Question

I’m writing a rake task that does some DB work outside of Rails/ActiveRecord.

Is there a way to get the DB connection info (host, username, password, DB name) for the current environment as defined in database.yml?

I’d like to get it so I can use it to connect like this…

con = Mysql.real_connect('host', 'user', 'pw', 'current_db') 

Answer 1

From within rails you can create a configuration object and obtain the necessary information from it:

config   = Rails.configuration.database_configuration host     = config[Rails.env]['host'] database = config[Rails.env]['database'] username = config[Rails.env]['username'] password = config[Rails.env]['password'] 

See the documentation for Rails::Configuration for details.

This just uses YAML::load to load the configuration from the database configuration file (database.yml) which you can use yourself to get the information from outside the rails environment:

require 'YAML' info = YAML::load(IO.read('database.yml')) print info['production']['host'] print info['production']['database'] ...