fix: handle updates where no previous obj... (#915)

is in the cache.

Author: AstreaTSS

interactions/api/gateway/client.py

@@ -405,11 +405,18 @@ def _dispatch_event(self, event: str, data: dict) -> None:
 
                 elif "_update" in name and hasattr(obj, "id"):
                     old_obj = self._http.cache[model].get(id)
-                    copy = model(**old_obj._json)
-                    old_obj.update(**obj._json)
+
+                    if old_obj:
+                        before = model(**old_obj._json)
+                        old_obj.update(**obj._json)
+                    else:
+                        before = None
+                        old_obj = obj
+
                     _cache.add(old_obj, id)
+
                     self._dispatch.dispatch(
-                        f"on_{name}", copy, old_obj
+                        f"on_{name}", before, old_obj
                     )  # give previously stored and new one
                     return