初始化

＊Cloud Functions 作法

const { initializeApp } = require('firebase-admin/app');
const { getFirestore } = require('firebase-admin/firestore');

initializeApp();

const db = getFirestore();

＊自架 Server
serviceAccountKey.json：透過 Google Cloud console，選擇服務帳戶－> 點擊新增金鑰－> 類型 JSON

const { initializeApp, applicationDefault, cert } = require('firebase-admin/app');
const { getFirestore } = require('firebase-admin/firestore');

const serviceAccount = require('./path/to/serviceAccountKey.json');

initializeApp({
  credential: cert(serviceAccount)
});

const db = getFirestore();

document 的使用

＊和 Client 端用法大致相同

// set() 指定 document ID
await db.collection('movies').doc(movies-id').set(data);

// add() 使用系統隨機 document ID
await db.collection('movies').add({
  name: 'Sing Street',
  date: '2016'
});

// update() 更新 data 欄位
const movieRef = db.collection('movies').doc(movies-id);
await movieRef.update({date: 2023});

// 取得 collection 所有 document
const moviesRef = db.collection('movies');
const snapshot = await moviesRef.get();
snapshot.forEach(doc => {
  console.log(doc.id, '=>', doc.data());
});

// FieldValue.delete() 刪除 data 特定 field
// 先取得 document 參照
const movieRef = db.collection('movies').doc(movies-id);

// 移除 date
const res = await movieRef.update({
  date: FieldValue.delete()
});

範例 - 儲存電影資料到 Firestore

編輯 Cloud Function index.js 設定 Firebase Admin SDK

// index.js
const functions = require('@google-cloud/functions-framework');
const axios = require("axios");
const cheerio = require("cheerio");
const url = "https://meet.eslite.com/tw/tc/gallery/movieschedule/201803020001";

// 設定 Firebase
const { initializeApp, cert } = require('firebase-admin/app');
const { getFirestore } = require('firebase-admin/firestore');

initializeApp({
  projectId: "xxxxxxx"
});

const db = getFirestore();

functions.http('getTimetable', async(req, res) => {
  try {
    // 略
 
    // 增加 document 到 collection "movies"
    list.forEach(async(item) => {
      const res = await db.collection('movies').add({...item});
    })
    res.status(200).send(list);
  } catch (e) {
    console.log(e)
  }
})

＊Firestore 資料呈現

參考來源

Add data to Cloud Firestore