Flutter Firestore QuerySnapshot没有getter'document的实例 [英] Flutter Firestore QuerySnapshot has no instance of getter 'document

问题描述

我正在使用它从Firestore数据库中获取消息列表，但是，这给了我一个错误:

I'm using this to get a list of messages from the firestore database, however, it's giving me an error:

颤振:构建时引发了以下NoSuchMethodError: flutter:类"QuerySnapshot"没有实例获取器"document". 颤动:接收器:'QuerySnapshot'的实例 颤抖:尝试通话:文档

flutter: The following NoSuchMethodError was thrown building: flutter: Class 'QuerySnapshot' has no instance getter 'document'. flutter: Receiver: Instance of 'QuerySnapshot' flutter: Tried calling: document

我正在使用的代码是:

StreamBuilder(
                stream: Firestore.instance
                    .collection('messages')
                    .document(groupId)
                    .collection(groupId)
                    .orderBy('timestamp', descending: true)
                    .snapshots(),
                builder: (BuildContext context, AsyncSnapshot snapshot) {
                  if (!snapshot.hasData) {
                    return Center(
                      child: CircularProgressIndicator(),
                    );
                  } else {
                    listMessage = snapshot.data.documents;
                    return ListView.builder(
                      padding: EdgeInsets.all(10.0),
                      itemBuilder: (context, index) =>
                          buildItem(index, snapshot.data.document[index]),
                      itemCount: snapshot.data.documents.length,
                      reverse: true,
                      controller: scrollController,
                    );
                  }
                },
              ),

我是Firestore的新手，noSQL谁能在这里提供帮助?

I'm new to Firestore and noSQL can anyone help here please?

推荐答案

我遇到了同样的问题.这是一个错字.

I had the same issue. It was a typo.

snapshot.data.document[index]

应为:

snapshot.data.documents[index]

这篇关于Flutter Firestore QuerySnapshot没有getter'document的实例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！