NH is based on Hibernate, in java everything is virtual if you don't finalize it...so it is very natural to request NH properties to be virtual...i don't follow on why wou will want to avoid them...
In any case it is very easy to follow what you need from the employee and fetch it. You may check Udi's ideas http://www.udidahan.com/2007/09/16/fetching-strategy-nhibernate-implementation-available/ I remember something similar from Ayende, but i cannot find the link. Gustavo. On Fri, Mar 27, 2009 at 8:08 PM, Peter Morris <[email protected]> wrote: > > >I mean, i have a service, i request an object, i don't know why i'm asking > > for it? > > Correct. > > > > In general for a really complex system I build a DTO to send to the > > client, > > Imagine the app manages the automatic payment of allowances on a period > basis. The client has just indicated that Employee#1 should have their > allowances payed immediately, so the app layer would look something like > this > > > public void PayImmediately(int employeeNumber) > { > //Get employee > Employee emp = EmployeeRepository.GetByEmployeeNumber(employeeNumber); > > //Make payments > AllowanceService.PayAllowances(emp.CurrentAssignment); > } > > Now this is all happening within a single ISession (I'm just not showing > that part). When the EmployeeRepository fetches the Employee it only > fetches the Employee state, for the AllowanceService.PayAllowances to work > it needs lots of information such as which allowances have been assigned to > the employee, this is fine though because they are multi-associations and > as > such can easily be fetched on demand, but what about the single links? > > For example, here I am asking for allowances from the employee's current > assignment. The current assignment is a single-link, but the repository > has > no way of knowing I was going to need that and so it didn't fetch it. In > this case the Employee isn't mapped to eagerly fetch CurrentAssignment > because it is only used in about 50% of the time, so unless I use proxies + > mark my properties virtual the service is going to read it as NULL isn't > it? > But then if I do use proxies I am going to run into this polymorphic > multi-association bug because Allowance is a base class form which I > descend > multiple classes (allowance types). Apart from which, the idea of making > my > properties virtual makes me feel ill :-) > > Pete > ==== > http://mrpmorris.blogspot.com > > > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
