Question

我有一个firstore数据库，其中包含如下所示的集合和文档：

用户->事件->活动->流

我希望每个人都能够读取“事件”集合中的文档，如果“事件”文档具有属性，例如对字符串“ public”的可见性，则该文档是子集合文档（活动+流）

因此，如果“事件”集合上的文档对公众具有可见性，则任何用户都应该能够阅读该文档及其子集合。

到目前为止，我设法通过以下方式使事件集中的文档可读：

   service cloud.firestore {
  match /databases/{database}/documents {
    // Make sure the uid of the requesting user matches name of the user
    // document. The wildcard expression {userId} makes the userId variable
    // available in rules.
    match /users/{userID} {
      allow read, update, delete: if request.auth.uid == userID;
      allow create: if request.auth.uid != null;
        match /events/{eventID} {
          allow read: if resource.data.visibility == 'public';
          allow read, write, create, update, delete: if request.auth.uid == userID;
          match /activities/{activitytID} {
            allow read, write, create, update, delete: if request.auth.uid == userID;
            match /streams/{streamID} {
              allow read, write, create, update, delete: if request.auth.uid == userID;
            }
          }
        }

    }
  }
}

当一个事件文档的可见性公开时，如何使嵌套的活动和流集合也可读？

Answer 1

我通过以下方法解决了这个问题：

添加了获取事件数据的功能

 function eventData() {
            return get(/databases/$(database)/documents/users/$(userID)/events/$(eventID)).data
          }

完整规则：

service cloud.firestore {
  match /databases/{database}/documents {
    // Make sure the uid of the requesting user matches name of the user
    // document. The wildcard expression {userId} makes the userId variable
    // available in rules.
    match /users/{userID} {
      allow read, update, delete: if request.auth.uid == userID;
      allow create: if request.auth.uid != null;
        match /events/{eventID} {
          allow read: if resource.data.visibility == 'public';
          allow read, write, create, update, delete: if request.auth.uid == userID;
          function eventData() {
            return get(/databases/$(database)/documents/users/$(userID)/events/$(eventID)).data
          }
          match /activities/{activityID} {
            allow read: if eventData().visibility == 'public'
            allow read, write, create, update, delete: if request.auth.uid == userID;
            match /streams/{streamID} {
              allow read: if eventData().visibility == 'public'
              allow read, write, create, update, delete: if request.auth.uid == userID;
            }
          }
        }

    }
  }
}

Firestore规则：如何允许基于父属性读取嵌套文档

1 个答案: