Question

我尝试在创建某些事件时触发多个云函数。它们都写入Firebase数据库的不同位置。但是，如何指定将触发哪些云函数，然后检索将写入数据库的某些数据？

以下是我的代码。

我的JS

const functions = require('firebase-functions');
const admin = require('firebase-admin');

admin.initializeApp();

exports.sendNotification = functions.database.ref('/Lecture_Materials/{MIS}/{Systems_Devt}/{Systems_DevtId}/name')
.onWrite(( change,context) =>{

// Grab the current value of what was written to the Realtime Database.
var eventSnapshot = change.after.val();
var str1 = "Lecture material uploaded: " + eventSnapshot;
console.log(eventSnapshot);

var topic = "Management.Information.System";
var payload = {
    data: {
        name: str1,
    }
};

// Send a message to devices subscribed to the provided topic.
return admin.messaging().sendToTopic(topic, payload)
    .then(function (response) {
        // See the MessagingTopicResponse reference documentation for the
        // contents of response.
        console.log("Successfully sent message:", response);
        return;
    })
    .catch(function (error) {
        console.log("Error sending message:", error);
    });
});

exports.sendNotification1 = functions.database.ref('/Lecture_Materials/{MIS}/{Enterprise_Sys}/{Enterprise_SysId}/name')
.onWrite(( change,context) =>{

// Grab the current value of what was written to the Realtime Database.
var eventSnapshot = change.after.val();
var str1 = "Lecture material uploaded: " + eventSnapshot;
console.log(eventSnapshot);

var topic = "Management.Information.System";
var payload = {
    data: {
        name1: str1,
    }
};

// Send a message to devices subscribed to the provided topic.
return admin.messaging().sendToTopic(topic, payload)
    .then(function (response) {
        // See the MessagingTopicResponse reference documentation for the
        // contents of response.
        console.log("Successfully sent message:", response);
        return;
    })
    .catch(function (error) {
        console.log("Error sending message:", error);
    });
});

我收到的onMessage

public class MyFirebaseMessagingService extends FirebaseMessagingService {
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {

    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) {
        showNotification(remoteMessage.getData().get("name"));
        showNotification1(remoteMessage.getData().get("name1"));
    }

    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {

    }
}

private void showNotification1(String name1) {
    Intent intent = new Intent(this, MainActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
            PendingIntent.FLAG_ONE_SHOT);

    Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
            .setContentTitle("Lecture Notes(Enterprise Systems)")
            .setSmallIcon(R.mipmap.ic_launcher)
            .setContentText(name1)
            .setAutoCancel(true)
            .setSound(defaultSoundUri)
            .setContentIntent(pendingIntent);

    NotificationManager notificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
}

private void showNotification(String name) {
    Intent intent = new Intent(this, MainActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
            PendingIntent.FLAG_ONE_SHOT);

    Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
            .setContentTitle("Lecture Notes(System Dev't)")
            .setSmallIcon(R.mipmap.ic_launcher)
            .setContentText(name)
            .setAutoCancel(true)
            .setSound(defaultSoundUri)
            .setContentIntent(pendingIntent);

    NotificationManager notificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
}
}

可能是什么问题？

Answer 1

您有两个云功能，触发这两条路径：

/Lecture_Materials/{MIS}/{Systems_Devt}/{Systems_DevtId}/name
/Lecture_Materials/{MIS}/{Enterprise_Sys}/{Enterprise_SysId}/name

{}中包含的每个段都定义了一个变量。如果删除变量名称，则两个论文都是/Lecture_Materials/*/*/*/name。这意味着就云功能而言，这些功能在同一路径上触发。

如果要为不同的操作设置每个功能触发器，则需要确保路径是唯一的。一种典型的方法是使用这样的路径：

/Lecture_Materials/Systems_Devt/{MIS}/{Systems_Devt}/{Systems_DevtId}/name
/Lecture_Materials/Enterprise_Sys/{MIS}/{Enterprise_Sys}/{Enterprise_SysId}/name

如果{Systems_Devt}和您当前的路径实际上不是通配符，但意味着是文字字符串，您还可以保留当前路径并删除{}：

/Lecture_Materials/{MIS}/Systems_Devt/{Systems_DevtId}/name
/Lecture_Materials/{MIS}/Enterprise_Sys/{Enterprise_SysId}/name

多个Firebase功能无法正常工作

1 个答案: