NHibernate QueryOver - Date Comparison expression

Question

Using a NHibernate QueryOver expression, how can I compare against a local variable?

For example:

[DB Table]

1 - 01/01/2011
2 - 02/20/2011
3 - 03/09/2011

I want a query to look like:

SELECT * FROM Table WHERE '03/01/2011' >= DateColumn

Where '03/01/2011' is a variable I'm passing in.

I tried:

DateTime myDate = new DateTime(2011, 3, 1);
QueryOver.Of<Table>(() => tAlias).Where(() => myDate >= tAlias.DateColumn)

However, this throws the following exception:

Could not find property myDate

Any ideas how to do this using a QueryOver expression?

Answer 1

I've never tried using Where with an parameterless expression, what if you tried something like this (what I'd use if I were doing a QueryOver[Table], not sure if there is a difference with .Of[Table])?

.Where(r => r.DateColumn <= myDate)

All the examples I've seen use the constant on the right side of the expression too, not sure if there's anything to that ( edit: looking at Phill's comment above, it appears that NHibernate does expect the column on the left and the value on the right).