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[英]Undefined name 'DefaultfirebaseOptions'. Try correcting the name to one that is defined, or defining the name
[英]The method 'data' isn't defined for the type 'Object'. Try correcting the name to the name of an existing method, or defining a method named 'data'
我在显示来自 Firebase 的数据时遇到问题。这是我在 FutureBuilder 中使用的代码。 看起来有关于 data() 的错误,但我不知道是哪一个,有人知道吗?
这就是我得到的:“未为类型‘对象’定义方法‘数据’。尝试将名称更正为现有方法的名称,或定义名为‘数据’的方法。”
if(snapshot.connectionState == ConnectionState.done) {
Map<String, dynamic> documentData = snapshot.data!.data() as Map<String, dynamic>;
return ListView(
children: [
CustomSubtitle(
text: "${documentData['01 - Brand']}"
),
CustomTitle(
text: "${documentData['02 - Name']}",
),
CustomText(
text: "${documentData['04 - Description']}",
)
],
);
}
您正在使用QuerySnapshot
的代码。 对于这样的代码,您的代码可以工作,但考虑到您如何使用您收到的结果数据DocumentSnapshot
。 为此,只需将您的代码更改为:
if(snapshot.connectionState == ConnectionState.done) {
Map<String, dynamic> documentData = snapshot.data as Map<String, dynamic>;
return ListView(
children: [
CustomSubtitle(
text: "${documentData['01 - Brand']}"
),
CustomTitle(
text: "${documentData['02 - Name']}",
),
CustomText(
text: "${documentData['04 - Description']}",
)
],
);
}
如果有人是我的情况,我已经找到了解决方案:
builder: (context, AsyncSnapshot<DocumentSnapshot> snapshot) {
if(snapshot.connectionState == ConnectionState.done) {
DocumentSnapshot<Object?> documentData = snapshot.data!;
return ListView(
children: [
CustomSubtitle(
text: "${documentData['01 - Brand']}"
),
CustomTitle(
text: "${documentData['02 - Name']}",
),
CustomText(
text: "${documentData['04 - Description']}",
)
],
);
}
}
future: collection.doc(documentId).get(),
builder: ((context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
Map<String, dynamic> data =
snapshot.data!.data() as Map<String, dynamic>;
String currency = '${data['currency']}';
return Material(
)
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