How to solve DateTime exception when using a Flutter model-CodePudding

I'm receiving data via an API and storing it in a Hive box within my mobile application. An exception is being thrown on a DateTime field.

My raw data from the API response;

{"pointOfServiceNo":"3","pointOfServiceName":"DEANO POS 2","pointOfServiceDescription":"DEANO POS 2","pointOfServiceOrderingGroupNo":"113-1","orders":[{"orderType":"inventory","orderDate":"2022-12-08","deliveryDate":"2022-12-08"}

The exception is;

Exception has occurred. _TypeError (type 'String' is not a subtype of type 'DateTime?')

This is my Model method;

List<Orders> ordersListFromJson(String val) => List<Orders>.from(
json.decode(val)['orders'].map((val) => Orders.ordersInfofromJson(val)));

@HiveType(typeId: 2)
class Orders extends HiveObject {
@HiveField(0)
String? orderType;
@HiveField(1)
DateTime? orderDate;
@HiveField(2)
DateTime? deliveryDate;
@HiveField(3)
List<Articles>? articles;

Orders({this.orderType, this.orderDate, this.deliveryDate, this.articles});

factory Orders.ordersInfofromJson(Map<String, dynamic> orders) => Orders(
  orderType: orders['orderType'],
  orderDate: orders[DateTime.tryParse('orderDate')],
  deliveryDate: orders[DateTime.tryParse('deliveryDate')],
  articles: List<Articles>.from(orders['articles']
      .map((articles) => Articles.articlesfromJson(articles))));
 }

Any feedback on what i'm doing wrong? I'm pretty new to Flutter etc. Any pointers would be greatly appreciated.

CodePudding user response：

You are not accessing the data received in your json for the fields orderDate and deliveryDate. Try this way:

factory Orders.ordersInfofromJson(Map<String, dynamic> orders) => Orders(
orderType: orders['orderType'],
orderDate: DateTime.tryParse(orders['orderDate']),
deliveryDate: DateTime.tryParse(orders['deliveryDate']),
articles: List<Articles>.from(orders['articles']
.map((articles) => Articles.articlesfromJson(articles))));
}