如何在云功能中从firestore获取用户的电子邮件？

Question

以下是发送欢迎电子邮件的javascript：

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

const userID = firestore.auth().currentUser.getId();
exports.sendWelcomeEmail =
    functions.firestore.document('Users/{userID}').onCreate(async event => {
        const name = event.data.data().name;
        const email = event.data.data().email;



        return sendWelcomeEmail(email, name);
    })

function sendWelcomeEmail(email, name) {
    const mailOptions = {
        from: `${APP_NAME} <jagdish.choudhary@iitgn.ac.in>`,
        to: email,
    };


    mailOptions.subject = `Welcome to ${APP_NAME}!`;
    mailOptions.text = `Hey ${name || ''}! Welcome to ${APP_NAME}. I hope 
you will enjoy our service.`;
    return mailTransport.sendMail(mailOptions).then(() => {
        return console.log('New welcome email sent to:', email);
    });
}

我有像用户一样的firestore数据库＆gt; userID＆gt;姓名，电子邮件。

请帮助我。

Answer 1

正如@ArnavRao所说，你应该像你一样检索数据。它接缝正确，你不需要上面的这一行：const userID = firestore.auth().currentUser.getId();但如果你绝对需要用户ID：

...
const name = event.data.data().name;
const email = event.data.data().email;
const userId = event.params.userID;
...

将为您提供新记录的身份。