javascript–从CloudFunctionsforFirebase中的数据库触发器获取用户ID？

在下面的示例中,有没有办法获取写入/ messages / {pushId} / original的用户的uid？

exports.makeUppercase = functions.database.ref('/messages/{pushId}/original')
.onWrite(event => {
// Grab the current value of what was written to the Realtime Database.
const original = event.data.val();
console.log('Uppercasing', event.params.pushId, original);
const uppercase = original.toUpperCase();
// You must return a Promise when performing asynchronous tasks inside a Functions such as
// writing to the Firebase Realtime Database.
// Setting an "uppercase" sibling in the Realtime Database returns a Promise.
return event.data.ref.parent.child('uppercase').set(uppercase);
});


解决方法:

自Firebase功能达到1.0版本以来,此行为不再是未记录的,但已经轻微改变.一定要阅读the docs.

已将上下文添加到云功能中,您可以像这样使用它

exports.dbWrite = functions.database.ref('/path/with/{id}').onWrite((data, context) => {
const authVar = context.auth; // Auth information for the user.
const authType = context.authType; // Permissions level for the user.
const pathId = context.params.id; // The ID in the Path.
const eventId = context.eventId; // A unique event ID.
const timestamp = context.timestamp; // The timestamp at which the event happened.
const eventType = context.eventType; // The type of the event that triggered this function.
const resource = context.resource; // The resource which triggered the event.
// ...
});