如何从文档快照获取Firestore文档ID? [英] How to get firestore document ID from document snapshot?

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

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