Flutter

Question

我收到以下错误：

════════ Exception caught by widgets library ═══════════════════════════════════════════════════════

The following NoSuchMethodError was thrown building StreamBuilder(dirty, state: _StreamBuilderBaseState>#f469b): Class 'QuerySnapshot' has no instance method 'document'. Receiver: Instance of 'QuerySnapshot' Tried calling: document("+918130343322")

body:
  StreamBuilder(
      stream: Firestore.instance.collection('users').snapshots(),
      builder: (context, snapshot){
        if(!snapshot.hasData) return Text('Loading data.....');
        return
            Center(child: Text(snapshot.data.document(_myMobile)["Name"]),);

_mymobile 是文档 ID。

Answer 1

这段代码returns你是一个列表snapshot.data.documents不是一个文件

如果你想这样做，你需要尝试这样做

final specificDocument = snapshot.data.documents.where((f) {
     return f.documentID == _myMobile;
}).toList();

Flutter - Class 'QuerySnapshot' 没有实例方法 'document'

Flutter - Class 'QuerySnapshot' has no instance method 'document'

snapshot

stream-builder