How do i get current file path in a YAML file using ERB?

Question

In my config/database.yml file i need to retrieve the current file path. I've tried this :

<%
  logger = Logger.new(STDOUT)
  logger.debug __FILE__
%>

That outputs (erb) instead of ./config/database.yml

I know i can get the file path using

Rails.root.join('config', 'database.yml')

But that's just not satisfying as it's not dynamic.

The goal here is to get the unix name of the file owner in order to use it as a prefix to the database name so more than one developer can work with different database without the risk of committing unwanted changes :

development:
    database: <%= Etc.getpwuid(File.stat(__FILE__).uid).name %>_project_db

@MrYoshiji you can use ruby/erb code in yaml file using `<% %>` and `<%= %>` tags — Rahul Tapali, Feb 12 '13 at 15:26
check http://stackoverflow.com/questions/592554/best-way-to-create-custom-config-options-for-my-rails-app for a better way to have custom environments — ilan berci, Feb 12 '13 at 15:34
@Crystark Is it giving any error.. Try: `'<%= Etc.getpwuid(File.stat(__FILE__).uid).name %>_project_db'` — Rahul Tapali, Feb 12 '13 at 15:35
@checkit It raises the following error: `No such file or directory - (erb)` — Crystark, Feb 12 '13 at 15:41

score 1 · Accepted Answer · answered Dec 24 '13 at 11:06

In case anyone finds this, here's how i did it in the end:

In application.rb

class Application < Rails::Application
  config.whoami = Etc.getpwuid(File.stat(__FILE__).uid).try(:name)
  config.whoami.try(:downcase!)

  [...]
end

And in database.yaml

development:
  database: <%= Rails.application.config.whoami %>_project_db

How do i get current file path in a YAML file using ERB?

1 Answers1