Fabio, thanks for the hint. I've solved it using filters (defined programatically) and an interceptor. Just in case that someone is interested I've described my solution here: http://blog.schuager.com/2009/02/contextual-data-using-nhibernate.html
Regards. On Wed, Feb 11, 2009 at 10:35 AM, Fabio Maulo <[email protected]> wrote: > NH filtering is a great feature.Fliters are applied as expected in a lot > of query but... not in all (we have one open bug about it). > Before implement some strange thing try "Filters". > > > 2009/2/11 Germán Schuager <[email protected]> > > Hi, >> I have the following requirement: >> >> I need to introduce the concept of "Mode of execution" in my application: >> * Certain classes provide a Mode property. >> * The instances of this classes will be only visible when the current >> application Mode of execution is equal to its Mode property value. >> * New instances need to be asigned the current Mode of execution before >> persisting them. >> >> Currently my services call catRepository.GetAll() and this get traduced to >> hql "from Cat". I see 2 options here: >> * implementing the requirement in the application layer means that the >> services need to be changed to use catRepository.GetAllWithMode(mode) >> explicitly (lots of places to modify) >> * implementing the requirement in the domain/data layer in a generic way >> means that the GetAll() call would be traduce to hql "from Cat c where >> c.Mode = currentMode" >> >> I've been thinking in the following solution: >> >> public interface IModeAware >> { >> Mode Mode { get; set; } >> } >> >> Using interceptors or event listeners I would asign the current Mode of >> execution to every implementor of IModeAware before persisting it. >> My problem is to query those classes... I've thought about using filters >> but I've found 2 minor issues: >> 1. I haven't found a way to enable/disable a filter at SessionFactory >> scope, it needs to be done for each Session that is created. >> 2. I need to define the same filter in the mapping of each class >> implementing IModoAware (is there any way to specify polymorphic filters?) >> >> >> To sum up, as I've never used these features before I'm looking for some >> advice about whether this approach will get me into trouble (that I'm not >> seeing) or if I should be ok. >> >> >> >> > > > -- > Fabio Maulo > > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
