Promise.All承诺参数

Question

我有两个promises,每个都返回一个字符串数组.我运行它们Promise.all(p1, p2)但我很惊讶它解析的值参数是一个12k字符串的数组(这将是两个promises'返回之一).

const p1 = ModelA.find()
  .then((bandProfiles) => {
    const bandProfilePlayerTags = []
    // [...] Filling this array with strings
    return bandProfilePlayerTags
  })

const p2 = ModelB.find()
  .then((response) => {
    const playerTags = []
    // [...] Filling this array with strings
    return playerTags
  })

Promise.all(p1, p2).then((values) => {
  // Values is an array containing more than 12k strings
})

我期望值是一个长度为2的数组.values[0]将是来自promise 1 values[1]的返回数组,并且是来自promise 2的返回数组.我在这里缺少什么？

Answer 1

尝试在类似的数组中传递p1和p2

const p1 = ModelA.find()
  .then((bandProfiles) => {
    const bandProfilePlayerTags = []
    // [...] Filling this array with strings
    return bandProfilePlayerTags
  })

const p2 = ModelB.find()
  .then((response) => {
    const playerTags = []
    // [...] Filling this array with strings
    return playerTags
  })

Promise.all([p1, p2]).then((values) => {
  // Values is an array containing more than 12k strings
})

Promise.all(迭代); 期望可迭代对象作为参数