Flutter：通过将字符串列表传递给where子句来查询Firebase集合

Question

我试图在Flutter中创建一个查询，该查询返回值流。查询的输入是我循环访问的documentIds的列表。问题是流仅返回列表的第一个值。

下面是我的代码

数据库：

 //Get List of wood product


List<WoodProduct> _woodProductDataFromSnapShot(QuerySnapshot snapshot) {
    return snapshot.documents.map((doc) {
      return WoodProduct(
          uid: doc.documentID,
          productName: doc.data['productName'],
          productBrand: doc.data['productBrand'],
          productType: doc.data['productType'],
          length: doc.data['length'],
          width: doc.data['width'],
          thickness: doc.data['thickness'],
          color: doc.data['color'],
          imageUrl: doc.data['imageUrl']);
    }).toList();
  }

  //Stream data from wood collection reference to its id
 Stream<List<WoodProduct>> woodProductIdList(List<String> uid) {
    var woodProductList;
    for(var id in uid)
      woodProductList = woodCollection
          .where(FieldPath.documentId, isEqualTo: id)
          .snapshots().map(_woodProductDataFromSnapShot);

    return woodProductList;
  }

StreamProvider

这是我调用数据库的地方

class _CartState extends State<Cart> {


@override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        StreamProvider<List<Products>>.value(value: null),
        StreamProvider<List<WoodProduct>>.value(
          value: DatabaseService().woodProductIdList(widget.cartListWood),
        )
      ],
      child: Scaffold(
        appBar: AppBar(
          title: Text(CART_TITLE),
          backgroundColor: Colors.amber[400],
          elevation: 0.0,
        ),
        body: Container(
          child: CartGridForm(woodListItem: widget.cartListWood),
        ),
      ),
    );
  }
}

class CartGridForm extends StatefulWidget {
final List<String> woodListItem;
  CartGridForm({this.woodListItem});

  @override
  _CartGridFormState createState() => _CartGridFormState();
}

class _CartGridFormState extends State<CartGridForm> {
  List<String> woodListItems;
  @override
  void initState() {
    woodListItems = widget.woodListItem;
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    //final paint = Provider.of<List<Products>>(context) ?? [];
    final wood = Provider.of<List<WoodProduct>>(context) ?? [];
    return ListView.builder(
        padding: EdgeInsets.all(8.0),
        itemCount: wood.length,
        itemBuilder: (context, index) {
          print(wood.length);
          return Container(
            alignment: Alignment.center,
            child: selectedProdcuts(context, paint: null, wood: wood[index]),
          );
        });
  }

  Widget selectedProdcuts(BuildContext context,
      {List<Products> paint, WoodProduct wood}) {
    return Container(
      width: 100.0,
      height: 100.0,
      child: Text(wood.productName),
    );
  }
}

我需要找到一种方法来返回列表中的所有值，而不仅仅是第一个。而且，还有没有更好的方法可以遍历where子句的ID列表？