Firebase 如何在flatter中使用具有字段时间戳的类“flatter pub run build\u runner build”?
我正试图使用cmd flift pub run build_runner build从对象序列化JSON格式,但它始终显示以下消息: 运行JsonSerializableGenerator时出错 无法生成用于计时的fromJson代码。 提供的TypeHelper实例都不支持定义的类型Firebase 如何在flatter中使用具有字段时间戳的类“flatter pub run build\u runner build”?,firebase,flutter,dart,timestamp,Firebase,Flutter,Dart,Timestamp,我正试图使用cmd flift pub run build_runner build从对象序列化JSON格式,但它始终显示以下消息: 运行JsonSerializableGenerator时出错 无法生成用于计时的fromJson代码。 提供的TypeHelper实例都不支持定义的类型 @JsonSerializable(explicitToJson: true) class RequestData { @JsonKey(required: true) String uid; Str
@JsonSerializable(explicitToJson: true)
class RequestData {
@JsonKey(required: true)
String uid;
String phone;
String email;
String description;
/// Tell json_serializable that "owner_name" should be
/// mapped to this property.
@JsonKey(name: 'owner-name')
String ownerName;
@JsonKey(name: 'location-detail')
String locationDetail;
int status;// 0 waiting, 1 accepted, 2 done, 3 DOING , 4 cancel
List<String> imageUrls;
@JsonKey( required: true, name: "time-taking", toJson: _timestampToJson/*,fromJson: _timeStampFromJson*/)
Timestamp timeTaking;
RequestData({this.uid, this.phone, this.email, this.description,
this.ownerName, this.locationDetail, this.status, this.imageUrls,this.timeTaking});
RequestData.none();
}
如何解决此问题?我也有同样的问题,我的临时解决方案是创建一个JsonConverter以转换为DateTime:
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:json_annotation/json_annotation.dart';
class TimestampConvertDatetime implements JsonConverter<DateTime, Timestamp> {
const TimestampConvertDatetime();
@override
DateTime fromJson(Timestamp json) {
return json.toDate();
}
@override
Timestamp toJson(DateTime object) {
return Timestamp.fromDate(object);
}
}
我也有同样的问题,我的临时解决方案是创建一个JsonConverter以转换为DateTime:
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:json_annotation/json_annotation.dart';
class TimestampConvertDatetime implements JsonConverter<DateTime, Timestamp> {
const TimestampConvertDatetime();
@override
DateTime fromJson(Timestamp json) {
return json.toDate();
}
@override
Timestamp toJson(DateTime object) {
return Timestamp.fromDate(object);
}
}
凉的让我们试试这个解决方案。它很有效,谢谢你。酷!让我们试试这个解决方案。它很有效,谢谢