此外，如果您的代码中的集合引用与firebase上的集合名称不匹配，则可能会出现此错误。

例如，firebase上的集合名称是users，但您使用db.collection(" users ")或db.collection("user")引用它。

它也是区分大小写的。

希望这对大家有所帮助

时间限制可能已过

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {

    // This rule allows anyone on the internet to view, edit, and delete
    // all data in your Firestore database. It is useful for getting
    // started, but it is configured to expire after 30 days because it
    // leaves your app open to attackers. At that time, all client
    // requests to your Firestore database will be denied.
    //
    // Make sure to write security rules for your app before that time, or else
    // your app will lose access to your Firestore database
    match /{document=**} {
      allow read, write: if request.time < timestamp.date(2020,7, 1);
    }
  }
}

这一行更改了日期:

 allow read, write: if request.time < timestamp.date(2020,7, 1);

原始代码:

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if request.auth != null;
          
    }
  }
}

修改代码:

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
       allow read: if true;
       allow write: if request.auth != null;
    }
  }
}

https://console.firebase.google.com

开发->数据库->规则->设置读、写-> true

在指定安全规则后，我还出现了“缺少或权限不足”错误。事实证明，默认情况下规则不是递归的!例如，如果你写了一个规则

match /users/{userId} {
  allow read, write: if request.auth != null && request.auth.uid == userId;
}

该规则将不适用于/users/{userId}下的任何子集合。这就是我犯错误的原因。

我通过指定规则来修复它:

match /users/{userId}/{document=**} {
  allow read, write: if request.auth != null && request.auth.uid == userId;
}

在文档的相关部分中阅读更多信息。

也许你该把日期去掉

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if
          request.time < timestamp.date(2021, 12, 12);
    }
  }
}