40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
from django.db import models
|
|
|
|
|
|
class Bookmark(models.Model):
|
|
"""
|
|
A (private) bookmark of a Post by an Identity
|
|
"""
|
|
|
|
identity = models.ForeignKey(
|
|
"users.Identity",
|
|
on_delete=models.CASCADE,
|
|
related_name="bookmarks",
|
|
)
|
|
post = models.ForeignKey(
|
|
"activities.Post",
|
|
on_delete=models.CASCADE,
|
|
related_name="bookmarks",
|
|
)
|
|
|
|
created = models.DateTimeField(auto_now_add=True)
|
|
|
|
class Meta:
|
|
unique_together = [("identity", "post")]
|
|
|
|
def __str__(self):
|
|
return f"#{self.id}: {self.identity} → {self.post}"
|
|
|
|
@classmethod
|
|
def for_identity(cls, identity, posts=None, field="id"):
|
|
"""
|
|
Returns a set of bookmarked Post IDs for the given identity. If `posts` is
|
|
specified, it is used to filter bookmarks matching those in the list.
|
|
"""
|
|
if identity is None:
|
|
return set()
|
|
queryset = cls.objects.filter(identity=identity)
|
|
if posts:
|
|
queryset = queryset.filter(post_id__in=[getattr(p, field) for p in posts])
|
|
return set(queryset.values_list("post_id", flat=True))
|