Now the most common setup is to copy the production database to the staging once in a while and test migration against staging. With branching, you can test eac

Now the most common setup is to copy the production database to the staging once in a while and test migration against staging. With branching, you can test each PR against its own production database branch -- just put branch creation in your CI config. Hence, it has fewer moving parts, is a bit easier to set up, and reduces the lag between prod and staging.