chapeau/django_kepi/something_model.py

119 wiersze
3.2 KiB
Python

from django.db import models
from django_kepi import object_type_registry
from django_kepi.cache_model import Cache
from django.contrib.contenttypes.fields import GenericForeignKey
from django.contrib.contenttypes.models import ContentType
from django_kepi.models import Activity
import logging
logger = logging.getLogger(name='django_kepi')
#######################
class ActivityModel(models.Model):
def save(self, *args, **kwargs):
we_are_new = self.pk is None
super().save(*args, **kwargs)
if we_are_new:
logger.debug('New activity: %s',
str(self.activity_form))
logger.debug('We must create a Create wrapper for it.')
wrapper = Activity.create({
'type': 'Create',
'actor': self.activity_actor,
'to': self.activity_to,
'cc': self.activity_cc,
'object': self.activity_id,
})
wrapper.save()
logger.debug('Created wrapper %s',
str(wrapper.activity_form))
# XXX We copy "to" and "cc" per
# https://www.w3.org/TR/activitypub/#object-without-create
# which also requires us to copy
# the two blind versions, and "audience".
# We don't support those (atm), but
# we should probably copy them anyway.
@property
def activity_to(self):
# FIXME
return ["https://www.w3.org/ns/activitystreams#Public"]
@property
def activity_cc(self):
# FIXME
return ["https://marnanel.org/users/marnanel/followers"]
#######################
class SomethingManager(models.Manager):
f_type = None
def get_queryset(self):
# This is an empty QuerySet; it's here because
# it sets the type of the objects in the result.
result = models.QuerySet(
model = self.parent_model,
)
cache_query = Cache.objects.filter(f_type=self.f_type)
cache_query.annotate(
is_local = models.Value(
False
),
content_type = models.Value(
ContentType.objects.get_for_model(Cache),
),
)
handlers = [
cache_query,
]
for h in object_type_registry[self.f_type]:
query = h.objects.all()
query.annotate(
is_local = models.Value(
True,
),
content_type = models.Value(
ContentType.objects.get_for_model(h),
),
)
handlers.append(query)
return result.union(*handlers)
#######################
class Person(models.Model):
f_type = 'Person'
objects = SomethingManager()
objects.f_type = f_type
content_type = models.ForeignKey(
ContentType,
on_delete=models.CASCADE,
),
content_object = GenericForeignKey(
'content_type',
'url',
),
class Meta:
managed = False
Person.objects.parent_model = Person # this is ugly