将其转换为list flutter firebase

Question

这是我的数据库映像

import 'dart:convert';
class ReviewcountInfo{
List<String> uid;
ReviewcountInfo({
required this.uid,
})
List<String> toList() {
return
}
factory ReviewcountInfo.fromMap(Map<String, dynamic> map) {
return ReviewcountInfo(
uid: ['uid'] ?? 0,
);}
String toJson() => json.encode(toList());
factory ReviewcountInfo.fromJson(String source) =>
ReviewcountInfo.fromMap(json.decode(source));
}

我想以数组的形式从firebase获取数据，如何获取？

我不知道如何填写"List to List(("，"factory ReviewcountInfo"部分。

class BrandingInfo {
num price;
BrandingInfo({
required this.price,
});
Map<String, dynamic> toMap() {
return {
'price': price,
};
}
factory BrandingInfo.fromMap(Map<String, dynamic> map) {
return BrandingInfo(
price: map['price'] ?? 0,
);
}
String toJson() => json.encode(toMap());
factory BrandingInfo.fromJson(String source) =>
BrandingInfo.fromMap(json.decode(source));
}

这是我的示例代码

我参考上面的代码进行编码。

Answer 1

试试这个型号的

import 'dart:convert';
List<ReviewCount> reviewCountFromJson(String str) => List<ReviewCount>.from(json.decode(str).map((x) => ReviewCount.fromJson(x)));
String reviewCountToJson(List<ReviewCount> data) => json.encode(List<dynamic>.from(data.map((x) => x.toJson())));
class ReviewCount {
ReviewCount({
this.reviewcount,
});
final Reviewcount? reviewcount;
factory ReviewCount.fromJson(Map<String, dynamic> json) => ReviewCount(
reviewcount: json["reviewcount"] == null ? null : Reviewcount.fromJson(json["reviewcount"]),
);
Map<String, dynamic> toJson() => {
"reviewcount": reviewcount == null ? null : reviewcount.toJson(),
};
}
class Reviewcount {
Reviewcount({
this.uid,
});
final List<String>? uid;
factory Reviewcount.fromJson(Map<String, dynamic> json) => Reviewcount(
uid: json["uid"] == null ? null : List<String>.from(json["uid"].map((x) => x)),
);
Map<String, dynamic> toJson() => {
"uid": uid == null ? null : List<dynamic>.from(uid!.map((x) => x)),
};
}

然后从消防仓库获取数据

Future<Reviewcount> getuidList({String? pathDocuid}) async{

final response = await FirebaseFirestore.instance.collection("service").doc(pathDocuid!).get();
final mapItFirst = response.data() as Map<String,dynamic>;

// but first print the data using log so you can see if it 
// gettingdata
log("${mapItFirst['reviewcount']}");
log("${mapItFirst['reviewcount']['uid']}");

return Reviewcount.fromJson(mapItFirst["reviewcount"]);
}

如果不提到我的话，试试这个。