Postgres cannot connect to server on Unix domain socket 5432

Question

Using Postgres 9.2.2, I keep getting this error when I try to start up rails server or run psql

could not connect to server: No such file or dir         


        

Answer 1

I saw this issue arise again once more with someone who actually had Postgres.app installed. Though, it's unclear why his threw this error because I've never seen it before with Postgres.app.

The solution was changing the database.yml file from:

development: &default
  adapter: postgresql
  database: myapp_development
  encoding: utf8
  min_messages: warning
  pool: 5
  timeout: 5000

test:
  <<: *default
  database: myapp_test

To:

development: &default
  adapter: postgresql
  database: myapp_development
  encoding: utf8
  min_messages: warning
  pool: 5
  timeout: 5000
  host: localhost

test:
  <<: *default
  database: myapp_test

Only difference is the "host" line

Answer 2

Screw it. I just installed Postgres.app by Heroku. No more messy issues.