为什么我不能在命令处理程序中捕获Discord.js错误?

时间:2020-07-18 16:51:51

标签: javascript node.js discord discord.js riot-games-api

因此,我是Java的新手,正在尝试制作一款不和谐的机器人。这是说明我的问题的一小部分:

    module.exports = {
    name: "match",
    category: "LOL",
    description: "Give Summoner's Data to User",
    run: async (client, message, args) => {
        var username = `${args}`
        var regionID= "na1"

        pyke.summoner.getBySummonerName(username, regionID).then(data => {
            return pyke.spectator.getCurrentGameInfoBySummoner(`${data.id}`, "na1").then(result => {
                try {
                    console.log(result)
                } catch (err) {
                    console.error(`${args} isn't in game!`)
                }
            })
    })
    }
}

应该让我看看是否是错误原因,它将把代码发送到控制台。但是,我得到了UnhandledPromiseRejectionWarning。我的问题是为什么我不能捕获错误并将代码发送到控制台?

这就是我尝试执行的命令

const property1 = result.participants.summonerName
            const BResult = property1
            let FResult =  JSON.stringify(BResult)
            message.channel.send(FResult)

当我尝试时,出现一个错误,表明此人不在游戏中。我知道这是错误的,因为它们在游戏中。

所以我走得更远,尝试代替它。

const property1 = result.participants[summonerName]
            const BResult = property1
            let FResult =  JSON.stringify(BResult)
            message.channel.send(FResult)

我仍然从上一个得到相同的结果。我也尝试做const property1 = result.summonerName,但效果不佳。

1 个答案:

答案 0 :(得分:2)

请尝试将pyke.spectator.getCurrentGameInfoBySummone包装在try/catch中。本示例将try/catchawait关键字一起使用:

module.exports = {
  name: "match",
  category: "LOL",
  description: "Give Summoner's Data to User",
  run: async (client, message, args) => {
    const username = `${args}`;
    const regionID = "na1";

    return pyke.summoner.getBySummonerName(username, regionID).then((data) => {
        try {
            const result = await pyke.spectator.getCurrentGameInfoBySummoner(`${data.id}`, "na1");
            console.log(result);
        } catch (err) {
            console.error(`${args} isn't in game!`);
        }
    });
  },
};

否则,您可以尝试使用Promise catch来解决错误:

module.exports = {
  name: "match",
  category: "LOL",
  description: "Give Summoner's Data to User",
  run: async (client, message, args) => {
    const username = `${args}`;
    const regionID = "na1";

    return pyke.summoner.getBySummonerName(username, regionID).then((data) => {
        return pyke.spectator.getCurrentGameInfoBySummoner(`${data.id}`, "na1")
            .then(result => {
                console.log(result);
            })
            .catch(err => {
                console.error(`${args} isn't in game!`)
            }); 
    });
  },
};

您可以使用JSON.stringify来对对象进行字符串化,还可以使用各种不同的方法,例如destructuring来提取只想返回的特定属性,以及创建/返回新对象的方法:

// extract specific properties from `result`
// This is use ES6 destructuring, but you can use dot notation instead or whatever you prefer
const { property1, property2, property 3 } = result;
// return the stringified object only with the properties you need
const payload = { property1, property2 ,property };
return JSON.stringify(payload)