Firestore 规则说文档获取功能是错误的

Question

在我的新应用程序中，有一系列项目在 firestore 中有成本。以下是我用来保护这些文件的规则：

rules_version = '2';

service cloud.firestore {
    match /databases/{database}/documents {
        match /projects/{project} {
            function isSignedIn() {
                return request.auth != null;
            }

            function isAdmin() {
                return isSignedIn() && get(/databases/(database)/documents/users/$(request.auth.uid)).data.isAdmin) == true);
            }

            allow read: if isSignedIn();
            allow create, update, delete: if isAdmin();
        }
    }
}

当我尝试部署此规则集时，出现以下错误：

Error: Compilation errors in firestore.rules:
[E] 11:41 - Missing 'match' keyword before path.
[E] 11:51 - Forward slash '/' found where identifier or binding expected.    
[E] 11:52 - mismatched input '(' expecting {'{', '/', PATH_SEGMENT}
[E] 11:62 - Missing 'match' keyword before path.
[E] 11:62 - Unexpected '/documents'.
[E] 11:78 - Forward slash '/' found where identifier or binding expected.    
[E] 11:79 - mismatched input '$' expecting {'{', '/', PATH_SEGMENT}
[E] 11:98 - token recognition error at: '`'
[E] 23:1 - Unexpected '}'.

基本上它不喜欢 get 行。但是我从 firestore 文档中得到了这个 here。有谁知道为什么这可能不起作用？

Answer 1

你有一些小错误：

1. 你有两个不需要)
2. 你忘记了 database
之前的 $

试试这个：

rules_version = '2';

service cloud.firestore {
    match /databases/{database}/documents {
        match /projects/{project} {
            function isSignedIn() {
                return request.auth != null;
            }

            function isAdmin() {
                return isSignedIn() && get(/databases/$(database)/documents/users/$(request.auth.uid)).data.isAdmin == true;
            }

            allow read: if isSignedIn();
            allow create, update, delete: if isAdmin();
        }
    }
}