🦖 nodejs-express-mongodb-webapp

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certificate

📚 1. The first page

• setting up express
• running express
• debugging option 💾

  require('chalk')
  require('morgan')
  require('debug')
  

• serving HTML index.js

📚2. Setting up Tooling

• npm script 💾 "start": "node app.js"
• nodemon 💾 "start": "nodemon app.js"
  • nodemon config in package.json 💾

    "nodemonConfig": {
    "restartable": "rs",
    "delay": 2500,
    "env":{
      "PORT":4000
    }
    

• environmental variables 💾 const PORT = process.env.PORT || 3000

📚3. Templating Engines

• templating engines
• passing data to a page by ejs
• working with a template HTML CSS

📚4. using routing to build multiple pages

• building a web application
• building routes for application
• separating files
• parameter variable 💾

  sessionsRouter.route("/:id").get((req, res) => {
  const id = req.params.id;
  res.render("session", {
    session: sessions[id],
  });
  

📚5. connecting to a database (nosql)

• setting mongodb 💾

  https://cloud.mongodb.com/ => {name: "nodejs-globomantics"}
  npm install mongodb
  const { MongoClient } = require("mongodb");
  

• using mongodb 💾

  const url =
  "mongodb+srv://<user>:<password>@nodejs-globomantics.iymsi.mongodb.net/myFirstDatabase?retryWrites=true&w=majority";
  const dbName = "nodejs-globomantics";
  

• inserting data 💾

  const response = await db.collection('sessions').insertMany(sessions);
  res.json(response);
  

• querying data
  • selecting sessions 💾

  const sessions = await db.collection("sessions").find().toArray();
  res.render("sessions", { sessions });
  

  • selecting one session 💾

  const session = await db.collection("sessions").findOne({ _id: new ObjectID(id) });
  res.render("session", { session });