如何在函数中添加函数

Question

我目前有一个 cron 作业功能，每天早上 7:00 上午发送一条消息，它运行良好，但现在我希望它从 Trello 卡片获取消息并且 Trello 部分运行良好，但是当我把它们放在一起时，它不起作用。有任何想法吗？这是我目前所拥有的：

var job = new CronJob('01 15 18 * * *', function() {
        let listID = "5ec3fda8a26c384e44f063bb";
trello.getCardsOnListWithExtraParams(listID, "pos:top",
       function (error, trelloCard) {
        console.log('Found card:', trelloCard[0].name);
})
const wyrEmbed = new discord.RichEmbed()
      .setTitle("❓**WOULD YOU RATHER**❓")
      .addField(
        "**THE WOULD YOU RATHER**", "test: " + trelloCard[0].name)
      .setDescription(
        " Top o' the mornin’ to ya! All throughout the night, I’ve been preparing a would you rather question for all of you! I can’t wait to see all of the answers you guys think of! "
      )
      .setTimestamp()
      .setFooter("Munchies Ice Cream", client.user.avatarURL)
      .setThumbnail("https://t4.rbxcdn.com/366f4da2e1924b6e4b0816086b485f05")
      .setColor("7ab7e2"); 
        const wyrthing = client.channels.get("688177088573997066")
  wyrthing.send(wyrEmbed)
    console.log('You will see this message every second')
},
  null,
    true,
    'America/New_York'
);
})

Answer 1

您的代码基本上会尝试执行此操作（按此顺序）：

开始获取 Trello 卡片
使用（不存在的）Trello 卡发送嵌入
稍后，当取回 Trello 卡片时：登录"Found card: <card name>"

这是因为trello.getCardsOnListWithExtraParams是一个异步函数。您得到的结果 trelloCard 作为回调函数的参数，但是当您向嵌入添加字段时，您正试图在回调之外访问它。

将其放入您的 cron 函数中：

let listID = "5ec3fda8a26c384e44f063bb";
trello.getCardsOnListWithExtraParams(listID, "pos:top", function (error, trelloCard) {
  console.log('Found card:', trelloCard[0].name);
  const wyrEmbed = new discord.RichEmbed()
    .setTitle("❓**WOULD YOU RATHER**❓")
    .addField("**THE WOULD YOU RATHER**", "test: " + trelloCard[0].name)
    .setDescription(
      " Top o' the mornin’ to ya! All throughout the night, I’ve been preparing a would you rather question for all of you! I can’t wait to see all of the answers you guys think of! "
    )
    .setTimestamp()
    .setFooter("Munchies Ice Cream", client.user.avatarURL)
    .setThumbnail("https://t4.rbxcdn.com/366f4da2e1924b6e4b0816086b485f05")
    .setColor("7ab7e2"); 
  const wyrthing = client.channels.get("688177088573997066")
  wyrthing.send(wyrEmbed)
})

如何在函数中添加函数

How to add a function to a function

javascript

cron

trello

discord

discord.js