Postgres database missing after rails crash

Question

My rails app crashed and when I attempted to restart the server and connect I kept seeing:

$ psql
psql: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

I following the instructions in many different questions, reinstalling postgres, updating brew, etc. and nothing was working. The only file I removed was the postmaster.pid file from /usr/local/var/postgres . When I looked in the server.log file I saw I was using the wrong version of postgres and that the data directory was for another version.

I installed the older version and when I run psql it cannot find my database. The only available databases are postgres , template0 , and template1

Am I missing something or did I manage to delete all my data?

Answer 1

If, when you reinstalled Postgres, you made a major database version change, your database will be gone. Perhaps this will help you migrate your old data to your new running postgres instance.