Hey Alex, On the trac ticket, I mentioned that my motivating reason for adding specifying default-lazy fields in the Field definition (i.e., without having to specify them on every query set) is the implicit queries that Django creates for foreign key lookups (e.g., item = obj.relateditem causes an implicit SQL query, and I want to avoid loading large text fields on the related item). Also, to a lesser extent, it would be good to avoid loading these columns in select_related().
I hadn't thought before about subclassing Query/QuerySet/Manager/ TextField to do this without changing the installed version of Django. That's an interesting idea. My change did also involve changing Options (i.e., _meta), though. Currently, however, the Query and QuerySet classes are functionally decomposed in a way that makes it hard to override most of this functionality in a subclass without copy-and-pasting a very large amount of code. (Compare, for instance, django.contrib.gis.db.models.sql.Query.get_columns with django.db.models.sql.Query.get_columns.) I just posted a patch to http://code.djangoproject.com/ticket/9368 which would make overriding this functionality somewhat easier. But it would still involve a considerable amount of code duplication if that logic wasn't in the Query base class. -Jesse On Oct 14, 10:00 am, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > I think the sensible solution is to have what the ticket originally > suggested, a queryset/manager method to control whether a field is > lazy loading, and yes, that can be implemented without patching > django, you can, of course, make this the default by overiding the > default manager. > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django developers" group. To post to this group, send email to django-developers@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-developers?hl=en -~----------~----~----~----~------~----~------~--~---
