问题描述
我有多个文档,其中包含不同的工作人员姓名及其详细信息,我没有给汽车分配一个唯一的ID,例如"id_1","id_2"等,而不是自动分配给每个文档.现在我的问题是如何访问这些不同的文档及其特定字段(如工作人员姓名和地址)并使用文本小部件显示它.
I have multiple documents containing different worker name and their details and instead of giving an auto I'd I have assigned a unique id like 'id_1', 'id_2' and so on to each documents. Now my question is how to access these different documents and its particular fields like worker name and address and display it using a text widget.
推荐答案
如果您想一次获取所有文档,则可以使用:
If u want to get all the documents at once then u can use :
StreamBuilder<QuerySnapshot>(
stream: Firestore().collection('Workers').snapshots(),
builder: (context, snapshot) {
if (snapshot.data != null) {
// Here u will get list of document snapshots
final List<DocumentSnapshot> documents = snapshot.data.documents;
// now u can access each document by simply specifying its number
// u can also use list view to display every one of them
return ListView.builder(
itemCount: documents.length,
itemBuilder: (context, int index) => Text(documents[index].data['name']),
);
} else {
// Show loading indicator here
}
},
);
如果您想获取特定的文档详细信息(如果您具有文档ID),则可以使用:
If u want to get particular document details (if u have the document id) then u can use :
Future<DocumentSnapshot> _getDocument(String documentName) async {
return await Firestore().collection('Workers').document(documentName).get();
}
现在您可以通过名称访问字段了,例如
now u can access fields by there name e.g.
documentSnapshot.data['Name']
我希望这个帮助:)
这篇关于如何从flutter中使用Firestore中的唯一文档ID进行查询?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!