Hi all I'm adding an XML mapping feature to Django db models.
The idea is to add as little XML mapping information as possible to existing models (such as: which fields get mapped to XML, what is their XPath...) in order to be able to automatically: 1. produce an XML representation of an object; 2. parse a valid XML representation into a new object; and 3. get an XSD schema of the model. I'm well ahead. I have all three features working for some simple models. But I've hit a wall with regard to object relations, or ForeignKey fields. Apparently any subclasses of ForeignKey are completely ignored by Django at runtime, even if they declare __metaclass__ = SubfieldBase I guess they would need a special kind of metaclass, which I guess has not been written yet. Can anybody help me understand what piece is failing? How can I make it work? -Tobia Here is a (non) working example: ### test/models.py: from django.db.models import * # subclassing works for any simple field type, why not related fields? class MyForeignKey(ForeignKey): __metaclass__ = SubfieldBase def __init__(self, *args, **kwargs): ForeignKey.__init__(self, *args, **kwargs) class TestSub(Model): pass class Test(Model): sub = MyForeignKey(TestSub) ### shell: >>> from test.models import Test, TestSub >>> ts = TestSub.objects.create() >>> t = Test.objects.create(sub=ts) Traceback (most recent call last): ... AttributeError: 'Test' object has no attribute 'sub_id' >>> -- You received this message because you are subscribed to the Google Groups "Django users" group. To view this discussion on the web visit https://groups.google.com/d/msg/django-users/-/ENjhq8ZL_-AJ. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
