I'm having trouble loading external data for a model that uses a
ContentType foreign key.
I'm using a manager in the models, like the docs say. Unfortunately,
although the docs talk about the importance of a get_by_natural_key
method on a ContentType foreign key, it then launches into a different
example instead. I'm having trouble figuring out just what the manager
would look like. My best guess is to use get_by_natural_key again, and
assign app_label and model lookups, but I could be way off.
# models.py
from django.db import models
from django.contrib.contenttypes.models import ContentType
from django.utils.translation import ugettext_lazy as _
class InlineTypeManager(models.Manager):
def get_by_natural_key(self, title, app_label, model):
return self.get(title=title,
content_type=ContentType.objects.get_by_natural_key(app_label=content_type__name,
model=content_type__id))
class InlineType(models.Model):
title = models.CharField(_("title"), max_length=255)
content_type = models.ForeignKey(ContentType,
limit_choices_to={"model__in": ("Link", "Document", "Image", "Audio",
"Video", "MediaSet", "Flash", "Testimonial")})
objects = InlineTypeManager()
class Meta:
ordering = ["title"]
verbose_name = _("inline type")
verbose_name_plural = _("inline types")
def __unicode__(self):
return u"%s" % (self.title)
https://docs.djangoproject.com/en/dev/topics/serialization/#natural-keys
When I loaddata my JSON, I receive the error:
DeserializationError: [u"'image' value must be an integer."]
The point of get_by_natural_key is to load non-integer fields in a
"human-friendly" lookup because hard-coded IDs in the JSON is a bad
idea because of its unpredictability, so I'm guessing my manager is
failing. Or should I use get_for_model()/get_for_models()?
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