Doctrine 2: group by field alias (Error: '…' does not point to a Class. )

Question

I got this Doctrine query:

        select upper(substring(e.name, 1, 1)) first_letter
        from Application\\Models\\Exercise e
        group by first_letter
         


        

Answer 1

My guess is that it is looking for first_letter to be an Entity. This is similar problem in some sql queries where you can't use a computed attribute from the select statement as criteria. Try the following:

select upper(substring(e.name, 1, 1)) first_letter
from Application\Models\Exercise e
group by upper(substring(e.name, 1, 1))
order by upper(substring(e.name, 1, 1)) asc