Question

我的Firestore数据库中有一个名为Reports的集合，我已经在其中添加了文档。但是我现在的问题是我想在Reports中添加一个带有SubCollection的文档，任何想法吗？

public CollectionReference Ref = firestore.collection("Reports");
Reports reports = new Reports(date, cash, total, discount, quantity, sum, employee);
Ref.add(reports);

Answer 1

Reports不能是文档，只能是集合。因此，假设您具有如下所示的数据库结构：

Firestore-root
    |
    --- Reports (collection)
          |
          --- reportId (document)
                |
                --- // report details

要在包含其他文档的reportId文档下添加新集合，请使用以下代码行：

FirebaseFirestore rootRef = FirebaseFirestore.getInstance();
CollectionReference ref = rootRef
    .collection("Reports").document(reportId)
    .collection("NewCollection").document(newCollectionId);
ref.add(reports);

您的新结构将如下所示：

Firestore-root
    |
    --- Reports (collection)
          |
          --- reportId (document)
                |
                --- // report details
                |
                --- NewCollection (collection)
                       |
                       --- newCollectionId (document)
                              |
                              ---//  newCollectionId details

FIRESTORE-将subCollection插入文档中

1 个答案: