Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:host]

Question

I am trying to push my app on heroku. I am still in dev. I use devise with the confirmable module.

When I try to add a user with the heroku console I got this error:<

Answer 1

Codeglot's anwser above does the job, but we wanted something a bit more flexible, so we did this:

On Heroku, we run multiple Production environments for staging and testing, so we need a flexible solution for the production.rb environment file.

In production.rb

config.action_mailer.default_url_options = { :host => ENV['MAILER_URL'] }

Then set the MAILER_URL environment variable for your app like so

heroku config:set MAILER_URL=my-awesome-app.herokuapp.com --app my-awesome-app