If you don't use a subquery, you can use the `desc("column")` in
`sqlalchemy`. (there is an `asc()` as well). Below I use `label('name')`
to specify the result column name for computed field, then order by it.
results = dbSession.query(
model.Foo.a,
sqlalchemy.func.count(Model.Foo.b).label('count_b')
)\
.group_by(model.Foo.a)\
.order_by(sqlalchemy,desc('count_b')\
.all()
If you are using a subquery for additional processing or joins, you can use
`label()` to specify the name for the computed column, then access that
column as an attribute on the `.c` columns attribute of the subquery
object.
inner_query = dbSession.query(
model.Foo.a,
sqlalchemy.func.count(Model.Foo.b).label('count_b')
)
inner_query = inner_query.subquery('query_foo')
results =
dbSession.query(inner_query.c.count_b.label('count_results')).all()
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