Question

I will be making changes to a production app soon and I would like to know how to rollback all changes to the database and code. I think with pgbackups and if needed heroku db:push and pull that will rollback the database, but what about the code? Is there a way using git that this could be done, or maybe just to copy the whole folder and copy it back in if there are errors and upload everything again?
Thanks.

Answer 1

For managing your code, use git tags.

1. Find the commit of the code currently in production and tag it.
2. Add a new tag to the HEAD commit you intend to push to production

If the code needs to be rolled back, you can target the older tag during your push to heroku.

You can run git log to see the history of commits. Find the commit made just prior to your last push to production. Find the hash for that commit (on the same line as the git message in the log) and tag it

git tag -a v0.1 THEHASH

Now tag your HEAD

git tag -a v0.2

Now push to heroku

git push -f heroku v0.2^{}:master

If things go bad, rollback to v.0.1

git push -f heroku v0.1^{}:master