我為我的 Firestore 數(shù)據(jù)庫設置了以下規(guī)則：rules_version = '2';service cloud.firestore {  match /databases/{database}/documents {    match /collections/{document=**} {        allow read;        allow write: if isAdmin();        }    match /general/{document=**} {        allow read;        allow write: if isAdmin();        }    match /inquiries/{document=**} {        allow write;        allow read: if isAdmin();        }    match /orders/{document=**} {        allow write;        allow read: if isAdmin() || resource.data.userID == request.auth.uid;        }    match /products/{document=**} {        allow read;        allow write: if isAdmin();        }    match /users/{userId} {        allow write, read: if belongsTo(userId);        }    function belongsTo(userId) {        return request.auth.uid == userId        }    function isAdmin() {        return resource.data.admin == true;    }  }}如您所見，每個人都可以閱讀 /products 及其文檔以及子集合。哪個適用于產(chǎn)品，但不知何故無法讀取產(chǎn)品的子集合（每個產(chǎn)品都有一個名為）。collection-colorsFirebaseError：權(quán)限缺失或不足。導致錯誤的代碼：retrieveCollectionColors(name) {    this.db.collectionGroup('collection-colors', ref => ref.where('product', '==', name))      .valueChanges().subscribe( (val: []) => {      this.collectionColors.next(val);    }, error => {      console.log(error);    });}