Hi, This only implies on objects loaded in the session !!! Delete-orphan deletes orphans as long as they are not referenced by any other object in the session
Kind regards Nexus On Oct 1, 11:18 am, csetzkorn <[email protected]> wrote: > Hi, > > Sure that makes sense. However, I thought that NHibernate takes care > of this (implements transparent persistence) as I use: > > delete-orphan > > My understanding of this is that the persistence manager is clever > enough to leave the city 'alone' if another 'object' is associated > with it (i.e. does not attempt to delete - only if it is the 'last > city'). > > Thanks. > > Christian > > On Sep 30, 2:15 pm, Lionel Orellana <[email protected]> wrote: > > > The error message doesn't say that the city was not found. > > > You are trying to delete a City that is referenced by another Address. > > It's the foreign key constraint that's kicking in. > > > Lionel. > > > On Sep 29, 6:08 am,csetzkorn<[email protected]> wrote: > > > > Sorry. The exact exception is: > > > > {"could not delete: [Bla.Domain.City#3][SQL: DELETE FROM Cities WHERE > > > CityId = ?]"} > > > > Is there something wrong with the mapping file? I tend to keep it in > > > one file. Seems to work fine. > > > > C > > > > On Sep 28, 8:41 pm, Fabio Maulo <[email protected]> wrote: > > > > > You are writing too much in the mapping... > > > > btw"city cannot be found although it definitely exist." > > > > is not an NH's exception message. > > > > > 2009/9/28csetzkorn<[email protected]> > > > > > > Hi, > > > > > > Thanks I noticed the typo myself. Now it seems to work for the last > > > > > object that has a reference to the city (here it is ok to delete the > > > > > ‘last city’) but not for any objects ‘before’. I get an exception that > > > > > the city cannot be found although it definitely exist. > > > > > > Here are some fractions of my mapping file: > > > > > > ... > > > > > <joined-subclass > > > > > name="Address" table="Addresses" dynamic-update="true"> > > > > > <key foreign-key="ItemIdAddress" column="AddressId"></key> > > > > > ... > > > > > <many-to-one name="City" class="City" column="CityId" cascade="delete- > > > > > orphan" /> > > > > > ... > > > > > </joined-subclass> > > > > > ... > > > > > <class name="City" table="Cities"> > > > > > > <id name="CityId" unsaved-value="0"> > > > > > <column name="CityId" sql-type="bigint"/> > > > > > <generator class="identity" /> > > > > > </id> > > > > > > <property name="CityName" > > > > > > <column name="CityName" not-null="true" sql-type="char(100)"/> > > > > > </property> > > > > > > </class> > > > > > > I am using generic DAOs for all my classes. This is the code for > > > > > deletion: > > > > > > ... > > > > > public void MakeTransient(T entity) > > > > > { > > > > > Session.Delete(entity); > > > > > Session.Flush(); > > > > > } > > > > > ... > > > > > > Looking forward to hearing from you. > > > > > > BTW is there a good book/paper/etc. with examples of more complicated > > > > > scenarios of modelling and implementing different relationships plus > > > > > DAO code exacmples. I have NHibernate in Action which only seems to > > > > > touch the surface. > > > > > > Thanks. > > > > > > Christian > > > > > > On Sep 28, 4:41 pm, Fabio Maulo <[email protected]> wrote: > > > > > > It is only a TYPO : It is "delete-orphan" and not "delete-orphans" > > > > > > > 2009/9/28csetzkorn<[email protected]> > > > > > > > > Hi, > > > > > > > > Can I use: > > > > > > > > <many-to-one name="City" class="City" column="CityId" > > > > > > > cascade="delete- > > > > > > > orphans" /> > > > > > > > > I get: > > > > > > > > Unsupported cascade style: delete-orphans > > > > > > > > although it says here (or not?): > > > > > > > >http://groups.google.com/group/fluent-nhibernate/browse_thread/thread. > > > > > .. > > > > > > > > That I can use it. > > > > > > > > Thanks. > > > > > > > > Christian > > > > > > > -- > > > > > > Fabio Maulo- Hide quoted text - > > > > > > > - Show quoted text - > > > > > -- > > > > Fabio Maulo- Hide quoted text - > > > > > - Show quoted text -- Hide quoted text - > > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
