Question

i just recently try learn nodejs, i choose adonisjs framework, because i think it's will be easier for me to learn, because on the nutshell have some similarities with laravel, which i used to code with.

but now, i have some problem, i can't solve, i have function like this :

  async getAllPeople() {
    let allPeople = await People.all()
    let myArray = []
    let checkChild = async (people) => {
      let eachPeopleChild = await people.children().fetch()
      if (eachPeopleChild.rows.length > 0) {
        return people
      }
      return false
    }
    allPeople.rows.forEach(async (people) => {
      let res = await checkChild(people)
      if (res !== false) {
        myArray.push(res)
      }
    })
    console.log(myArray)
  }

when i run this function, it's show an empty array [], i know because of nodejs or js actually have asynchronous behavior, it run this : console.log(myArray) first

what i expected is, how to execute, or return myArray after all the looping or other process is done?

-- problem is on the way i loop the array is not on the way i made callback, promise, because i already using async - await which is returning promise and it's behavior. map or forEach does not allow what i expected.. and the solution is clear : for ( item of items )

thank you

Answer 1

实际上我刚刚找到了解决方案，对于那个告诉我的其他地方的人来说，我不能使用forEach而只是使用for (let item of anArray)。这是我现在的代码：

  async getAllPeople() {
    let allPeople = await People.all()
    let myArray = []
    let checkChild = async (people) => {
      let eachPeopleChild = await people.children().fetch()
      if (eachPeopleChild.rows.length > 0) {
        return people
      }
      return false
    }

    for (let people of allPeople.rows) {
      let res = await checkChild(people)
      if (res !== false) {
        myArray.push(res)
      }
    }
    return myArray
  }

每次都在工作.. !!

Return Variable After Running forEach

1 个答案: