[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[],[],null,["# Module chat_message_history (0.12.0)\n\nVersion latestkeyboard_arrow_down\n\n- [0.12.0 (latest)](/python/docs/reference/langchain-google-alloydb-pg/latest/langchain_google_alloydb_pg.chat_message_history)\n- [0.11.0](/python/docs/reference/langchain-google-alloydb-pg/0.11.0/langchain_google_alloydb_pg.chat_message_history)\n- [0.10.0](/python/docs/reference/langchain-google-alloydb-pg/0.10.0/langchain_google_alloydb_pg.chat_message_history)\n- [0.9.3](/python/docs/reference/langchain-google-alloydb-pg/0.9.3/langchain_google_alloydb_pg.chat_message_history)\n- [0.8.0](/python/docs/reference/langchain-google-alloydb-pg/0.8.0/langchain_google_alloydb_pg.chat_message_history)\n- [0.7.0](/python/docs/reference/langchain-google-alloydb-pg/0.7.0/langchain_google_alloydb_pg.chat_message_history)\n- [0.6.0](/python/docs/reference/langchain-google-alloydb-pg/0.6.0/langchain_google_alloydb_pg.chat_message_history)\n- [0.5.0](/python/docs/reference/langchain-google-alloydb-pg/0.5.0/langchain_google_alloydb_pg.chat_message_history)\n- [0.4.1](/python/docs/reference/langchain-google-alloydb-pg/0.4.1/langchain_google_alloydb_pg.chat_message_history)\n- [0.3.0](/python/docs/reference/langchain-google-alloydb-pg/0.3.0/langchain_google_alloydb_pg.chat_message_history)\n- [0.2.2](/python/docs/reference/langchain-google-alloydb-pg/0.2.2/langchain_google_alloydb_pg.chat_message_history) \nAPI documentation for `chat_message_history` module.\n\nClasses\n-------\n\n### [AlloyDBChatMessageHistory](/python/docs/reference/langchain-google-alloydb-pg/latest/langchain_google_alloydb_pg.chat_message_history.AlloyDBChatMessageHistory)\n\n AlloyDBChatMessageHistory(\n key: object,\n engine: langchain_google_alloydb_pg.engine.AlloyDBEngine,\n history: langchain_google_alloydb_pg.async_chat_message_history.AsyncAlloyDBChatMessageHistory,\n )\n\nChat message history stored in an AlloyDB for PostgreSQL database."]]