fixed storage context update & service context issue (#11475)

llama-index-core/llama_index/core/indices/knowledge_graph/base.py

@@ -259,10 +259,9 @@ class KnowledgeGraphIndex(BaseIndex[KG]):
         self._graph_store.upsert_triplet(*triplet)
         triplet_str = str(triplet)
         if include_embeddings:
-            set_embedding = self._service_context.embed_model.get_text_embedding(
-                triplet_str
-            )
+            set_embedding = self._embed_model.get_text_embedding(triplet_str)
             self._index_struct.add_to_embedding_dict(str(triplet), set_embedding)
+            self._storage_context.index_store.add_index_struct(self._index_struct)
 
     def add_node(self, keywords: List[str], node: BaseNode) -> None:
         """Add node.
@@ -300,10 +299,9 @@ class KnowledgeGraphIndex(BaseIndex[KG]):
         self.add_node([subj, obj], node)
         triplet_str = str(triplet)
         if include_embeddings:
-            set_embedding = self._service_context.embed_model.get_text_embedding(
-                triplet_str
-            )
+            set_embedding = self._embed_model.get_text_embedding(triplet_str)
             self._index_struct.add_to_embedding_dict(str(triplet), set_embedding)
+            self._storage_context.index_store.add_index_struct(self._index_struct)
 
     def _delete_node(self, node_id: str, **delete_kwargs: Any) -> None:
         """Delete a node."""