How can I map a relationship in nHibernate?

Question

Schema:

• Users
  • ID
  • Name
  • Password
• Address
  • ID
  • Street
  • UserID

Both tables have an ID field (guid).

Code:

User u = new User();
u.Address.Street = "test";
session.Save(u);

How can I create a mapping file to use the UserID from the address table to point to the ID from the Users table and reflect my sample code above?

Answer 1

In most of the cases, such kind of mapping should lead to a 'component'.
In your case, Address could be a component of User. This means that you'll have indeed an Adress class, and the User class will have a property of type Adress, but the Address is saved in the Users table in the DB.

If you really want a one-to-one mapping with the DB layout like you want, I suggest you create a one-to-one mapping in the User mapping, and a many-to-one mapping in the Address mapping (with unique set to true). But, I think that this also means that you will be responsible of deleting the old address first if you update the adress of a user ...

Answer 2

Using many-to-one i sucessfully solve my problem.

but i go search more samples!!

thanks!!