我在firestore函数日志中收到此错误
索引:无法读取在exports.observeMessages.functions.database.ref.onCreate.event (/user_code/index.js.js:23:27)处未定义的属性'uid‘
下面是我的函数代码
exports.observeMessages = functions.database.ref('/user-messages/{uid}/{fromId}/{messageId}')
.onCreate(event => {
var uid = event.params.uid;
var fromUid = event.params.fromId
var messageId = event.params.messageId
// let's log out some messages
console.log('User: ' + uid + 'was just messaged by: ' + fromId);
//firestore - get users fcm token from firestore to send a push messaged
var Ref = db.collection('Users').doc(uid);
var getDoc = Ref.get()
.then(doc => {
if (!doc.exists) {
return console.log('No such document!');
} else {
console.log('Document data:', doc.data());
var userUID = parseFloat(doc.data().uid);
return console.log(userUID);
}
})
.catch(err => {
return console.log('Error getting document', err);
});
发布于 2018-06-03 04:38:58
您可能正在使用Firebase SDK for Cloud Functions的1.0.+版本,但您的代码使用的是旧语法( SDK <1.0的语法)。您可以在package.json
文件中验证云函数的版本。
有关语法的更改,请参阅此文档项:https://firebase.google.com/docs/functions/beta-v1-diff
你应该像下面这样修改你的代码(请看前3行的"Here modify"):
exports.observeMessages = functions.database.ref('/user-messages/{uid}/{fromId}/{messageId}')
.onCreate((snap, context) => {
var uid = context.params.uid; // <- Here modify
var fromUid = context.params.fromId // <- Here modify
var messageId = context.params.messageId // <- Here modify
// let's log out some messages
console.log('User: ' + uid + 'was just messaged by: ' + fromId);
//firestore - get users fcm token from firestore to send a push messaged
var Ref = db.collection('Users').doc(uid);
return Ref.get(). // <- Here modify
.then(doc => {
if (!doc.exists) {
console.log('No such document!'); // <- Here modify
return false; // <- Here modify
} else {
console.log('Document data:', doc.data());
var userUID = parseFloat(doc.data().uid);
console.log(userUID); // <- Here modify
//return a promise like the one returned by the sendToDevice method
//See https://firebase.google.com/docs/reference/admin/node/admin.messaging.Messaging#sendToDevice
}
})
.catch(err => {
console.log('Error getting document', err); // <- Here modify, no need to return anything here
});
请注意,您还应该修改代码的其他部分,而不仅仅是顶部的3行。事实上,你需要在你的云函数中返回一个promise。请再次使用“此处修改”注释查看上面的其他修改。
我亲切地(但强烈地:-)建议您观看来自Firebase团队的以下视频:https://www.youtube.com/watch?v=7IkUgCLr5oA&t=28s和https://www.youtube.com/watch?v=652XeeKNHSk,它们解释了这些关键概念。
https://stackoverflow.com/questions/50657410
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