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Postgres 聊天内存节点(Postgres Chat Memory node)#

使用 Postgres 聊天记忆节点将 Postgres 用作存储聊天记录的内存服务器。

🌐 Use the Postgres Chat Memory node to use Postgres as a memory server for storing chat history.

本页列出了 Postgres Chat Memory 节点支持的操作列表以及更多资源的链接。

🌐 On this page, you'll find a list of operations the Postgres Chat Memory node supports, and links to more resources.

凭证

你可以在这里找到该节点的认证信息。

Parameter resolution in sub-nodes

Sub-nodes behave differently to other nodes when processing multiple items using an expression.

Most nodes, including root nodes, take any number of items as input, process these items, and output the results. You can use expressions to refer to input items, and the node resolves the expression for each item in turn. For example, given an input of five name values, the expression {{ $json.name }} resolves to each name in turn.

In sub-nodes, the expression always resolves to the first item. For example, given an input of five name values, the expression {{ $json.name }} always resolves to the first name.

节点参数(Node parameters)#

  • 会话密钥：输入用于在工作流数据中存储记忆的密钥。
  • 表名：输入用于存储聊天记录的表名。如果表不存在，系统将会创建该表。
  • 上下文窗口长度：输入要考虑的前一次交互的数量以获取上下文。

有关该服务的更多信息，请参阅 LangChain 的 Postgres 聊天消息历史文档。

🌐 Refer to LangChain's Postgres Chat Message History documentation for more information about the service.

View n8n's Advanced AI documentation.

单内存实例(Single memory instance)#

If you add more than one Postgres Chat Memory node to your workflow, all nodes access the same memory instance by default. Be careful when doing destructive actions that override existing memory contents, such as the override all messages operation in the Chat Memory Manager node. If you want more than one memory instance in your workflow, set different session IDs in different memory nodes.