langchain_community.chat_message_histories.mongodb.MongoDBChatMessageHistory¶

class langchain_community.chat_message_histories.mongodb.MongoDBChatMessageHistory(connection_string: str, session_id: str, database_name: str = 'chat_history', collection_name: str = 'message_store', create_index: bool = True)[source]¶

Deprecated since version 0.0.25: Use langchain_mongodb.MongoDBChatMessageHistory instead.

Chat message history that stores history in MongoDB.

Parameters

  • connection_string (str) – connection string to connect to MongoDB

  • session_id (str) – arbitrary key that is used to store the messages of a single chat session.

  • database_name (str) – name of the database to use

  • collection_name (str) – name of the collection to use

  • create_index (bool) – whether to create an index with name SessionId. Set to False if such an index already exists.

Attributes

messages

Retrieve the messages from MongoDB

Methods

__init__(connection_string, session_id[, ...])

aadd_messages(messages)

Async add a list of messages.

aclear()

Async remove all messages from the store

add_ai_message(message)

Convenience method for adding an AI message string to the store.

add_message(message)

Append the message to the record in MongoDB

add_messages(messages)

Add a list of messages.

add_user_message(message)

Convenience method for adding a human message string to the store.

aget_messages()

Async version of getting messages.

clear()

Clear session memory from MongoDB
__init__(connection_string: str, session_id: str, database_name: str = 'chat_history', collection_name: str = 'message_store', create_index: bool = True)[source]¶
Parameters

  • connection_string (str) –

  • session_id (str) –

  • database_name (str) –

  • collection_name (str) –

  • create_index (bool) –

async aadd_messages(messages: Sequence[BaseMessage]) → None¶

Async add a list of messages.

Parameters

messages (Sequence[BaseMessage]) – A sequence of BaseMessage objects to store.

Return type

None

async aclear() → None¶

Async remove all messages from the store

Return type

None

add_ai_message(message: Union[AIMessage, str]) → None¶

Convenience method for adding an AI message string to the store.

Please note that this is a convenience method. Code should favor the bulk add_messages interface instead to save on round-trips to the underlying persistence layer.

This method may be deprecated in a future release.

Parameters

message (Union[AIMessage, str]) – The AI message to add.

Return type

None

add_message(message: BaseMessage) → None[source]¶

Append the message to the record in MongoDB

Parameters

message (BaseMessage) –

Return type

None

add_messages(messages: Sequence[BaseMessage]) → None¶

Add a list of messages.

Implementations should over-ride this method to handle bulk addition of messages in an efficient manner to avoid unnecessary round-trips to the underlying store.

Parameters

messages (Sequence[BaseMessage]) – A sequence of BaseMessage objects to store.

Return type

None

add_user_message(message: Union[HumanMessage, str]) → None¶

Convenience method for adding a human message string to the store.

Please note that this is a convenience method. Code should favor the bulk add_messages interface instead to save on round-trips to the underlying persistence layer.

This method may be deprecated in a future release.

Parameters

message (Union[HumanMessage, str]) – The human message to add to the store.

Return type

None

async aget_messages() → List[BaseMessage]¶

Async version of getting messages.

Can over-ride this method to provide an efficient async implementation.

In general, fetching messages may involve IO to the underlying persistence layer.

Return type

List[BaseMessage]

clear() → None[source]¶

Clear session memory from MongoDB

Return type

None