httpClient-Demo

Setup

This repo consists of two separate "apps", a customer-api backend and the httpClient-demo front end, written in Angular 7. To get started, fork and clone this repo!

Back end

In order to use this as intended, you must have json-server installed globally. To install, run npm i -g json-server from your command line. Once installed, from the customer-api directory, start your server by running json-server --watch database.json. Your server should now be started and accessible at http://127.0.0.1:3000 and you should have access to the following routes:

• GET /customers for getting the customers,
• GET /customers/<id> for getting a single customer by id,
• POST /customers for creating a new customer,
• PUT /customers/<id> for updating a customer by id,
• PATCH /customers/<id> for partially updating a customer by id,
• DELETE /customers/<id> for deleting a customer by id.

You can use _page and _limit query parameters to get paginated data. In the Link header you'll get first, prev, next and last links.

For example:

GET /customers?_page=1 for getting the first page of data, GET /customers?_page=1&_limit=5 for getting the first five customers of the first page of data.

Front end

Navigate to the httpClient-demo directory and run npm install. Once dependencies have been installed, run ng serve -o and the web app should automatically open up for you at localhost:4200

This demo is intended to focus on demonstrating making rest API calls using Angular's built in HttpClientModule.

Exercise

Once familiarized with Angular's httpClient, you have 3 primary goals to complete:

1. Implement the getCustomer(id) method to make an api call to your server to retrieve a single customer, and return an Observable of that customer. You'll need to update the CustomerDetailComponent accordingly to be able to utilize the customer in the Observable that is returned by your service.

2. Implement a method in your customerService that will UPDATE an existing customer in your database. The method should accept two parameters as input: an id of an existing customer in your database, and a customer object with updated values, and should make an http request to update the db. You should also modify the CustomerUpdateComponent with a form that will utilize this service.

3. Implement a method in your customerService that will DELETE an existing customer from your database. The method should accept one parameter as input: an id of an existing customer in your database and should make an http request to delete that customer from the db. You should also modify the CustomerDetailComponent to include a button to delete the customer, and redirect back to the customer list when complete.