boxed_select.rs

use diesel::pg;
use diesel::query_builder::BoxedSelectStatement;
use diesel::query_source::QuerySource;
use diesel::sql_types as st;
fn heckin_abstraction_with_diesel<QS>(
    conn: &PgConn,
    select: BoxedSelectStatement<(st::Text, st::BigInt), QS, pg::Pg>,                                                          
) -> HashMap<String, i64>
where
    QS: QuerySource,
    <QS as diesel::query_source::QuerySource>::FromClause:
        diesel::query_builder::QueryFragment<diesel::pg::Pg>,
{
    select
        .get_results(conn)
        .expect("augh, diesel")
        .into_iter()
        .collect()
}


fn do_stuff() {
    use crate::schema::my_table::dsl as t;
    let query = t::my_table
        .select((t::author, t::id))
        .into_boxed();
    let lookup_table = heckin_abstraction_with_diesel(conn, query);
}