Adjusting the database connection

In essence, the Configuration principle of the 12 Factor-Application Pattern states that an application's configuration and an application's code should be completely independent of each other. Our hipstr application currently violates this principle in a key area: the database connection. This, however, is easily resolved.

Creating the profiles.clj file

For our development server, we will create profiles.clj and have the lein-env plugin generate the .lein-env file. Currently, our hipstr.models.connection/db-spec expects 5 settings: :classname, :subprotocol, :subname, :user, and :password.

Theoretically, we could transfer the entire db-spec map into the profiles.clj file, such as shown below:

{:dev {:env {:db-spec {:classname   "org.postgresql.Driver"
                       :subprotocol "postgresql"
                       :subname     "//localhost/postgres"
                       :user        "hipstr"
     ...