Question

我正在关注Wit AI教程，我遇到了困难的地步。我正在尝试扩展快速启动天气教程，以调用实际的天气API，我没有运气。

这是我修改过的getForecast方法。原文可以在这里找到：https://wit.ai/docs/quickstart

 var weather = require('weather-js');

    const actions = {
  send(request, response) {
    const {sessionId, context, entities} = request;
    const {text, quickreplies} = response;
    console.log('sending...', JSON.stringify(response));
  },
  getForecast({context, entities}) {
    var location = firstEntityValue(entities, 'location');
    weather.find({search: location, degreeType: 'F'}, function(err, result) {
        if(err){
            context.missingLocation = true;
            delete context.forecast;
        }else{
            var temperature = result[0].current.temperature;
            context.forecast = temperature+ ' degrees in '+location; // we should call a weather API here
            delete context.missingLocation;
            fs.writeFile("weather.json",JSON.stringify(result));
        }
        return context;
    });
  },
};

Answer 1

所以你想对天气api进行同步调用，但节点并不鼓励它。获得同步调用的方法是使用Promises。

参考 - https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Promise

以下是知识自己实施天气机器人的链接，你可以看到如何使用承诺

https://github.com/wit-ai/witty-weather/blob/master/src/createEngine.js

Wit AI和异步函数

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