perf: 优化标签绑定，仅绑定到资产上

apps/labels/mixins.py

@@ -1,5 +1,6 @@
 from django.contrib.contenttypes.fields import GenericRelation
 from django.db import models
+from django.db.models import OneToOneField
 
 from .models import LabeledResource
 
@@ -12,10 +13,25 @@ class LabeledMixin(models.Model):
     class Meta:
         abstract = True
 
+    @classmethod
+    def label_model(cls):
+        pk_field = cls._meta.pk
+        model = cls
+        if isinstance(pk_field, OneToOneField):
+            model = pk_field.related_model
+        return model
+
+    @property
+    def real(self):
+        pk_field = self._meta.pk
+        if isinstance(pk_field, OneToOneField):
+            return getattr(self, pk_field.name)
+        return self
+
     @property
     def labels(self):
-        return self._labels
+        return self.real._labels
 
     @labels.setter
     def labels(self, value):
-        self._labels.set(value, bulk=False)
+        self.real._labels.set(value, bulk=False)