Update app.py

app.py

@@ -137,12 +137,14 @@ def invoke(openai_api_key, rag_option, prompt):
             db = document_retrieval_chroma(llm, prompt)
             completion = rag_chain(llm, prompt, db)
             result = completion["result"]
+            completion = completion.toJSON()
         elif (rag_option == "MongoDB"):
             #splits = document_loading_splitting()
             #document_storage_mongodb(splits)
             db = document_retrieval_mongodb(llm, prompt)
             completion = rag_chain(llm, prompt, db)
             result = completion["result"]
+            completion = completion.toJSON()
         else:
             result = llm_chain(llm, prompt)
             completion = result