permission problem

[Roelof Wobben <r.wobben@xxxxxxx>]

Hello,

I try to use postgresql with Ruby on Rails.

First I see this error ; role "roelof" does not exist.

I solved it by doing :  sudo -u postgres createuser roelof

but now when I make the database by doing rake db:create I see this error ;

PG::InsufficientPrivilege: ERROR: permission denied to create database

How to solve this one?

Roelof