Getting Error while pushing into Heroku (Precompiling assets failed.)

Question

Note: I am using Rails 3.2.13 and Ruby "1.9.3", and postgres-0.15.1

I tried to push my Ruby on Rails app in to heroku by following the procedure this website http://ruby.railstutorial.org/ruby-on-rails-tutorial-book#sec-deploying , but I got error while try to push into heroku

   Connecting to database specified by DATABASE_URL
   rake aborted!
   could not connect to server: Connection refused
   Is the server running on host "127.0.0.1" and accepting
   TCP/IP connections on port 5432?

 !     Precompiling assets failed.
 !     Push rejected, failed to compile Ruby app

To git@heroku.com:pure-hamlet-9148.git
 ! [remote rejected] master -> master (pre-receive hook declined)

So, I Googled myself and run the below command

heroku labs:disable user-env-compile
heroku labs:enable user-env-compile

Still getting the same error, please some help me to resolve this issue.

Answer 1

Check this article about Heroku and Rails asset:precompile error. You should set

config.assets.initialize_on_precompile = false

Answer 2

Along with Simone's answer,

Follow this website to precompile your assets locally before deploying. https://devcenter.heroku.com/articles/rails-asset-pipeline

RAILS_ENV=production bundle exec rake assets:precompile
git add public/assets -f
git commit -m "vendor compiled assets"

Answer 3

A way to resolve this error: First of all set DATABASE_URL environment variable & then again tried to push code to Heroku again. And it worked as all rake compilation done at Heroku side so no more connection to local machine making rake compilation @ .../tmp/bin..... directory.