Firestore 规则拒绝对具有嵌套集合的聊天应用程序的每个请求。我究竟做错了什么？
我目前正在构建一个聊天应用，但遇到了 Firebase 规则的问题。我想限制用户看到他们不参与的对话。但是，当我尝试实施这些规则时，即使检查对话是否存在，访问似乎也会被拒绝。如何正确配置 Firebase 规则，以允许用户仅查看他们所属的对话，而不是数据库中的所有对话？
这是规则集，我试图仅为对话实现。
rules_version = '2';
service cloud.firestore {
match /databases/{database}/documents {
// Allow users to read and write their own participant documents
match /conversation/{conversationId}/participants/{userId} {
allow read, write: if request.auth.uid == userId;
}
// Allow users to read and write messages in a conversation they are a participant of
match /conversation/{conversationId}/messages/{messageId} {
allow read, write: if exists(/databases/$(database)/documents/conversation/$(conversationId)/participants/$(request.auth.uid));
}
// Allow users to read and write their own conversation documents
match /conversation/{conversationId} {
allow read, write: if exists(/databases/$(database)/documents/conversation/$(conversationId)/participants/$(request.auth.uid));
}
}
}
访问已经在“最顶层”被拒绝，这就是这部分：
// Allow users to read and write their own conversation documents
match /conversation/{conversationId} {
allow read, write: if exists(/databases/$(database)/documents/conversation/$(conversationId)/participants/$(request.auth.uid));
}
我认为，这与这些嵌套对话的工作方式有关，但我不知道我必须改变什么。我尝试在 google firebase 文档中阅读有关此内容的内容，但找不到任何与此相关的内容。 如果您有任何想法，如何解决此问题，请告诉我。谢谢！
我已经尝试让它与多个“规则集”一起使用。它总是在exists()函数处失败。
我也尝试过这个，但似乎也不起作用：
rules_version = '2';
service cloud.firestore {
match /databases/{database}/documents {
function isUserInParticipants(conversationId) {
return get(/databases/$(database)/documents/conversations/$(conversationId)/participants/$(request.auth.uid)).data != null;
}
match /conversations/{conversationId} {
allow read, write: if request.auth != null && isUserInParticipants(conversationId);
match /messages/{messageId} {
allow read, write: if request.auth != null && isUserInParticipants(conversationId);
}
}
}
}
这是我在 Vue.js 中使用的查询：
init() {
const storeAuth = useStoreAuth();
conversationCollectionRef = collection(db, 'conversation')
conversationCollectionQuery = query(conversationCollectionRef)
this.getConversations()
},
async getConversations() {
this.coversationsLoaded = false
getConversationSnapshot = onSnapshot(conversationCollectionQuery, (snapshot) => {
console.log('getConversations')
console.log(snapshot)
this.conversations = []
snapshot.forEach((doc) => {
this.getMessagesOfConversation(doc.id)
const conversation = {
id: doc.id,
...doc.data(),
}
this.conversations.push(conversation)
})
})
this.coversationsLoaded = true
},