langchain.memory.chat_message_histories.postgres.PostgresChatMessageHistory

class langchain.memory.chat_message_histories.postgres.PostgresChatMessageHistory(session_id: str, connection_string: str = 'postgresql://postgres:mypassword@localhost/chat_history', table_name: str = 'message_store')[source]

Chat message history stored in a Postgres database.

Attributes

messages

Retrieve the messages from PostgreSQL

Methods

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

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 PostgreSQL

add_user_message(message)

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

clear()

Clear session memory from PostgreSQL

__init__(session_id: str, connection_string: str = 'postgresql://postgres:mypassword@localhost/chat_history', table_name: str = 'message_store')[source]
add_ai_message(message: str) None

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

Parameters

message – The string contents of an AI message.

add_message(message: BaseMessage) None[source]

Append the message to the record in PostgreSQL

add_user_message(message: str) None

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

Parameters

message – The string contents of a human message.

clear() None[source]

Clear session memory from PostgreSQL

Examples using PostgresChatMessageHistory