发送数据至功能-Flutter Firestore

Question

帮助！您需要将数据发送到 addDataToCart 函数，该函数应包含文档集合。我想使用相同的数据将文档从一个集合添加到另一个。我有一个收藏集门票，我想向该收藏集购物车中添加文档

因此，我尝试将此'$ {doc.data}'发送到 addDataToCart 函数，但这不起作用

Widget buildTicketsItem(BuildContext context, DocumentSnapshot doc,
      TicketsBloc blocTickets, CartBloc blocCart) {
    return Container(
      color: Colors.blueGrey[900],
      child: Slidable(
        delegate: SlidableDrawerDelegate(),
        actionExtentRatio: 0.25,
        child: ListTile(
          leading: CircleAvatar(
            backgroundColor: Colors.white,
            backgroundImage: NetworkImage('${doc.data['image']}'),
          ),
          title: Text('${doc.data['name']}'),
          subtitle: Text('${doc.data['description']}'),
          trailing: Text('${doc.data['price']}'),
        ),
        actions: <Widget>[
          IconSlideAction(
            caption: 'Edit',
            color: Colors.blue,
            icon: Icons.edit,
            onTap: () => editDialog(context, blocTickets, doc),
          ),
          IconSlideAction(
            caption: 'Delete',
            color: Colors.red,
            icon: Icons.delete,
            onTap: () => blocTickets.deleteData(doc),
          )
        ],
        secondaryActions: <Widget>[
          IconSlideAction(
            caption: 'Add to Cart',
            color: Colors.green,
            icon: Icons.add,
            onTap: () {
              // validateAndAddDataToCart(blocCart);
              blocCart.addDataToCart('${doc.data}');
            },
          )
        ],
      ),
    );
  }