在异步函数中等待而不在Node.js / express中等待

Question

我正在建立（或模拟）允许英雄联盟玩家查看并比较自己和其他玩家的统计信息的网站。 但是，我有一个问题，在完成数据检索之前将加载下一页。

我尝试将所有函数放在异步函数中，然后再调用该函数。 我也曾尝试建立Promises，但我一直做错事并使自己感到困惑。

例如，我的两个主要功能是

function getSummonerID(summonerRegion, summonerName) {
  return new Promise((resolve, reject) => {
    var dataSummoner = {};
    api.get(summonerRegion, 'summoner.getBySummonerName', summonerName)
      .then((data) => {
        if (data) {
          dataSummoner.id = data.id;
          dataSummoner.accountId = data.accountId;
          dataSummoner.name = data.name;
          dataSummoner.profileIconId = data.profileIconId;
          dataSummoner.summonerLevel = data.summonerLevel;
          dataSummoner.exists = true;
          dataSummoner.region = summonerRegion;
          console.log("\ngetSummonerID complete and exists\n");
        } else {
          dataSummoner.exists = false;
          console.log("\ngetSummonerID complete and doesnt exist\n");
        }
        resolve(dataSummoner);
      })
      .catch(error => console.log(error));
  })
}

和

function getHighestMastery(summonerRegion, summonerID) {
  var dataMastery = {};
  api.get(summonerRegion, 'championMastery.getAllChampionMasteries', summonerID)
    .then((data) => {
      dataMastery.championId = data[0].championId;
      dataMastery.championLevel = data[0].championLevel;
      dataMastery.championPoints = data[0].championPoints;
      for (var i = 0; i < Object.keys(championJSON.data).length; i++)
        if ((dataMastery.championId) === (championJSON.data[Object.keys(championJSON.data)[i]].id)) {
          dataMastery.championName = championJSON.data[Object.keys(championJSON.data)[i]].name;
          dataMastery.championTitle = championJSON.data[Object.keys(championJSON.data)[i]].title;
        }
    })
    .catch(error => console.log(error));
  console.log("\ngetHighestMastery complete\n");
  return dataMastery;
}

然后我打电话给他们

async function retreiveData(summonerRegion, summonerName) {
  summoner = await getSummonerID(summonerRegion, summonerName);
  summoner.name = summonerName;
  summoner.region = summonerRegion;
  console.log("summoner");
  console.log(summoner);
  if (summoner.exists) {
    mastery = await getHighestMastery(summonerRegion, summoner.id);
    console.log("mastery");
    console.log(mastery);
    matches = await getRecentGames(summonerRegion, summoner.accountId, 10);
    console.log("matches");
    console.log(matches);
    rankedInfo = await getRankedInfo(summonerRegion, summoner.id);
    console.log("rankedInfo");
    console.log(rankedInfo);
    console.log("calls done");
  }
  return "done";
}

然后在这里调用：

router.post('/summoner/submit', function(req, res, next) {
  summoner.region = req.body.summRegion;
  summoner.name = req.body.summName;
  if (summoner.name) {
    title = summoner.name + " on " + summoner.region + " - LOLSTATS.GG";
  }
  var x = retreiveData(summoner.region, summoner.name);
  console.log("x is:");
  console.log(x);
  x.then((testVar) => {
    console.log("test var: " + testVar);
    setTimeout(function() {
      console.log("summoner after 5s");
      console.log(summoner);
      console.log("mastery after 5s");
      console.log(mastery);
      console.log("matches after 5s");
      console.log(matches);
      console.log("rankedInfo after 5s");
      console.log(rankedInfo);
    }, 5000);
    res.redirect('/summoner/lookup');
  })
});

在console.log（summoner）之后，retrieveData中的变量的console.logs都是空的，但是数据在“ 5s之后”部分中，所以我知道我的函数正在工作。 我很困惑和迷路，很抱歉，冗长的帖子。

Answer 1

尝试使getHighestMastery函数异步

async function getHighestMastery(summonerRegion, summonerID)

并等待api.get()调用。

var data = await api.get(summonerRegion, 'championMastery.getAllChampionMasteries', summonerID)

另外，尝试添加

.catch(error => {
    console.log(error));
    reject(error);
}

到getSummonerID函数