Heroku and Rails: transferring db to staging and db:migrate

Question

I've been working on a Heroku app for several months. We've recently set up a staging server and occasionally sync the staging db with the production db . The three main commands in use are:

$ heroku pgbackups:capture --app myapp

$ heroku pg:reset DATABASE --app myapp-staging --confirm myapp-staging"

$ heroku pgbackups:restore DATABASE `heroku pgbackups:url --app myapp` --app myapp-staging

The problem is that after running the third command, I need to run heroku run rake db:migrate --app myapp-staging . We have a few dozen migrations now, including some that refer to Ruby classes that we've deleted or renamed.

This causes the migrations to fail to fully run. What's the solution here? Should I delete the old migrations that fail and commit these changes to the git repo?

Answer 1

You can also checkout the transfer command now as part of pgbackups .. see this post

How do I transfer production database to staging on Heroku using pgbackups? Getting error

Answer 2

Re-running this script fixed the error, so it seems like the schema should just copy over. For anyone seeing a failing migration like I did, the pgbackups:restore command probably failed for you, so re-run that.