how does "bundle exec rake db:migrate" work if i have multiple databases?

Question

I am a newbie to rails/ruby. i have two databases, sqlite for development/testing and postgres for production/deployment. when i run "bundle exec rake db:migrate", which database is updated with my current data model, the sqlite or the postgres? the command output doesn't say much about the database it interacts with. ugh. when i push up the code to heroku it doesn't work, so i'm assuming the database that is updated is sqlite. any thoughts?

Answer 1

The database that is configured under your default environment (typically development).