Hood What should be the values ​​of the "driver" and "source" fields?

Question

PostgreSQL

Hello. Began to deal with Golang, Revel and Hood. I immediately came across the incompleteness of the Hood documentation. The question is, what should be the field values ​​in config.json?
Tried like this:

{
  "development": {
    "driver": "postgres",
    "source": "my_development"
  }
}

I get an error:

hood db:migrate
2014/06/23 12:53:14 applying migrations...
panic: missing "=" after "my_development" in connection info string"