I'm making a method for product images,price etc and i got this error

Question

I'm making a method for product images,price and name.I'm beginner and doin this work my final year project please help me to solve this.

 class Singleproduct extends StatelessWidget {
      
      
     
    
      final String? productImage;
      final String? productName;
      final double? productPrice;
      final Function? onTap;
    
      Singleproduct(// this is the error (Use key in widget constructors.)
          {@required this.productImage,
          @required this.productName,
          @required this.productPrice,
          this.onTap});

Answer 1

The error is shown because of this lint rule: https://dart-lang.github.io/linter/lints/use_key_in_widget_constructors.html

DO use key in widget constructors.

It's a good practice to expose the ability to provide a key when creating public widgets.

BAD:

class MyPublicWidget extends StatelessWidget { }

GOOD:

class MyPublicWidget extends StatelessWidget { MyPublicWidget({Key? key}) : super(key: key); }

Also check out this video on what keys are: https://api.flutter.dev/flutter/foundation/Key-class.html