"Array.push() does not work properly when Mongoose Populate"

Question

I read another post about this problem but I can't figure out how to apply it to my situation (node ​​js Array.push() not working when using mongoose)

This is my Mongoose async populate function, what I want to do is push a value into a final array containing each comment, which I will do something with later. However, .push() doesn't work, I always get an empty array; from what I've read, this has to do with the for loop being synchronous and not being able to accept asynchronous values, but I'm not sure how to fix it

//空数组将被填充所有分数
const allReviewsRating = []
this.populate("reviews").then(async function (allReviews) {
  for (const review of allReviews.reviews) {
    allReviewsRating.push(review.rating)

  }
  // async.map(review, allReviews.reviews)

})

But even if I do something like this

const allReviewsRating = []
this.populate("reviews").then(async function (allReviews) {
  allReviewsRating.push(`1`)
  for (const review of allReviews.reviews) {
    allReviewsRating.push(review.rating)

  }
  // async.map(review, allReviews.reviews)

})

The final array is empty, which confuses me even more

I want to know what I need to do so that my array is not empty and actually has the values ​​I want

Answer 1

I think you need to check, this.populate() function is not populating reviews, if it is, then the problem may be allReviews.reviews, that is, there are no comments among all comments. All other functions are normal. I tested it on my system.