brew-upgrade-postgres-fix.md

The error was most likely caused by a brew upgrade command that upgraded postgres and now no longer connects correctly.

You can follow the commands below but you will lose prior databases.

$ brew services stop postgres
$ cd /usr/local/var
$ ls

You should see postgres folder. Next we'll move it to a backup.

$ mv postgres postgres-old
$ ls

You should see the renamed postgres folder

Next, we need to uninstall and reinstall postgres. Using --force will uninstall all versions of postgres.

$ brew uninstall --force postgres
$ brew install postgres
$ brew services start postgres

Then, recreate any databases you were using

createdb _username_
migrate & seed