如何从文档快照获取Firestore文档ID?

问题描述

QuerySnapshot querySnapshot = await _collectionRef
                                  .limit(1)
                                  .orderBy('date')
                                  .getDocuments();
var list = querySnapshot.documents;

querySnapshot.documents.map((document) {
    print('Document : $document'); // not printing anything.
  });

if(list.length > 0) {
   print('ID : ${list[0].documentID}'); // not working
}

这是我尝试过的确切代码...代码有什么错误?

This is the exact code i tried...What is the mistake in the code?

推荐答案

根据 API文档， DocumentSnapshot 具有 documentId 属性，所以我希望这可以工作:

According to the API documentation, DocumentSnapshot has a documentId property, so I would expect this to work:

querySnapshot.documents[0].documentID

这篇关于如何从文档快照获取Firestore文档ID?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！