select parameter constraint

[sackery]

    pub fn load_select<Selection, T>(nid: i64, selection: Selection, conn: &PgConnection) -> QueryResult<T>
        where Selection: ???,
              T: ???
    {
        node::table.find(nid)
                   .select(selection)
                   .first(conn)
    }

[sgrif]

Probably T: Queryable<Selection::SqlType>, Selection: SelectableExpression<node::table>. Follow the compiler errors and ask more specific questions if you don't understand the constraints it claims aren't holding.