bug fix (#570)

recipes/use_cases/agents/langchain/langgraph-rag-agent.ipynb

@@ -238,7 +238,7 @@
     "rag_chain = prompt | llm | StrOutputParser()\n",
     "\n",
     "# Run\n",
-    "generation = rag_chain.invoke({\"context\": docs, \"question\": question})\n",
+    "generation = rag_chain.invoke({\"context\": format_docs(docs), \"question\": question})\n",
     "print(generation)"
    ]
   },
@@ -330,6 +330,7 @@
    "source": [
     "from typing_extensions import TypedDict\n",
     "from typing import List\n",
+    "from langchain.schema import Document\n",
     "\n",
     "### State\n",
     "\n",
@@ -346,9 +347,9 @@
     "    question : str\n",
     "    generation : str\n",
     "    web_search : str\n",
-    "    documents : List[str]\n",
+    "    documents : List[Document]\n",
+    "\n",
     "\n",
-    "from langchain.schema import Document\n",
     "\n",
     "### Nodes\n",
     "\n",