Stream for 循环不返回每个结果 - Flutter

Question

I'm trying to use a Stream with a loop inside a StreamBuilder , but I'm only getting the first result. I'm using this structure because I need to loop through an array of Items and get only the ones that contain that certain document in Firebase. Could someone please help me figure this out? This is my Stream with the nested loop:

Stream getProductModels(list) {
    var stream;
    for(var i = 0; i < list.length; i++) {
      stream = databaseReference
          .collection('XXXX')
          .where('XXXX', isEqualTo: list[i])
          .snapshots();
    }
    return stream;
  }

Answer 1

Actually you need to merge several stream s into one stream . There is a Flutter SDK for this.

https://pub.dev/packages/rxdart

You can use MergeStream or ZipStream .

Hope this is helpful for you.