Role does not exist and unable to create database when using PostgreSQL

Question

I am using Heroku for my application and it requires PostgreSQL but you can still use SQLite3 for development. Since Heroku strongly advised against having 2 different datab

Answer 1

PostgreSQL will try to create the database with your account (login) name if a username isn't specified in your config/database.yml. On OS X and Linux you can you see who this is with whoami. Looks like you're using Windows.

Solution A: Create a PostgreSQL user that matches the one it's looking for. For example

createuser --superuser some_user

Solution B: Change the DB user by explicitly setting a username as shown in mu's answer.