Fetching records by date with only day part comparison using nhibernate

Question

I would like to fetch all records from particular day, no matter what time is associated with those records. So far I have method like this:

public IQueryabl         


        

Answer 1

As said in the comments, your LINQ query works fine with NH 3.3.

In earlier releases, you can use HQL:

return session.CreateQuery("from MyClass where date(MyDate) = :day")
              .SetParameter("day", day.Date)
              .List(); //executes

You can also use the date function from Criteria, via SqlFunction. This is more convoluted, but allows building more dynamic queries:

return session.CreateCriteria()
              .Add(Restrictions.Eq(
                       Projections.SqlFunction("date",
                                               NHibernateUtil.Date,
                                               Projections.Property("MyDate")),
                       day.Date))
                .List(); //executes