Setting up local development for Postgres Ruby-on-Rails App

Question

So I'm trying to start working on an existing RubyRails app, I've got RVM, Rails and PostgreSQL set up. I've tested rails server on a test app I made, I can connect to localhost:3000 just fine. When I copy over the existing app I'm trying to work on, cd to it and run rails server, localhost:3000 gives me

PG::ConnectionBad
fe_sendauth: no password supplied

I've looked for a few hours across Google and SO and can't find a proper solution. What I tried after a lot of reading was changing my pg_hba.conf file for postgres to have the following settings:

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     trust
# IPv4 local connections:
host    all             all             127.0.0.1/32            trust
# IPv6 local connections:
host    all             all             ::1/128                 trust
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local   replication     postgres                                md5
#host    replication     postgres        127.0.0.1/32            md5
#host    replication     postgres        ::1/128                 md5

I saved these changes and restarted the terminal (to reload these changes), and I am getting the same error on localhost:3000, the PG:ConnectionBad error. Could anyone lend a hand? This is so frustrating.

In case it helps, I'm using Ruby 2.1.1 and Rails 4.1.0 and PostgreSQL 9.3 Thank you!

Answer 1

Restarting the terminal is not enough. You can restart Postgres with

service postgresql restart

Answer 2

Looks like there is no password specified for the database:

fe_sendauth: no password supplied

You can see how you specify username and password for your database here:

http://guides.rubyonrails.org/configuring.html#configuring-a-database