Rails 3 Installation
sudo gem install rails -v3.0.4 postgres as db installation<>br/ $ sudo apt-get install postgresql
Rails 3 App with postgres as database
$ rails new pg -d postgres bundle installation
It will install dependency gems & postgres adapter for db connection
bundle install
Here by default 'postgres' database user gets created while installation but i recommend to create new db user with name same as of system user owning project directory permissions.
User owning file permission can be found using
ls -l pg drwxr-xr-x 7 sandip sandip 4096 2011-02-23 15:38 app drwxr-xr-x 5 sandip sandip 4096 2011-02-23 18:14 config -rw-r--r-- 1 sandip sandip 152 2011-02-23 15:38 config.ru ... Default 'postgres' database user gets created while installation
## Snap of database.yml development: adapter: postgresql encoding: unicode database: pg_development username: sandip pool: 5 Create new database user
pg $ sudo su postgres pg $ createuser sandip Shall the new role be a superuser? (y/n) y pg $ exit exit
Create a first development database:
pg $ psql template1 Welcome to psql 8.4.6, the PostgreSQL interactive terminal. ... template1=# \l List of databases Name | Owner | Encoding -----------+----------+---------- postgres | postgres | UTF8 template0 | postgres | UTF8 template1 | postgres | UTF8 (3 rows) template1=# CREATE DATABASE pg_development; CREATE DATABASE template1=# \l List of databases Name | Owner | Encoding -------------------+----------+---------- postgres | postgres | UTF8 pg_development | sandip | UTF8 template0 | postgres | UTF8 template1 | postgres | UTF8 (4 rows) template1=# \q
Start rails server
pg $ rails s Getting hands on postgres terminal
1. Login onto terminal
psql -U DB_USERNAME -d DB_NAME -W DB_PASSWORD 2. List databases
\l 3. Display tables
\dt 4. Exit from terminal
\q