类型错误。无法对已被撤销的代理执行 "获取"。

Question

我正试图在cron.schedule()中使用上下文。

        this.onTeamsMembersAddedEvent(async (membersAdded, teamInfo, turnContext, next) => {
        const members = await TeamsInfo.getTeamMembers(turnContext);
        const channels = await TeamsInfo.getTeamChannels(turnContext);
        const teamDetails = await TeamsInfo.getTeamDetails(turnContext);
        let msteam = await msTeamsWorkspace.findOne({
            teamName: teamDetails.name,
            teamID: teamDetails.id,
            channelID: channels[0].id
        });

        cron.schedule("* * * * * *", async function(){
            var manager_detail = await Users.findById('5edb94e1182d254d5055775e')
            turnContext.activity.conversation.id = manager_detail.conversationId;
            await turnContext.sendActivity("Hey you got it");
        });

        await next();
    });

错误。

TypeError: Cannot perform 'get' on a proxy that has been revoked
    at Task.execution (K:\Project\MSTeams Bot\src\bot\bot.js:187:29)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)

第187行：turnContext.activity.conversation.id = manager_detail.conversationId。

Answer 1

基本上，发生这种情况是因为 context 只有在你调用 next()，所以一旦消息被发送，机器人使用的代理就不再可用了。这就使得使用回调。setInterval, setTimeout和 cron 使用起来有点麻烦。推荐的途径是使用 积极主动的信息.

关键步骤是： 。

1. 把机器人适配器保存在你可以使用的地方。这个例子是这样做的 此处但它也生活在 turnContext.adapter (见下文)
2. 保存一个 conversationReference 你可以参考。样板这样做 此处
3. 使用 adapter 和 conversationReference 发送一个主动的信息，使用 continueConversation. 该样本是这样做的 此处

具体怎么做取决于你和你的机器人的使用案例。但这里有一个快速的代码示例，以显示它的工作与 cron:

const { ActivityHandler, MessageFactory, TurnContext } = require('botbuilder');
const cron = require('node-cron');

var conversationReferences = {};
var adapter;

class EchoBot extends ActivityHandler {
    constructor() {
        super();
        // See https://aka.ms/about-bot-activity-message to learn more about the message and other activity types.
        this.onMessage(async (context, next) => {
            const replyText = `Echo: ${ context.activity.text }`;
            await context.sendActivity(MessageFactory.text(replyText, replyText));

            const currentUser = context.activity.from.id;
            conversationReferences[currentUser] = TurnContext.getConversationReference(context.activity);
            adapter = context.adapter;

            cron.schedule('* * * * * *', async function() {
                await adapter.continueConversation(conversationReferences[currentUser], async turnContext => {
                    await turnContext.sendActivity('proactive hello');
                });
            });
            // By calling next() you ensure that the next BotHandler is run.
            await next();
        });
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