moviewyrm/bookwyrm/models/base_model.py
2021-03-22 16:19:02 -07:00

46 lines
1.5 KiB
Python

""" base model with default fields """
from django.db import models
from django.dispatch import receiver
from bookwyrm.settings import DOMAIN
from .fields import RemoteIdField
class BookWyrmModel(models.Model):
""" shared fields """
created_date = models.DateTimeField(auto_now_add=True)
updated_date = models.DateTimeField(auto_now=True)
remote_id = RemoteIdField(null=True, activitypub_field="id")
def get_remote_id(self):
""" generate a url that resolves to the local object """
base_path = "https://%s" % DOMAIN
if hasattr(self, "user"):
base_path = "%s%s" % (base_path, self.user.local_path)
model_name = type(self).__name__.lower()
return "%s/%s/%d" % (base_path, model_name, self.id)
class Meta:
""" this is just here to provide default fields for other models """
abstract = True
@property
def local_path(self):
""" how to link to this object in the local app """
return self.get_remote_id().replace("https://%s" % DOMAIN, "")
@receiver(models.signals.post_save)
# pylint: disable=unused-argument
def set_remote_id(sender, instance, created, *args, **kwargs):
""" set the remote_id after save (when the id is available) """
if not created or not hasattr(instance, "get_remote_id"):
return
if not instance.remote_id:
instance.remote_id = instance.get_remote_id()
try:
instance.save(broadcast=False)
except TypeError:
instance.save()