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')

Bases: BaseChatMessageHistory

Chat message history stored in a Postgres database.

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

Attributes

messages

Retrieve the messages from PostgreSQL

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

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

Clear session memory from PostgreSQL

property messages: List[langchain.schema.messages.BaseMessage]

Retrieve the messages from PostgreSQL

Examples using PostgresChatMessageHistory

• Postgres Chat Message History