heya,
I'm trying to use an "Address" model as a generic relation against
multiple other models (e.g. in a "User Profile", for each User, as
well as for "Building", "Institution", and various other ones).
So I've added the content_type, object_id and content_object fields to
Address.
class Address(models.Model):
"""
Basic object for holding address information - for either people
or institutions.
"""
street_address = models.CharField(max_length=50)
suburb = models.CharField(max_length=20)
state = models.CharField(max_length=3,
choices=AUSTRALIAN_STATES_CHOICES)
# PositiveIntegerField doesn't allow max_length? Have to use form
validation for this.
postcode = models.CharField(max_length=4)
# This should probably be a list of choices.
country = models.CharField(max_length=20)
address_category = models.OneToOneField(AddressCategory)
# We make Address a generic relation model
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()
content_object = generic.GenericForeignKey('content_type',
'object_id')
class Meta:
verbose_name_plural = 'Addresses'
def __unicode__(self):
return self.street_address + ', ' + self.suburb
And my other objects have GenericRelations to Address. E.g.:
class Hospital(models.Model):
name = models.CharField(max_length=20)
address = generic.GenericRelation(Address)
def __unicode__(self):
return self.name
However, when I try and use the Django admin to add an Address item,
the form has fields for content_type and object_id. I had thought
these fields wouldn't appear? Also, the model won't validate/save if I
don't fill in these fields. I don't think I'm quite using this right -
is there a better way of doing what I'm trying to achieve here?
Also, I'm using the Address object as in Inline for the other models,
so I have an Address Inline as well (Nb: I'm using django-reversion
with this site, hence the "VersionAdmin")
class AddressAdmin(VersionAdmin):
pass
class AddressInline(generic.GenericTabularInline):
model = Address
...
class HospitalAdmin(admin.ModelAdmin):
inlines = [
AddressInline,
]
...
admin.site.register(Address, AddressAdmin)
Thanks,
Victor
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