Fix groups in post_init

AdrienVannson · AdrienVannson · commit f8e7e541a4bb · 2024-11-11T14:40:08.000+01:00
diff --git a/src/betterproto/__init__.py b/src/betterproto/__init__.py
@@ -763,7 +763,10 @@ def __post_init__(self) -> None:
             if meta.group:
                 group_current.setdefault(meta.group)
 
-            # value = self.__raw_get(field_name)
+                value = self.__raw_get(field_name)
+                if value is not None:
+                    group_current[meta.group] = field_name
+
             # if value is not PLACEHOLDER and not (meta.optional and value is None):
             #     # Found a non-sentinel value
             #     all_sentinel = False
