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Update MongoDBChatMessageHistory to create an index on SessionId (#5632)

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All the queries to the database are done based on the SessionId
property, this will optimize how Mongo retrieves all messages from a
session

#### Who can review?

Tag maintainers/contributors who might be interested:
@dev2049
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Lucas Rodrigues 2023-06-04 17:39:56 -04:00 committed by GitHub
parent 6c11f94013
commit c112d7334d
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langchain/memory/chat_message_histories/mongodb.py
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@ -47,6 +47,7 @@ class MongoDBChatMessageHistory(BaseChatMessageHistory):
self.db = self.client[database_name]
self.collection = self.db[collection_name]
self.collection.create_index("SessionId")
@property
def messages(self) -> List[BaseMessage]: # type: ignore