[Firestore] random number of records are fetched in bun runtime

[hoya82]

Runtime environment

• Operating System version: Ubuntu 22.04.4 LTS
• Firebase SDK version: 12.2.0
• Firebase Product: Firestore
• Node.js version: Bun v1.1.13
• NPM version: N/A

Note

Not sure this is an issue from the @google-cloud/firestore

This bug will NOT reproduce at NodeJS environment. (Tested v16 and v21)

Bug Description

No error, no warnings; It returns random number of records. Total user record count is about 200.

Source code

import { initializeApp, applicationDefault, cert } from "firebase-admin/app";
import { getFirestore, Timestamp } from "firebase-admin/firestore";
import type { Query } from "firebase-admin/firestore";

const credential = applicationDefault();
const firebaseApp = initializeApp({ credential });
const db = getFirestore(firebaseApp);

let query: Query = db.collection("users");
query = query.orderBy("createdAt", "desc").limit(100);

// [BUG] It returns random number of records
const documentSnapshot = await query.get(); 

This bug will occur without orderBy and limit. It returns the same(=random) result with this.

await db.collection('users').get()

package.json

package.json(partial)

  "type": "module",
  "dependencies": {
    "body-parser": "^1.20.2",
    "cors": "^2.8.5",
    "express": "^4.19.2",
    "firebase-admin": "^12.2.0",
    "morgan": "^1.10.0"
  },
  "devDependencies": {
    "@types/bun": "latest",
    "@types/cors": "^2.8.17",
    "@types/morgan": "^1.9.9"
  },
  "peerDependencies": {
    "typescript": "^5.5.3"
  }

Firestore table schema

export interface UserRecord {
  id: string;
  displayName: string;
  email: string;
  createdAt: Date;
  company: string;
  title: string;
  phone: string;
  interest: string;
  acl: string[];
}

No combined index defined.