lesson-plan.md

Lesson plan

> Focus on having lots of in class exercises.

> DONT teach everything, let the students investigate topics on their own aswell!

> Focus on how to read documentation, google answers and google errors!!

> Teach towards the students being able to solve the homework

Remember to add the code you wrote in the class to the relevant class branch's class work folder. If the branch has not been created just create and push it :) If you dont have access, write to one from the core team. You can see an example below!

To find examples of what teachers have taught before go to the class branches in the classwork folder, Fx class 07

If you find anything that could be improved then please create a pull request! We welcome changes, so please get involved if you have any ideas!!!

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• Database interaction - No ORM!
  • Connecting to mysql using knex
    • Take a look at this file, dont go into too much detail. More this is how it is
    • Environment variables. Check this repo
  • Executing queries
    • Code inspiration, especially focus on the promise part
  • Code inspiration
• API
  • REST
  • CRUD (follow the structure found in the homework template )
    • Router verb GET, POST, DELETE, PUT
      • Especially focus on post with app.use(express.urlencoded({ extended: true })); and app.use(express.json());
  • Code inspiration
• Postman
  • POST, DELETE, PUT requests
• Exercise finish concerts api

Code inspiration

Executing queries

const knex = require("../database");

router.get("/", async (request, response) => {
  try {
    const titles = await knex("meals").select("title");
    console.log(titles);
  } catch (error) {
    throw error;
  }
});

Phonebook database

Create a phonebook database with contacts:

CREATE TABLE `phonebook`.`contacts` (
  `id` INT NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(45) NULL,
  `phonenumber` VARCHAR(45) NULL,
  PRIMARY KEY (`id`));

// import knex
const knex = require("../database");

// Select using knex
try {
  const contacts = await knex("contacts").select("*").where({ id: 1 });
} catch (error) {
  throw error;
}


// insert using knex
const contact = {
  name: "benjamin",
  phonenumber: "12345678"
};

await knex("contacts").insert(contact);

Phonebook api

Create the following api

Url	Verb	Functionality	Example
api/contacts/	GET	Returns all contacts	GET api/contacts/
api/contacts/	POST	Adds a new contact	POST api/contacts/
api/contacts/{id}	GET	Returns contact by id	GET api/contacts/2
api/contacts/{id}	PUT	Updates the contact by id	PUT api/contacts/2
api/contacts/{id}	DELETE	Deletes the contact by id	DELETE contacts/2

Exercises

Concerts api

Lets create an api for concerts

Connecting the database

Create a concerts table in mysql. It should have these columns: title, band, venue, createdDate, performanceDate and price

Using node and the knex lib:

• INSERT three new concerts
• GET all concerts
• DELETE a specific concert

Routing

Create the following routes

Url	Verb	Functionality	Example
api/concerts/	GET	Returns all concerts	GET api/concerts/
api/concerts/	POST	Adds a new concert	POST api/concerts/
api/concerts/{id}	GET	Returns concert by id	GET api/concerts/2
api/concerts/{id}	PUT	Updates the concert by id	PUT api/concerts/2
api/concerts/{id}	DELETE	Deletes the concert by id	DELETE concerts/2

Query parameters

Parameter	Description	Data type	Example
maxPrice	Get concerts that has a price smaller than maxPrice	Number	/concerts?maxPrice=160
title	Get concerts that partially match a title. Metallic will match the concert with the title Metallica in Parken	String	api/concerts?title=metallic
createdAfter	Get concerts that has been created after the date	Date	api/concerts?createdAfter=2019-04-05
band	Get concerts with a specific band	String	api/concerts?band=metallica

Use the api using postman

Using post man insert some concerts, get some concerts using query parameters, delete some concerts and update some concerts