Then this needs to be changed in the documentation: "NHibernate supports .NET 2.0 Nullable types. These types are mostly treated the same as plain non-Nullable types internally. For example, a property of type Nullable<Int32> can be mapped using type="Int32" or type="System.Int32".
If you do not specify a type, NHibernate will use reflection upon the named property to take a guess at the correct NHibernate type. NHibernate will try to interpret the name of the return class of the property getter using rules 2, 3, 4 in that order. However, this is not always enough. In certain cases you will still need the type attribute. (For example, to distinguish between NHibernateUtil.DateTime and NHibernateUtil.Timestamp, or to specify a custom type.)" On Mar 27, 4:03 pm, Will Shaver <[email protected]> wrote: > Ack, of course epitka is right. Remember that nullable types are actually > implemented with the backtick operator. > Remember that this: > ?int > is actually this: > System.Nullable``1[[System.Int32]] > > or something like that... > > -Will > > On Fri, Mar 27, 2009 at 2:00 PM, epitka <[email protected]> wrote: > > > I am not sure about this, but try taking "type" attribute out of your > > mapping and let NH figure out what the type is. > > > On Mar 27, 1:43 pm, joshlrogers <[email protected]> wrote: > > > Yes this is definite. I run a query through a plain old data set and > > > they return null. I have verified my database design as well....just > > > for clarification sake: > > > > CREATE TABLE [dbo].[tblCWTRatingGroups]( > > > [Id] [int] IDENTITY(0,1) NOT NULL, > > > [Name] [nvarchar](50) NOT NULL, > > > [UserAdded] [int] NOT NULL, > > > [DateAdded] [datetime] NOT NULL, > > > [UserEdited] [int] NULL, > > > [DateEdited] [datetime] NULL, > > > CONSTRAINT [PK_tblCWTRatingGroups] PRIMARY KEY CLUSTERED > > > ( > > > [Id] ASC > > > )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY > > > = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 20) > > > ON [PRIMARY] > > > ) ON [PRIMARY] > > > > That was taken straight from SQL Server Management Studio.... > > > > Thank you, > > > Josh > > > > On Mar 27, 1:29 pm, James Gregory <[email protected]> wrote: > > > > > Just to confirm, your columns in your database definitely are nullable? > > > > > On Fri, Mar 27, 2009 at 5:59 PM, joshlrogers <[email protected]> > > wrote: > > > > > > Hello, > > > > > > I am having an issue with nullable fields. I have specified the > > > > > valuetypes as being nullable, respectively DateTime? and int?. The > > > > > constructor of the class sets these values to null as well. My > > > > > mapping is as such: > > > > > > <?xml version="1.0" encoding="utf-8" ?> > > > > > <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" > > > > > assembly="TEAMS_ORM"> > > > > > <class name ="TEAMS_ORM.CWTRatingGroup,TEAMS_ORM" > > > > > table="tblCWTRatingGroups"> > > > > > > <id name="Id" column="Id" type="Int32" > > unsaved-value="-1"> > > > > > <generator class="native" /> > > > > > </id> > > > > > > <property name="Name" column="Name" length="50" > > > > > type="String" not- > > > > > null="true" unique="true" /> > > > > > <property name="UserAdded" column="UserAdded" > > type="Int32" > > > > > not- > > > > > null="true" /> > > > > > <property name="DateAdded" column="DateAdded" > > > > > type="DateTime" not- > > > > > null="true" /> > > > > > <property name="UserEdited" column="UserEdited" > > type="Int32" > > > > > not- > > > > > null="false" /> > > > > > <property name="DateEdited" column="DateEdited" > > > > > type="DateTime" not- > > > > > null="false" /> > > > > > > </class> > > > > > > </hibernate-mapping> > > > > > > UserEdited and DateEdited are the required fields. When I make > > > > > updates or saves to the db it will successfully pass nulls. However > > > > > when it retrieves from the DB and the fields are NULL it populates > > the > > > > > fields with arbitrary values however I need them to be null. This is > > > > > my retrieve query: > > > > > > return (List<CWTRatingGroup>)session.CreateQuery("select from > > > > > TEAMS_ORM.CWTRatingGroup").List<CWTRatingGroup>(); > > > > > > How do I achieve this? > > > > > > Thank you in advance, > > > > > Josh --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
