fix: singleton load and save

config/models.py

@@ -1,5 +1,6 @@
 from django.db import models
 from django.core.cache import cache
+from django.forms.models import model_to_dict
 
 
 class SingletonModel(models.Model):
@@ -7,16 +8,23 @@ class SingletonModel(models.Model):
         abstract = True
 
     def save(self, *args, **kwargs):
+        cache_key = f"{self._meta.model_name}_singleton_key"
         self.pk = 1
         super(SingletonModel, self).save(*args, **kwargs)
 
+        # Reset cache
+        data = model_to_dict(self)
+        cache.set(cache_key, data, 60 * 60 * 24)
+
     def delete(self, *args, **kwargs):
         pass
 
     @classmethod
     def load(cls):
         cache_key = f"{cls._meta.model_name}_singleton_key"
-        if not (data := cache.get(cache_key)):
+        data = cache.get(cache_key)
-            data = cls.objects.values().get(pk=1)
+        if not data:
+            instance, created = cls.objects.get_or_create(pk=1)
+            data = model_to_dict(instance)
             cache.set(cache_key, data, 60 * 60 * 24)
         return cls(**data)