Problems in admin/form with primary keys in an abstract superclass

[trott@…]

My models.py has an abstract superclass, which defines (beside other things) the primary key (as a UID):

class StdHeader(models.Model):

"""
Standard header. Each database relation starts with these attributes.
"""
pkey = models.CharField(max_length=40, primary_key=True, editable=True) # primary key; an UID

def save(self):

"""update of all std header attributes"""
#...
if self.pkey == None or len(self.pkey)==0:

self.pkey = uids.uid(self.class.name)

super(StdHeader,self).save()

class Meta:

abstract = True

Now: in later SVN versions (specifically in SVN 8785) there are "KeyErrors"
in dependend Models:

I.E:
class Person(StdHeader):

familyname = models.CharField(_('Familyname'),max_length=30)
#...

class Address(StdHeader):

person = models.ForeignKey(Person, null=True, to_field="pkey")
street = models.CharField(max_length=40, blank=True)
#...

Adding a record to Person results in:

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/template/loader_tags.py", line 123, in render

return t.render(context)

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/template/init.py", line 176, in render

return self.nodelist.render(context)

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/template/init.py", line 768, in render

bits.append(self.render_node(node, context))

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/template/debug.py", line 81, in render_node

raise wrapped

TemplateSyntaxError: Caught an exception while rendering: "Key 'pkey' not found in Form"

Original Traceback (most recent call last):

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/template/debug.py", line 71, in render_node

result = node.render(context)

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/template/defaulttags.py", line 148, in render

nodelist.append(node.render(context))

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/template/debug.py", line 87, in render

output = force_unicode(self.filter_expression.resolve(context))

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/template/init.py", line 535, in resolve

obj = self.var.resolve(context)

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/template/init.py", line 676, in resolve

value = self._resolve_lookup(context)

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/template/init.py", line 711, in _resolve_lookup

current = current()

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/contrib/admin/helpers.py", line 134, in pk_field

return AdminField(self.form, self.formset._pk_field.name, False)

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/contrib/admin/helpers.py", line 77, in init

self.field = form[field] # A django.forms.BoundField instance

File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/forms/forms.py", line 105, in getitem

raise KeyError('Key %r not found in Form' % name)

KeyError: "Key 'pkey' not found in Form"

Note: There might be a relation to ticket #8562 as i got the same trace when editing/saving.