这不是记录错误日志的最佳方法，但是您总是可以为promiseAll设置一个数组，并将结果存储到新变量中。

如果你使用graphQL，你需要后处理响应，无论如何，如果它没有找到正确的引用，它将崩溃应用程序，缩小问题所在

const results = await Promise.all([
  this.props.client.query({
    query: GET_SPECIAL_DATES,
  }),
  this.props.client.query({
    query: GET_SPECIAL_DATE_TYPES,
  }),
  this.props.client.query({
    query: GET_ORDER_DATES,
  }),
]).catch(e=>console.log(e,"error"));
const specialDates = results[0].data.specialDates;
const specialDateTypes = results[1].data.specialDateTypes;
const orderDates = results[2].data.orders;

这不是记录错误日志的最佳方法，但是您总是可以为promiseAll设置一个数组，并将结果存储到新变量中。

如果你使用graphQL，你需要后处理响应，无论如何，如果它没有找到正确的引用，它将崩溃应用程序，缩小问题所在

const results = await Promise.all([
  this.props.client.query({
    query: GET_SPECIAL_DATES,
  }),
  this.props.client.query({
    query: GET_SPECIAL_DATE_TYPES,
  }),
  this.props.client.query({
    query: GET_ORDER_DATES,
  }),
]).catch(e=>console.log(e,"error"));
const specialDates = results[0].data.specialDates;
const specialDateTypes = results[1].data.specialDateTypes;
const orderDates = results[2].data.orders;

或者，如果你有这样的情况，当有一个失败时，你并不特别关心已解决的承诺的值，但你仍然希望它们运行，你可以这样做，当它们都成功时，你会正常地解决承诺，当它们中的任何一个失败时，你会拒绝失败的承诺:

function promiseNoReallyAll (promises) {
  return new Promise(
    async (resolve, reject) => {
      const failedPromises = []

      const successfulPromises = await Promise.all(
        promises.map(
          promise => promise.catch(error => {
            failedPromises.push(error)
          })
        )
      )

      if (failedPromises.length) {
        reject(failedPromises)
      } else {
        resolve(successfulPromises)
      }
    }
  )
}

您需要知道如何识别结果中的错误。如果您没有标准的预期错误，我建议您对catch块中的每个错误运行转换，使其在结果中可识别。

try {
  let resArray = await Promise.all(
    state.routes.map(route => route.handler.promiseHandler().catch(e => e))
  );

  // in catch(e => e) you can transform your error to a type or object
  // that makes it easier for you to identify whats an error in resArray
  // e.g. if you expect your err objects to have e.type, you can filter
  // all errors in the array eg
  // let errResponse = resArray.filter(d => d && d.type === '<expected type>')
  // let notNullResponse = resArray.filter(d => d)

  } catch (err) {
    // code related errors
  }

在allsettle的帮助下，我们现在可以读取的状态 每个承诺都是，并单独处理每个错误，而不会丢失任何关键信息

const promises = [
    fetch('/api/first'), // first
    fetch('/api/second') // second
];

最简单的方法是处理错误

const [firstResult, secondResult] = await Promise.allSettled(promises)


 // Process first
 if (firstResult.status === 'rejected') {
   const err = firstResult.reason
   // Here you can handle error
 } else {
   const first = firstResult.value
 }

  // Process second
 if (secondResult.status === 'rejected') {
   const err = secondResult.reason
   // Here you can handle error
 } else {
   const second = secondResult.value
 }

处理错误的好方法

const results = await Promise.allSettled(promises);
const [first, second] = handleResults(results)


function handleResults(results) {
  const errors = results.filter(result => result.status === 'rejected').map(result => result.reason)

  if (errors.length) {
    // Aggregate all errors into one
    throw new AggregateError(errors)
  }

  return results.map(result => result.value)
}

我写了一个npm库来处理这个问题更漂亮。 https://github.com/wenshin/promiseallend

安装

npm i --save promiseallend

2017-02-25新增api，不违背承诺原则

const promiseAllEnd = require('promiseallend');

const promises = [Promise.resolve(1), Promise.reject('error'), Promise.resolve(2)];
const promisesObj = {k1: Promise.resolve(1), k2: Promise.reject('error'), k3: Promise.resolve(2)};

// input promises with array
promiseAllEnd(promises, {
    unhandledRejection(error, index) {
        // error is the original error which is 'error'.
        // index is the index of array, it's a number.
        console.log(error, index);
    }
})
    // will call, data is `[1, undefined, 2]`
    .then(data => console.log(data))
    // won't call
    .catch(error => console.log(error.detail))

// input promises with object
promiseAllEnd(promisesObj, {
    unhandledRejection(error, prop) {
        // error is the original error.
        // key is the property of object.
        console.log(error, prop);
    }
})
    // will call, data is `{k1: 1, k3: 2}`
    .then(data => console.log(data))
    // won't call
    .catch(error => console.log(error.detail))

// the same to `Promise.all`
promiseAllEnd(promises, {requireConfig: true})
    // will call, `error.detail` is 'error', `error.key` is number 1.
    .catch(error => console.log(error.detail))

// requireConfig is Array
promiseAllEnd(promises, {requireConfig: [false, true, false]})
    // won't call
    .then(data => console.log(data))
    // will call, `error.detail` is 'error', `error.key` is number 1.
    .catch(error => console.log(error.detail))

// requireConfig is Array
promiseAllEnd(promises, {requireConfig: [true, false, false]})
    // will call, data is `[1, undefined, 2]`.
    .then(data => console.log(data))
    // won't call
    .catch(error => console.log(error.detail))

————————————————————————————————

旧的坏api，不要使用它!

let promiseAllEnd = require('promiseallend');

// input promises with array
promiseAllEnd([Promise.resolve(1), Promise.reject('error'), Promise.resolve(2)])
    .then(data => console.log(data)) // [1, undefined, 2]
    .catch(error => console.log(error.errorsByKey)) // {1: 'error'}

// input promises with object
promiseAllEnd({k1: Promise.resolve(1), k2: Promise.reject('error'), k3: Promise.resolve(2)})
    .then(data => console.log(data)) // {k1: 1, k3: 2}
    .catch(error => console.log(error.errorsByKey)) // {k2: 'error'}