如何发送遍历来自firestore数据库的数组的电子邮件

Question

我正在尝试从电子商务商店发送用户收据。如何循环发送数据

我已经尝试在动态数据上使用 []。

import * as functions from "firebase-functions";
import * as admin from "firebase-admin";
admin.initializeApp();
const db = admin.firestore();

// Sendgrid Config
import * as sgMail from "@sendgrid/mail";

const API_KEY = functions.config().sendgrid.key;
const TEMPLATE_ID = functions.config().sendgrid.template;
sgMail.setApiKey(API_KEY);

//FUNCTIONS

export const newOrder = functions.firestore
.document("checkout/{checkoutId}/products/{productId}")
.onCreate(async (change, context) => {
// Read booking document
const postSnap = await db
  .collection("checkout/{checkoutId}/products")
  .doc(context.params.productId)
  .get();

const booking = postSnap.data() || {};

//Email
const msg = {
  to: "wilmutsami@gmail.com",
  from: "test@example.com",
  templateId: TEMPLATE_ID,
  dynamic_template_data: {
    subject: "Hey there, thank you for your order!",
    name: booking.name,
    amount: booking.amount
    }
  };

 //Send it
 return sgMail.send(msg);
});

预期结果是一封给用户的电子邮件，显示您订购的商品表

Answer 1

如果你想在checkout/{checkoutId}/products/{productId}获取触发云函数的文档的数据你不需要这样做

await db
  .collection("checkout/{checkoutId}/products")
  .doc(context.params.productId)
  .get();

如doc中所述：

当一个函数被触发时，它会提供数据的快照 与事件相关。您可以使用此快照来读取或写入 到触发事件的文档，或使用 Firebase 管理员 用于访问数据库其他部分的 SDK。

您可以通过snapDocumentSnapshot轻松获取文档字段的值，如下：

export const newOrder = functions.firestore
.document("checkout/{checkoutId}/products/{productId}")
.onCreate(async (snap, context) => {

      const docData = snap.data();
      const name = docData.name;
      const amount = docData.amount;

      // You can then use those values in the rest of your code

    const msg = {
      to: "wilmutsami@gmail.com",
      from: "test@example.com",
      templateId: TEMPLATE_ID,
      dynamic_template_data: {
        subject: "Hey there, thank you for your order!",
        name: name,
        amount: amount
        }
      };

    return sgMail.send(msg);

});