Question

I am using PostgreSQL 9.1.3 (PostgreSQL 9.1.3 on x86_64-pc-linux-gnu, compiled by gcc-4.6.real (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1, 64-bit) and rails either 3.2.2 or 3.2.1 on ubuntu 11.10.

Now, I can connect with below command with PostgreSQL

1. su postgres

   enter password and I can see postgres=#

2. I am placing below details in my config/database.yml and executing “rails db” it is working fine.

   development:

   adapter: postgresql
   encoding: utf8
   reconnect: false
   database: sample_app_db
   pool: 5
   username: postgres
   password: passwordhere
   host: localhost
   

I am using rvm to access my rails environment. but when I start server using “rails s” command and hit url with “http://localhost:3000”, say – connection not establish.

Answer 1

try this way,

sudo -u postgres createuser -D -P your-current-ubuntu-username

and

sudo -u postgres createdb -O your-current-ubuntu-username your-database

open up this file /etc/postgresql/9.1/main/pg_hba.conf

change this line only:

local   all             all                                     peer

to this:

local   all             all                                     md5

Don’t forget to restart the postgres server:

sudo service postgresql restart

Now check, with this command

psql -d your-database -U your-current-ubuntu-username -W

it should work

This solutions works for postgresql-9.1, here is the way to install

sudo apt-get install postgresql-9.1