Throughout this tutorial, we’ll be learning how to build an Angular 14 CRUD application with Bootstrap 4 styles to consume a REST Web API, create, read, modify, and search data.
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Introducing our Angular 14 CRUD Application
We will learn how to build an Angular 14 front-end application that fetches data from a REST API of products:
- Each product has id, name, description, availability status.
- Users would be able to create, retrieve, update, and delete products.
- Users can search for products by name.
The REST API Endpoints
We’ll be building a Angular 14 frontend app for a presumed REST API exporting the following REST API endpoints:
- POST /api/products create new product
- GET /api/products retrieve all products
- GET /api/products/:id retrieve a product by
:id
- PUT /api/products/:id update a product by
:id
- DELETE /api/products/:id delete a product by
:id
- DELETE /api/products delete all products
- GET /api/products?name=[keyword] find all products which name contains the passed
keyword
.
All of them can work well with this Angular App.
Angular 14 CRUD App Structure
These are the components of our CRUD app:
- The
App
component is the parent of all other components and contains arouter-outlet
directive where the router will be inserting any matched component. It also contains a navigation bar that contains links to the app routes usingrouterLink
directive.
– ProductListComponent
which displays the list of products.
– ProductUpdateComponent
which displays a form for editing product’s details by :id
.
– ProductCreateComponent
which displays a form for creating a new product.
The components use the ProductService
methods for actually making CRUD operations against the REST API. The service makes use of Angular 14 HttpClient
to send HTTP requests to the REST and process responses.
Step 1 — Creating a New Angular 14 Project
Let’s get started by generating a new Angular 14 project using the CLI. You need to run the following command:
$ ng new Angular14CRUDExample
The CLI will ask you a couple of questions — If Would you like to add Angular routing? Type y for Yes and Which stylesheet format would you like to use? Choose CSS.
Step 2 — Generating Angular 14 CRUD Components and Service
Next, we need to generate a bunch of components and a service using the Angular CLI as follows:
$ ng generate service services/product
$ ng g c components/product-create
$ ng g c components/product-details
$ ng g c components/product-list
We have generated three components product-list
, product-details
, product-create
and a product service that provides the necessary methods for sending HTTP requests to the server.
We also have the following artifacts:
– The src/app/app-routing.module.ts
module will contain routes for each component. This file is automatically generated by Angular CLI when you answered Yes for routing. – The App
component contains the router view and navigation bar.
– The src/app/app.module.ts
module declares our Angular components and import the necessary modules such Angular HttpClient
.
Please continue reading in Angular CRUD Example.
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