Reformatting a query result in SQLAlchemy

Question

SQL queries allow not just to get a bunch of columns as a result but form it into something usefult at the same time. Eg:

select Person.name + " likes " + Food.name as all_i_want_as_a_result from Food, Person where Food.id == Person.favourite_food

But how can I do the same with SQLAlchemy? Eg:

query = db.session.query(Food, Person).filter(Food.id == Person.favourite_food) <-- how do I modify this line?
for row in db.session.execute(query)
    print row

The expected output would be:

Alice likes icecream
Bob likes pizza

Answer 1

You can query for arbitrary things inside .query() :

query = db.session.query(Person.name.concat(" likes ").concat(Food.name).label("all_i_want_as_a_result"))
                  .filter(Food.id == Person.favourite_food)
print query

This prints:

SELECT "Person".name || ? || "Food".name AS all_i_want_as_a_result 
FROM "Person", "Food" 
WHERE "Food".id = "Person".favourite_food