override cache name

anchor/admin.py

@@ -42,6 +42,8 @@ def save_m2m(self):
 class AttachmentAdmin(admin.ModelAdmin):
     list_display = ("blob", "name", "order", "content_type", "object_id")
     raw_id_fields = ("blob",)
+    list_filter = ("content_type",)
+    search_fields = ("id", "object_id", "blob__id")
 
     def get_queryset(self, request):
         return (

anchor/models/fields/single_attachment.py

@@ -5,11 +5,18 @@
 from django.db import models
 from django.db.models import Model
 from django.db.models.fields.related_descriptors import ReverseOneToOneDescriptor
+from django.utils.functional import cached_property
 from django.utils.text import capfirst
 
 from anchor.models import Attachment, Blob
 
 
+class SingleAttachmentRel(GenericRel):
+    @cached_property
+    def cache_name(self):
+        return self.field.attname
+
+
 class ReverseSingleAttachmentDescriptor(ReverseOneToOneDescriptor):
     def __init__(
         self,
@@ -105,6 +112,8 @@ def instance_attr(i):
 
 
 class SingleAttachmentField(GenericRelation):
+    rel_class = SingleAttachmentRel
+
     def __init__(
         self,
         upload_to: str | Callable[[Blob], str] = None,

demo/demo/settings.py

@@ -130,6 +130,7 @@
             "querystring_auth": True,
             "querystring_expire": 600,
             "signature_version": "s3v4",
+            "file_overwrite": False,
         },
     }
 

demo/movies/models.py

@@ -11,6 +11,12 @@ class Movie(models.Model):
         upload_to="movie-covers", blank=True, help_text="A colorful image of the movie."
     )
 
+    credits = SingleAttachmentField(
+        upload_to="movie-credits",
+        blank=True,
+        help_text="A screenshot of the movie credits screen.",
+    )
+
     def get_absolute_url(self):
         return reverse("movies:movie_detail", kwargs={"pk": self.pk})