CPNT 262 Day 20 - Introduction to Mongoose and Heroku with Atlas

Housekeeping

• Proposed assignment changes
  1. Assignment 6 removed
  2. Assignment 5 upgraded to include Mongoose
     • Weight: 20%
     • Due: Wednesday Nov 10
  3. Group project now 40% (15% for individual contribution)
• Tony needs your team names
• Ash will be covering for Tony this afternoon

Trophy of the Day

• Have ONE member submit a group charter as a Daily

1. express.Router

Materials

• ExpressJS - Routing on Tutorials Point
• Reference: Express Routes - express.Router

Demo: Guild routes with express.Router

• Starter Code

Key Takeaways

Route modules work much like other local modules but require some added steps:

• Inside the route module file (./routes/api.js):

  1. express is required as a module.

  2. Your router is defined using the express.Router function:

     const express = require('express')
     const router = express.Router()

     • it's convention to name the app router when within a local module.

  3. Route handlers operate the same, except:

     • the router.get() is used instead of app.get();
     • the path does not include /api because that is assigned in server.js below.

  4. router is exported normally:

     module.exports = router

• In server.js:

  1. The route module is required normally:

     const api = require('./routes/api')

  2. The often missed step: attach your route to a path using middleware (app.use()) and the optional path argument:

     app.use('/api', api)

  3. Move any modules that the new router depends on, such as the guild.js data and the random-item.js module in the Guild example.

2. Introduction to Mongoose

Materials

• Mongoose CRUD (Create, Read, Update, Delete)
• Mongoose Getting Started (kittens!)
• Gist: Read MongoDB data with Mongoose and Express

Demos

• Kittens in Mongoose Getting Started
• If there's time: Guild app with mongoose

Key Takeaways

• MongoDB is a file database engine. It literally stores its data as a folder (i.e. Collection) of json files (i.e. Documents).
• Working with MongoDB is a little messy so we use the mongoose package to:
  • use a simpler syntax;
  • ensure the documents in a collection have the same structure;
  • hide the gritty details like promises and asynchronous things.

3. MongoDB Atlas on Heroku

Materials

• How to host a RESTful Node.js server with MongoDB Atlas database on Heroku

Key Takeaways

• Most of the steps in this tutorial were completed yesterday so you should only have to complete the following to have your Heroku connect to Atlas:
  • Add your connection string to the Config Var section of your App Settings.
• Note: CORS is probably not needed for your app to operate.

Lab Time

• Have ONE member submit a group charter as a Daily
• Assign the key roles and responsibilities for each group member in delivering the Final Project. After each entry write a short summary defining their role and what their responsibilities are in the project.