Hi guys,
I get an exception saying "Value cannot be null" when i execute this query (NH
3.3.3):
var total = query.Sum(x => x.Income);
The exception happens when the query returns no result.I found there's already
a Jira issue about this: https://nhibernate.jira.com/browse/NH-3113
But why won't fix? It's really not usable if this query throws exception. In
every application that need to do reporting will encounter this.And this
violate the semantic of the sum and linq to objects, right? If this should
throw exception, why query.Count() don't throws? (I understand the technical
reason of this, just saying why the semantic of these are not consistent)
If L2S or EF behaves the same, I think it's their bug. Not because it's a good
thing.Workaounds like this "var sum = myQuery.Sum(x => (int?)x.Prop) ?? 0" make
my code really ugly.
Ideas?
Mouhong
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