replaceAction中的replaceDialog（）

Question

我在我的代码中使用LUIS识别器来触发对话框。在我的一个对话框（'搜索'）中，当用户输入'cancel'时，我想调用'help'对话框。我希望通过cancelAction中的onSelectAction实现这一点。但是我收到一个错误：

(node:42184) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: Dialog[BotBuilder:help] not found.

但是我的代码中有一个“帮助”对话框。这是否发生是因为“帮助”不在对话框堆栈中？任何关于如何调试它的指针都将非常感激。

var builder = require('botbuilder');
var restify = require('restify');

// Setup Restify Server
var server = restify.createServer();
server.listen(process.env.port || process.env.PORT || 3978, function () {
    console.log('%s listening to %s', server.name, server.url);
});
// Create connector and listen for messages
var connector = new builder.ChatConnector({
    appId: process.env.MICROSOFT_APP_ID,
    appPassword: process.env.MICROSOFT_APP_PASSWORD
});
server.post('/api/messages', connector.listen());

var bot = new builder.UniversalBot(connector, function (session) {
    session.replaceDialog('search');
});

bot.dialog('help', [
    function (session, args, next) {
        session.send('Help dialog');
    }
]);

bot.dialog('search', [
  function (session, args, next) {
    builder.Prompts.text(session, 'What would you like to search?');
  }
]).cancelAction('cancelAction', 'Ok, cancelling your search', {
  matches: /^cancel$/,
  onSelectAction: (session, args, next) => {
    session.replaceDialog('help', args);
  }
});

Answer 1

根据replaceDialog的评论：

结束当前对话框并开始一个新对话框。在新对话框完成之前，不会恢复父对话框。

根据onSelectAction行动源代码中的评论：

/**
  ...
     * It's important to note that this is not a waterfall and you should call `next()` if you 
     * would like the actions default behavior to run. 
     */
    onSelectAction?: (session: Session, args?: IActionRouteData, next?: Function) => void;

看来我们需要先调用next()，这可以删除botbuilder库，这个动作会将库改为*。

所以，试试以下：

bot.dialog('search', [
  function (session, args, next) {
    builder.Prompts.text(session, 'What would you like to search?');
  }
]).cancelAction('cancelAction', 'Ok, cancelling your search', {
  matches: /^cancel$/,
  onSelectAction: (session, args, next) => {
    next();
    session.replaceDialog('help', args);
  }
});