Hi,
what I'm trying to do seems to be a little hard. I've got three
model-classes:
class A(models.Model):
...
class B(models.Model):
...
class C(models.Model):
a = models.ForeignKey(A)
b = models.ForeignKey(B)
...
class Meta:
unique_together = ('a', 'b')
...
In admin.py C is defined as a inline of B. I'm now trying to add inlines
of C for each instance of A (that already works). Plus I want to preset
the foreign keys to A in the inline forms & make it the only available
choice - each inline gets it's own instance of A.
Here is want I already did in admin.py:
class CInline(admin.TabularInline):
model = C
...
def formfield_for_foreignkey(self, db_field, request, **kwargs):
if db_field.name == 'a':
a = self.as[self.a_counter]
self.a_counter = (self.a_counter + 1) % len(self.as)
kwargs["queryset"] = A.objects.filter(pk=a.id) # bad for
performance
db_field.default = a
return super(CInline, self).formfield_for_foreignkey(db_field,
request, **kwargs)
class BAdmin(admin.ModelAdmin):
model = B
inlines = ( CInline, )
def add_view(self, request, form_url='', extra_context=None):
inline = self.inlines[0]
inline.max_num = len(a.objects.all())
inline.extra = len(a.objects.all())
inline.language_counter = 0
inline.languages = a.objects.all()
return super(BAdmin, self).add_view(request, form_url,
extra_context)
Problem is that formfield_for_foreign doesn't seem to be called for all
foreign_keys in each inline element of the add page. Or maybe the
formfield gets reused.
The result is that all inline elements get the same queryset and default
value.
I'm a lithe bit stuck here. Maybe there is a complete other way to solve
my problem.
Cheers
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