Sorry for the double post, but using the schema module actually works!

Your problem is using the Account atom, which isn’t probably aliased to its fully qualified name.

You’ll see that if you alias it, or use the fully qualified module name, such as YourApp.Data.Account, it will work.

alias YourApp.Data.Account

# Without the alias above, Ecto does not know what Account is. 
# You might have multiple Account modules in different namespaces.
test(Account)

# This will always work, alias or not
test(YourApp.Data.Account)

Ah, gotcha.

The use Ecto.Schema macro creates a __schema__ function that exposes some introspection details about your schema, and you can use that to find the actual table name as string (https://hexdocs.pm/ecto/Ecto.Schema.html#module-reflection)

def test(schema_name) when is_atom(schema_name) do
  # Get the table name as string
  table_name = schema_name.__schema__(:source)
  Test.Repo.all(from a in table_name, where: a.name == "ACME", select: a.id)
end

Hope this helps!

Awesome, thanks a lot, that fixed it, it was the aliasing

Great help, really appreciate it!