moviewyrm/bookwyrm/models/base_model.py

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''' base model with default fields '''
from django.db import models
from django.dispatch import receiver
from bookwyrm.settings import DOMAIN
from .fields import RemoteIdField
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class BookWyrmModel(models.Model):
''' shared fields '''
created_date = models.DateTimeField(auto_now_add=True)
updated_date = models.DateTimeField(auto_now=True)
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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'):
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base_path = '%s%s' % (base_path, self.user.local_path)
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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
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@property
def local_path(self):
''' how to link to this object in the local app '''
return self.get_remote_id().replace('https://%s' % DOMAIN, '')
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@receiver(models.signals.post_save)
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#pylint: disable=unused-argument
def execute_after_save(sender, instance, created, *args, **kwargs):
''' set the remote_id after save (when the id is available) '''
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if not created or not hasattr(instance, 'get_remote_id'):
return
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if not instance.remote_id:
instance.remote_id = instance.get_remote_id()
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try:
instance.save(broadcast=False)
except TypeError:
instance.save()