Heroku iOS Tutorial using Postgres
===

I am following the tutorial on [Heroku][1] on how to use heroku on iOS. The example uses a postgres database to store images and geolocation. I downloaded the postgres app on my Lion OSX and it says the postgres server running correctly. Now I am stuck on this step:

> Update the config/database.yml file to reference the correct database user and password for >the development and test environments. Then create the local development database and run the >migrations.

    $ bundle exec rake db:create db:migrate
    ==  CreatePhotos: migrating ===========
    -- create_table(:photos)
    ...

But I receive the following error:
>could not connect to server: Permission denied
>	Is the server running locally and accepting
>	connections on Unix domain socket "/var/pgsql_socket/.s.PGSQL.5432"?
> ....


What did I do wrong? I tried to manually create the postgres database using the createdb command but I go the same connectivity error.

  [1]: https://devcenter.heroku.com/articles/ios-photo-sharing-geo-location-service