Model count query does not work without implicit `id` field

[FrancisMurillo]

Hello,

I noticed when I try to get a .rummage, a count query executes such as SELECT count(t0.id) FROM table AS t0. My issue is that I don't have an implicit id field in my models, rather a prefixed table id name such as table.table_id instead of table.id.

I noticed in the function get_total_count, the query, count(b.id), confirms this. It could have been any key which could have been inferred by Schema.__schema__(:fields) |> List.first(). (https://hexdocs.pm/ecto/Ecto.Schema.html#module-reflection)

Although this may not be fixed, the documentation should include that implicit field or have it configurable. For the meantime, I added the implicit blank id field as a workaround.

[thebugcatcher]

Good catch, @FrancisMurillo. Thanks for letting me know! I will get the fix in asap 🔨 🔧

[thebugcatcher]

Addressed and fixed in #56