Question

In our program, each customer gets their own database. We e-mail them a link that connects them to their database. The link contains a GUID that lets the program know which database to connect to.

How do I dynamically and programatically connect ActiveRecord to the right db?

Answer 1

You can also do this easily without hardcoding anything and run migrations automatically:

customer = CustomerModel.find(id) spec = CustomerModel.configurations[RAILS_ENV] new_spec = spec.clone new_spec['database'] = customer.database_name ActiveRecord::Base.establish_connection(new_spec) ActiveRecord::Migrator.migrate('db/migrate_data/', nil) 

I find it useful to re-establish the old connection on a particular model afterwards:

CustomerModel.establish_connection(spec)