Flutter Firestore：未为 class 'Object?' 定义运算符“[]”。 - 'Object' 来自 'dart:core'

Question

我尝试了很多方法，但一直显示错误：

children: snapshot.data!.docs.map((document) {
                final data = document.data()! as Map<String, dynamic>;
                print(data);
                return ProductCard(
                  title: Text(data["name"]),
                  imageUrl: document.data()['images'][0],
                  price: "$${document.data()['price']}",
                  productId: document.id, onPressed: (){},
                );
              }).toList(),
            );

Answer 1

这是我的错误，正确的解决方案是：

children: snapshot.data!.docs.map((document) {
                final data = document.data()! as Map<String, dynamic>;
                print(data);
                return ProductCard(
                  title: "${data["name"]}",
                  imageUrl: data['images'][0],
                 // price: "$${data['price']}",
                  productId: document.id, onPressed: (){},
                );
              }).toList(),

Flutter Firestore：未为 class 'Object?' 定义运算符“[]”。 - 'Object' 来自 'dart:core'

Flutter Firestore: The operator '[]' isn't defined for the class 'Object?'. - 'Object' is from 'dart:core'

product

flutter

google-cloud-firestore