Heroku Rails 4 could not connect to server: connection refused

Using postgres.
Haven't been able to push.

Tried this without any luck:

config.assets.initialize_on_precompile = false

> -----> Preparing app for Rails asset pipeline

> Running: rake assets:precompile
> 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?

If you're using Rolify pre version 3.5 then it might be that:

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Try executing locally

bundle exec rake assets:precompile RAILS_ENV=production

It might be because of **devise** gem as in my case. You might be missing secret key in devise initializer. try adding

config.secret_key = "PROVIDE-KEY"

The heroku dev center talks about troubleshooting this. Basically your rails4 app should not rely on having config vars present during runtime.

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The accepted answer did not fully resolve this. I tried to find a solution for 2-3 hours without success, then this worked:

In your app directory.

heroku labs:enable user-env-compile

it is still failing?

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

Then it worked for me, just had to remove and do again.

**The following config is no longer needed in Rails 4. Compiling assets must work without it.**

config.assets.initialize_on_precompile = false

`config.assets.initialize_on_precompile = false`

Include that in application.rb, ABOVE module APPNAME

I had originally included it inside

> class Application < Rails::Application



Edit: actually, the above didn't fix it.

I had to do this

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[1]:

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