Ticket #8307: images.py.diff

core/files/images.py

@@ -21 +21 @@
 
     def _get_image_dimensions(self):
         if not hasattr(self, '_dimensions_cache'):
-            self._dimensions_cache = get_image_dimensions(self)
+            if self.field.width_field and self.field.height_field:
+                width = getattr(self.instance, self.field.width_field)
+                height = getattr(self.instance, self.field.height_field)
+                self._dimensions_cache = (width, height)
+            else:
+                self._dimensions_cache = get_image_dimensions(self)
         return self._dimensions_cache
 
 def get_image_dimensions(file_or_path):