku account :

$ heroku config:set FACEBOOK_API_KEY=your-key-here
$ heroku config:set FACEBOOK_API_SECRET=your-secret-here

Then verify these are set correctly:

$ heroku config:get FACEBOOK_API_KEY
$ heroku config:get FACEBOOK_API_SECRET

Finally update the device.rb file as follows:

config.omniauth :facebook, ENV['FACEBOOK_API_KEY'], ENV['FACEBOOK_API_SECRET'], scope: "email, publish_actions"

Now should be good to go.

Answer 3

It looks like the issue is with Devise. the error says

undefined method `[]' for nil:NilClass 

If you look at the next line down it is coming from.

config/initializers/devise.rb:234

So the error is on line 234 in config/initializers/devise.rb.

Run the following command on your mac.

bundle exec rake assets:precompile

If you don't get the same error, then you know that it is an issue with your production environment.

Can you add what you have on line config/initializers/devise.rb:234

Answer 4

Just update your facebook.yml file with same information for production. I guess you only have development.

/config/facebook.yml

development:
  facebook_api_key: copy_from_here
  facebook_api_secret: copy_2_from_here

production:
  facebook_api_key: paste_to_here
  facebook_api_secret: paste_2_here