I’m trying to setup an Elixir / Phoenix / Ecto project on my droplet and connect to a DO managed postgresql. No matter what I do I can’t connect to my DB properly:
** (Postgrex.Error) FATAL 3D000 (invalid_catalog_name) database “postgres” does not exist (db_connection) lib/db_connection/connection.ex:84: DBConnection.Connection.connect/2 (connection) lib/connection.ex:622: Connection.enter_connect/5 (stdlib) proc_lib.erl:249: :proc_lib.init_p_do_apply/3
My connection string is right, connectivity seems fine ( I setup my droplet to be able to access the db cluster) but Elixir/Ecto complains with the above error.
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HI! Sorry to hear you ran into a snag. I just set up a brand new Elixir/Phoenix app myself and ran into the exact same issue you had.
I did a little digging and it seems that either Ecto or Postgres expects the
postgres
database to exist.I logged into the db directly with my
doadmin
user and looked around, and surely enough there’s nopostgres
database. So I created one:Then I disconnected from the console, re-ran
mix ecto.create
and was greeted with:I hope that helps move you forward!
Ecto uses the ‘maintenance_database’ property to set the name of the database to connect to when creating or dropping the database. By default it’s “postgres”. In DigitalOcean, when a cluster is created, the default database is called “defaultdb”. So all you need to do is add the following config:
Here is the documentation: https://hexdocs.pm/ecto_sql/Ecto.Adapters.Postgres.html