fix engine to deal with the latest chroma

document_qa/document_qa_engine.py

@@ -207,7 +207,9 @@ class DocumentQAEngine:
         else:
             hash = metadata[0]['hash']
 
-        self.embeddings_dict[hash] = Chroma.from_texts(texts, embedding=self.embedding_function, metadatas=metadata)
+        if hash not in self.embeddings_dict.keys():
+            self.embeddings_dict[hash] = Chroma.from_texts(texts, embedding=self.embedding_function, metadatas=metadata, collection_name=hash)
+
         self.embeddings_root_path = None
 
         return hash

requirements.txt

@@ -15,7 +15,7 @@ watchdog
 dateparser
 
 # LLM
-chromadb==0.3.25
+chromadb==0.4.15
 tiktoken==0.4.0
 openai==0.27.7
 langchain==0.0.314