Question

当我尝试通过功能bt通过FCM将设备发送到设备推送通知时，我通过设备发送通知时，它将仅从实时DB中获得一个值。在这里，第一个值是'sem'

                final String sem = record;
                DatabaseReference anewfeed = ndatabase.push();
                anewfeed.child("sem").setValue(sem);
                anewfeed.child("body").setValue(desc)
                .addOnSuccessListener(new OnSuccessListener<Void>() {
                        @Override
                        public void onSuccess(Void aVoid) {
                            progressDialog.dismiss();
                          //  Toast.makeText(addnotice.this, desc , Toast.LENGTH_LONG).show();
                            Toast.makeText(addnotice.this, "Notice Sended Successfully" , Toast.LENGTH_LONG).show();
                            finish();
                        }
                    })
                    .addOnFailureListener(new OnFailureListener() {
                        @Override
                        public void onFailure(@NonNull Exception e) {
                            progressDialog.dismiss();
                            Toast.makeText(addnotice.this, "Error occurred " , Toast.LENGTH_LONG).show();
                        }
                    });

如果我互换sem和body的序列，那么它将获得body的值，当我手动将数据放入Firebase中时，该功能也可以正常工作。这是我的带有onCreate触发器的功能代码

const functions = require('firebase-functions');
const admin =require('firebase-admin');
admin.initializeApp(functions.config().firebase);
exports.sendNotice=functions.database.ref('/notice/{u_id}').onCreate((change, context) => {
var notice = change.val();
var topic = notice.sem;
var bd=  notice.body;
console.log('sem is:', topic);
console.log('notification is:',bd);
var message = {
  notification: {
    title: ('Notice for '+topic+' sem'),
    body: bd
  },
    topic: topic
  };
admin.messaging().send(message);

  } );

在控制台中显示body：undefine

为什么Google Cloud函数{node.js}从Firebase实时数据库中仅读取一个值？

0 个答案: