Why are you guys over complicating this? It is really simple. The mapping looks like this: <property name=”OrganizationType”></property> The model property looks like this: public virtual OrganizationTypes OrganizationType { get; set; } The Enum looks like this: public enum OrganizationTypes { NonProfit = 1, ForProfit = 2 } NHibernate will automatically figure it all out. … Read more
Configure Log4Net for use with NHibernate may be helpful. You need to have both these loggers: <logger name=”NHibernate”> <level value=”ERROR” /> </logger> <logger name=”NHibernate.SQL”> <level value=”ERROR” /> </logger>
Chapter 9 covers all of this better than I can: http://nhibernate.info/doc/nh/en/index.html But cliff notes: Save() takes a new object without an identifier and attaches it to the session. The object will be INSERT‘d. Update() takes an existing object that has an identifier but is not in the session and attaches it to the session. The … Read more
As Matthieu says, the only case where you wouldn’t want to set inverse = true is where it does not make sense for the child to be responsible for updating itself, such as in the case where the child has no knowledge of its parent. Lets try a real world, and not at all contrived … Read more
You are getting the first error because, when you remove the items from the collection, NHibernate’s default mode of operation is to simply break the association. In the database, NHibernate tries to set the foreign key column on the child row to null. Since you do not allow nulls in that column, SQL Server raises … Read more
Use collection interfaces instead of concrete collections, so NHibernate can inject it with its own collection implementation. In this case, use IList<int> instead of List<int>
The way to define this convention changed sometimes ago, it’s now : public class EnumConvention : IUserTypeConvention { public void Accept(IAcceptanceCriteria<IPropertyInspector> criteria) { criteria.Expect(x => x.Property.PropertyType.IsEnum); } public void Apply(IPropertyInstance target) { target.CustomType(target.Property.PropertyType); } }
This is from section 10.7. Automatic state detection of the Hibernate Reference Documentation: saveOrUpdate() does the following: if the object is already persistent in this session, do nothing if another object associated with the session has the same identifier, throw an exception if the object has no identifier property, save() it if the object’s identifier … Read more
Functionally they do the same thing, create a join to another entity. The only difference is what they return. JoinQueryOver returns a new QueryOver with the current entity being the entity joined, while JoinAlias returns the original QueryOver that has the current entity as the original root entity. Whichever one you use is a matter … Read more
The inverse attribute must not be set to true … You use the inverse attribute to specify the ‘owner’ of the association. (An association can have only one owner, so one end has to be set to inverse, the other has to be set to ‘non inverse’). (Owner: inverse=false; Non-owner: inverse=true) In a one-to-many association, … Read more