RangeError (index): Invalid value: Only valid value is 0: 4 when trying to add to cart-CodePudding

 ElevatedButton(
    style: ElevatedButton.styleFrom(
    shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(10))),
        onPressed: () {
            cubit.addItemToCart(
                id: cubit.getCartModel!.data[index].id);
        },
        child: Text(LocaleKeys.addToCart.tr()),
 )

I'm trying to add item to cart so this RangeError Appears to me if anyone know how to solve it, I'll Aprreciate his Effort

CodePudding user response：

Your range error comes from this line

cubit.getCartModel!.data[index]

It tells you that index is

larger than or equal to the number of elements in your list cubit.getCartModel
or smaller than zero

This is a problem because you can only select list elements in a range from 0...length - 1.

CodePudding user response：

Maybe this list is empty.

cubit.getCartModel!.data

and you are accessing it with

index=4