Flutter + Firebase : Class 'QuerySnapshot' 没有实例 getter 'documents'
Flutter + Firebase : Class 'QuerySnapshot' has no instance getter 'documents'
我搜索了有相同问题的主题,但没有人解决我的问题。
我有这个云商店:
我创建了这个服务:
import 'package:cloud_firestore/cloud_firestore.dart';
class FireBaseApi {
getData() {
try {
var databse = FirebaseFirestore.instance.collection('mycollection');
return databse;
} catch (e) {
print(e);
return null;
}
}
}
并像这样使用它:
return StreamBuilder(
stream: FireBaseApi().getData().snapshots(),
builder: (context, snapshot) {
if (!snapshot.hasData) {
return Scaffold(
body: Center(
child: SizedBox(
width: 100,
height: 100,
child: CircularProgressIndicator())),
);
} else {
print('length = ${snapshot.data.documents}');
return SafeArea(
child: Scaffold(
body: ListView( children: [Text('Noj Clinic'),
child: GridView.builder(
itemCount: snapshot.data.size, .......etc
)],)
我报错了Class 'QuerySnapshot' has no instance getter 'documents'.
显示如下:
将 documents
更改为 docs
。那应该可以解决它。
所以这个
print('length = ${snapshot.data.documents}');
应该变成:
print('length = ${snapshot.data.docs}');
https://pub.dev/documentation/cloud_firestore/latest/cloud_firestore/QuerySnapshot/docs.html
我搜索了有相同问题的主题,但没有人解决我的问题。
我有这个云商店:
我创建了这个服务:
import 'package:cloud_firestore/cloud_firestore.dart';
class FireBaseApi {
getData() {
try {
var databse = FirebaseFirestore.instance.collection('mycollection');
return databse;
} catch (e) {
print(e);
return null;
}
}
}
并像这样使用它:
return StreamBuilder(
stream: FireBaseApi().getData().snapshots(),
builder: (context, snapshot) {
if (!snapshot.hasData) {
return Scaffold(
body: Center(
child: SizedBox(
width: 100,
height: 100,
child: CircularProgressIndicator())),
);
} else {
print('length = ${snapshot.data.documents}');
return SafeArea(
child: Scaffold(
body: ListView( children: [Text('Noj Clinic'),
child: GridView.builder(
itemCount: snapshot.data.size, .......etc
)],)
我报错了Class 'QuerySnapshot' has no instance getter 'documents'.
显示如下:
将 documents
更改为 docs
。那应该可以解决它。
所以这个
print('length = ${snapshot.data.documents}');
应该变成:
print('length = ${snapshot.data.docs}');
https://pub.dev/documentation/cloud_firestore/latest/cloud_firestore/QuerySnapshot/docs.html