To have it populated from the DB but not persisted, you should be able to set insert="false" and update="false" on the <property> element in the mapping.
On Wed, Oct 22, 2008 at 5:03 AM, Keith Bloom <[EMAIL PROTECTED]> wrote: > > Sorry for the confusion and I'm starting to come to the same > conclusion that prices should be a class. > > For me this has now spun off in to an exploration to find out how a > collection of composite-elements work in NH. It would be great if I > could have a property that NH populated from the database but left > ignored when the writing back to the database. > > > On 20 Oct, 11:41, Jason Meckley <[EMAIL PROTECTED]> wrote: > > I'm confused now. you can set read-only access for the code by using > > nosetter access types and still allowing NH to hydrate the object. if > > you mean NH should not populate the element, than your class (not > > component) is readonly (mutable = false) or you don't map the value in > > NH. If the access is mapped in NH than it can read/write the value. It > > wouldn't make sense to only write values with NH. > > > > On Oct 20, 4:29 am, Keith Bloom <[EMAIL PROTECTED]> wrote: > > > > > Hi Jason, > > > > > Thanks for the idea but NHibernate still attempts to insert a value > > > but this time in the field instead of the property. I've also tried > > > setting generated="always" but this is ignored. > > > > > Do you know if the property settings for composite-elements and > > > classes are the same? > > > > > Thanks, Keith > > > > > On 17 Oct, 16:04, Jason Meckley <[EMAIL PROTECTED]> wrote: > > > > > > just set the access attribute to nosetter.camelcase or whatever > naming > > > > strategy you use. > > > > > > On Oct 17, 10:19 am, Keith Bloom <[EMAIL PROTECTED]> wrote: > > > > > > > Hello, > > > > > > > Does anyone know if this: > > > > > > > <class name="Holiday" table="holidays"> > > > > > // ... Some properties .. > > > > > > > <set name="Prices" table="Prices"> > > > > > <composite-element class="Price"> > > > > > <parent name="Holiday" /> > > > > > <property name="Id" column="id" insert="false" > update="true"/ > > > > > > > <property name="PricePerUnit" /> > > > > > <property name="UnitsFrom" /> > > > > > <property name="UnitTo" /> > > > > > </composite-element> > > > > > </set> > > > > > </class> > > > > > > > or something along these lines, is possible? > > > > > > > The reason is I have a set of immutable prices in my model which is > a > > > > > combination of the price, units and the holiday. In the database > the > > > > > price row also gets a seeded Id. It would be very useful to have > this > > > > > as a read only property but if I add it to the Price class > NHibernate > > > > > kindly attempts to but a value in it. > > > > > > > As a workaround I'm using the HashCode as a identifier but this > feels > > > > > like a hack. > > > > > > > Many thanks, Keith. > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
