javascript - 火存储 : Couldn't Serialize object of type 'ArrayUnionTransform'

Question

我正在尝试使用 Firestore 文档示例更新数组中的元素:

https://firebase.google.com/docs/firestore/manage-data/add-data#update_elements_in_an_array

var admin = require('firebase-admin');

var washingtonRef = firestore.collection('cities').doc('DC');

var arrUnion = washingtonRef.update({
  regions: admin.firestore.FieldValue.arrayUnion('greater_virginia')
});

但是，当我这样做时，我收到以下错误:

Error: Update() requires either a single JavaScript object or an 
alternating list of field/value pairs that can be followed by an 
optional precondition. Argument "dataOrField" is not a valid Document. 
Couldn't serialize object of type "ArrayUnionTransform" (found in field 
regions). Firestore doesn't support JavaScript objects with custom 
prototypes (i.e. objects that were created via the "new" operator).

Answer 1

确保您使用正确的 SDK。

这不起作用的原因是因为我对 firestore.collection('cities').doc('DC'); 的引用实际上来自这里:

const Firestore = require('@google-cloud/firestore'); // this is the wrong SDK.

const firestore = new Firestore({
  projectId: 'my-project'
  keyFilename: fbKeyFile
});

正如 README.md 上所述这是错误的:

Applications that use Google's Server SDKs should not be used in end-user environments, such as on phones or on publicly hosted websites. If you are developing a Web or Node.js application that accesses Cloud Firestore on behalf of end users, use the firebase Client SDK.

为了让它工作，我简单地切换了以下内容:

firestore.collection('cities').doc('DC');
// to
FirebaseAdmin.firestore().collection('cities').doc('DC');