node.js - 获取用户 ID 后，Firebase 函数 onCreate 方法无法在 Firestore 上运行

Question

我正在尝试获取用户的用户 ID，然后在 Firebase Functions 的 firestore 上运行 onCreate 函数以获取后台通知，但 onCreate 函数没有运行。该函数显示其已执行和完成。

import { https, firestore, logger } from "firebase-functions";
import { initializeApp, messaging, firestore as _firestore } from "firebase-admin";

initializeApp();
const fcm = messaging();
const db = _firestore();

export const friendRequest = https.onCall((data, context) => {
  const userID = context.auth.uid;
  try {
    db.collection("users")
      .doc(userID)
      .collection("tokens")
      .doc("token")
      .get()
      .then((value) => {
        const token = value.data().token;
        firestore
          .document(`users/${userID}/recievedRequests/{request}`)
          .onCreate((snapshot) => {
            const senderName = snapshot.data().name;
            logger.log(
              "New Notification to " + token + " ,by :" + senderName
            );
            const payload = {
              notification: {
                title: "New Friend Request",
                body: `Friend Request from ${senderName}`,
              },
            };
            fcm.sendToDevice(token, payload).then((response) => {
              logger.log("Response" + response.successCount);
            });
          });
      });
  } catch (error) {
    logger.log("Error : " + error);
  }
});

这是好友请求功能，我想在用户收到通知时向他发送通知。我的 firebase 日志显示

Answer 1

您在另一个函数中有 onCreate()，因此与 friendRequest 不同，它不会首先部署到 Cloud Functions。您似乎正在尝试通知已收到请求的用户。您可以尝试以下功能:

export const notifyUser = firestore
  .document(`users/{userId}/recievedRequests/{request}`)
  .onCreate(async (snapshot, context) => {
    const userId = context.params.userId;
    const senderName = snapshot.data().name;

    logger.log("New Notification to " + userId + " ,by :" + senderName);

    const payload = {
      notification: {
        title: "New Friend Request",
        body: `Friend Request from ${senderName}`,
      },
    };

    // Get Token of the User
    const tokenSnap = await db
      .collection("users")
      .doc(userId)
      .collection("tokens")
      .doc("token")
      .get();

    const token = tokenSnap.data()!.token;

    return fcm.sendToDevice(token, payload).then((response) => {
      logger.log("Response" + response.successCount);
      return null;
    });
  });

要首先发送请求，您可以简单地在 users/RECEIVER_ID/friendRequests/ 子集合中添加一个文档，这将触发上述函数，该函数将获取接收者 FCM token 和发送通知。不需要 onCall() 函数。