如何將 function 添加到 function

Question

我目前有一個 cron 作業 function 每天早上 7:00 發送一條消息，它工作得很好，但現在我希望它從 Trello 卡中獲取消息並且 Trello 部分工作得很好，但是當我把它們放在一起時不起作用。 有任何想法嗎？ 這是我到目前為止所擁有的：

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

您的代碼基本上嘗試這樣做（按此順序）：

• 開始獲取 Trello 卡
• 使用（不存在的）Trello 卡發送嵌入
• 稍后，當 Trello 卡被檢索到時：記錄“找到卡：<卡名>”

這是因為trello.getCardsOnListWithExtraParams是一個異步 function。 您將結果trelloCard作為回調 function 的參數，但是當您將字段添加到嵌入時，您試圖在回調之外訪問它。

把它放在你的 cron function 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)
})