fix _process_relationships for Sync client

Author: BeArchiTek

infrahub_sdk/node/node.py

@@ -1493,15 +1493,15 @@ def _process_relationships(
         for rel_name in self._relationships:
             rel = getattr(self, rel_name)
             if rel and isinstance(rel, RelatedNodeSync):
-                relation = node_data["node"].get(rel_name)
-                if relation.get("node", None):
+                relation = node_data["node"].get(rel_name, None)
+                if relation and relation.get("node", None):
                     related_node = InfrahubNodeSync.from_graphql(
                         client=self._client, branch=branch, data=relation, timeout=timeout
                     )
                     related_nodes.append(related_node)
             elif rel and isinstance(rel, RelationshipManagerSync):
-                peers = node_data["node"].get(rel_name)
-                if peers:
+                peers = node_data["node"].get(rel_name, None)
+                if peers and peers["edges"]:
                     for peer in peers["edges"]:
                         related_node = InfrahubNodeSync.from_graphql(
                             client=self._client, branch=branch, data=peer, timeout=timeout