Cannot call into_boxed() for Table

[Razican]

Hi,
I'm trying to add dynamic ordering and filtering to a query, but I'm facing some issues. I'm trying this:

let query = table.into_boxed();
    query = query
        .select(select)
        .limit(limit)
        .offset(offset)
        .into_boxed();

    if let Some(order_by) = order_by {
        for (col, order) in order_by.iter() {
            let column: diesel_dynamic_schema::Column<_, _, Any> = table.column(col.to_owned());
            match order {
                OrderType::Asc => query = query.then_order_by(column.asc()),
                OrderType::Desc => query = query.then_order_by(column.desc()),
            }
        }
    }

But I'm getting this error:

error[E0277]: the trait bound `diesel::query_builder::SelectStatement<diesel_dynamic_schema::table::Table<T>>: diesel::query_dsl::boxed_dsl::BoxedDsl<'_, _>` is not satisfied
   --> src/db.rs:407:23
    |
407 |     let query = table.into_boxed();
    |                       ^^^^^^^^^^ the trait `diesel::query_dsl::boxed_dsl::BoxedDsl<'_, _>` is not implemented for `diesel::query_builder::SelectStatement<diesel_dynamic_schema::table::Table<T>>`
    |
    = help: the following implementations were found:
              <diesel::query_builder::SelectStatement<F, diesel::query_builder::select_clause::DefaultSelectClause, D, W, O, L, Of, G> as diesel::query_dsl::boxed_dsl::BoxedDsl<'a, DB>>
              <diesel::query_builder::SelectStatement<F, diesel::query_builder::select_clause::SelectClause<S>, D, W, O, L, Of, G> as diesel::query_dsl::boxed_dsl::BoxedDsl<'a, DB>>
    = note: required because of the requirements on the impl of `diesel::query_dsl::boxed_dsl::BoxedDsl<'_, _>` for `diesel_dynamic_schema::table::Table<T>`

It seems that into_boxed() is not implemented for this case. Is there a way to do this properly?

[Razican]

This might be related to using a Dynamic Select Clause. I tried to implement BoxedDsl myself, but it seems that some types are internal to Diesel, so I could not do it.

If I get some pointers I can implement it and create a pull request :)

[weiznich]

I've updated #10 to fix that.
A basic requirement remains that the select clause appears before the boxing.