Spring AI MessageChatMemoryAdvisor 会将历史的会话内容，再次记录

在 MessageChatMemoryAdvisor 组件的before方法中，方法如下： `@Override public ChatClientRequest before(ChatClientRequest chatClientRequest, AdvisorChain advisorChain) { String conversationId = getConversationId(chatClientRequest.context(), this.defaultConversationId);

    // 1. Retrieve the chat memory for the current conversation.
    List<Message> memoryMessages = this.chatMemory.get(conversationId);

    // 2. Advise the request messages list.
    List<Message> processedMessages = new ArrayList<>(memoryMessages);
    processedMessages.addAll(chatClientRequest.prompt().getInstructions());

    // 3. Create a new request with the advised messages.
    ChatClientRequest processedChatClientRequest = chatClientRequest.mutate()
        .prompt(chatClientRequest.prompt().mutate().messages(processedMessages).build())
        .build();

    // 4. Add the new user message to the conversation memory.
    UserMessage userMessage = processedChatClientRequest.prompt().getUserMessage();
    this.chatMemory.add(conversationId, userMessage);

    return processedChatClientRequest;
}`

方法入参的ChatClientRequest chatClientRequest中，是本次会话的用户信息。 当执行 List memoryMessages = this.chatMemory.get(conversationId) 后，再次组装ChatClientRequest processedChatClientRequest 如下： // 3. Create a new request with the advised messages. ChatClientRequest processedChatClientRequest = chatClientRequest.mutate() .prompt(chatClientRequest.prompt().mutate().messages(processedMessages).build()) .build(); 该ChatClientRequest 中包含有已经存储过的历史信息，再将 processedChatClientRequest 中的信息存入记忆库中，存在重复的信息。

记录信息如下：

Comment From: eeaters

UserMessage userMessage = processedChatClientRequest.prompt().getUserMessage(); In the code, getUserMessage() returns the last user message and does not save duplicates. I see that your table structure is not the default ChatMemory. You can debug it.

Comment From: chenlinks

UserMessage userMessage = processedChatClientRequest.prompt().getUserMessage(); In the code, getUserMessage() returns the last user message and does not save duplicates. I see that your table structure is not the default ChatMemory. You can debug it.

好的，我测试了一下，确实没有问题。debug 看了一下，发现执行写入时先删除了数据，如下: `@Override public void saveAll(String conversationId, List messages) { Assert.hasText(conversationId, "conversationId cannot be null or empty"); Assert.notNull(messages, "messages cannot be null"); Assert.noNullElements(messages, "messages cannot contain null elements");

    this.transactionTemplate.execute(status -> {
        deleteByConversationId(conversationId);
        this.jdbcTemplate.batchUpdate(this.dialect.getInsertMessageSql(),
                new AddBatchPreparedStatement(conversationId, messages));
        return null;
    });
}`

关键点在于：deleteByConversationId(conversationId);否则还是会存在重复记录。这样做不知道是否合理

Comment From: chenlinks

UserMessage userMessage = processedChatClientRequest.prompt().getUserMessage(); In the code, getUserMessage() returns the last user message and does not save duplicates. I see that your table structure is not the default ChatMemory. You can debug it.

也就是说，这个会话记忆里面，始终记录的是最后一次会话的内容。 谢谢你的回答。