Can also look at repo.delete_all/2, it accepts a query for doing just that.

Ypu can do something like this:

%MyStruct{id: 10} |> MyApp.Repo.delete

That is just build a struct with the id in it then delete

I tried that, but that generates an error:
** (Ecto.StaleEntryError) attempted to delete a stale struct

Thank you! Just to show a more thorough example:

{rows_deleted, _} = from(x in DataModel, where: x.id == ^id) |>; Repo.delete_all

You might get zero as the number of rows deleted.

I think you have to do a query to pass existing rows to delete or delete_all,
because they require the Ecto metadata element of the struct to contain the ‘loaded’ flag.
The only alternative would be to completely fake the whole struct,
including all the internal fields and flags.

But I agree with you that there should be a version of delete,
which just takes a primary key value, by analogy with the ‘get’ function.