使用Rails 3.1预编译资产

Question

I'm pushing changes to Heroku and I get ...

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?

When I consult the Heroku documentation Here , it tells me I need to "configure a nonexistent database in your local config/database.yml" I'm not sure how to create a "nonexistent database"? I'm a beginner and would appreciate any help you can give me. Thanks.

Answer 1

On Heroku, you must set this line in your config/application.rb:

config.assets.initialize_on_precompile = false

http://guides.rubyonrails.org/asset_pipeline.html#precompiling-assets

For faster asset precompiles, you can partially load your application by setting config.assets.initialize_on_precompile to false in config/application.rb, though in that case templates cannot see application objects or methods. Heroku requires this to be false.

Answer 2

It means put in the name of a database that doesn't actually exist in your local dev environment. Then try and run rake assets:precompile

You're simulating the same scenario locally (an unavailable db).

Are you using Devise in this app? It had a known issue similar to this . You may want to update that gem.

Answer 3

I ran into the same problem. It seems that for some reason the DATABASE_URL environment variable is not set at the time of asset precompilation. A workaround is to set the DATABASE_URL in the production.rb file. ENV["DATABASE_URL"] = <your db url> That should fix the problem.