Im getting confused here with a one to one mapping. I dont understand why I get a property-ref not found: AddressTypeID in class: AddressType when I can see in the c# code that the property AddressTypeID is definately in the AddressType class.

Setup:
Address table has 1-1 relationship to AddressType table.
f-key in address table to addressTypeID in addressType.

I have only declared the one-to-one relationship in the address.hbm.xml file. Heres what part of my Address mapping file looks like:



With the classes the Address object stores a reference to an AddressType object and takes an AddressType in the constructor. The Address object also contains a Property which gets/sets an AddressType. There is no property in the Address class which would set the field it has for f-key integer value it should get from the AddressType class.

I hope someone can give a few clues. Thanks.

How does the mapping for the AddressType look? By the way, do you really have a 1-1 relationship? Can there only be one Address in the table for each AddressType?

I understand that the db relationship is a one-to-many AddressType can be re-used for many Addresses. The reason I did not map this way in my xml is because another developer said the way the mapping works is based on the business relationship not the db relationship. I took that to mean from the class point of view the Address class has a single ref to a single AddressType.
For starters is this approach correct?
Anyhow heres the bulk of my AddressType xml file. The AddressType class has no ref to the Address class.



Gareth

Hmm, do you have an AddressTypeID column in your Address table? If yes,
then you actually have a <many-to-one> there, not <one-to-one>. Property-ref is used when the relationship is made using some property that isn't a primary key, which is not your case, so just use plain <many-to-one name="AddressType" column="AddressTypeID" />.