NHibernate和拦截器在聚合根中

Question

Assuming that object A has a list of B objects, and B is linked to a C one.

Using NHibernate, if I update as C instance, how can I be notified that "something" linked to one instance (and which instance) of A has been updated ?

Using interceptor I know that C has been updated, but how to follow the way C -> B -> A automatically (C doesn't know B for instance, and C is not always aggregate root).

Answer 1

Depending on the specifics of your mapping, you can always search for the linked B entities every time an entity C is modified. Given that B is related to C by a foreign key relationship, you can search for all B (or the single B ), which has a foreign key equal to the C entity primary key.

If at the same time B does not know about A , you can use a similar procedure to notify which instance of A it is related to. Or, if in the other hand B has a link to A , you can use that relationship instead.

The specific implementation would depend on how exactly are you mapping these entities together.