Book Image

Rapid Application Development with AWS Amplify

By : Adrian Leung
Book Image

Rapid Application Development with AWS Amplify

By: Adrian Leung

Overview of this book

AWS Amplify is a modern toolkit that includes a command line interface (CLI); libraries for JS, iOS, and Android programming; UI component libraries for frameworks like React, Angular, and Vue.js for web development, and React Native and Flutter for mobile development. You'll begin by learning how to build AWS Amplify solutions with React and React Native with TypeScript from scratch, along with integrating it with existing solutions. This book will show you the fastest way to build a production-ready minimum viable product (MVP) within days instead of years. You'll also discover how to increase development speed without compromising on quality by adopting behavior-driven development (BDD) and Cypress for end-to-end test automation, as well as the Amplify build pipeline (DevOps or CI/CD pipeline) to ensure optimal quality throughout continuous test automation and continuous delivery. As you advance, you'll work with React to determine how to build progressive web apps (PWAs) with Amplify and React Native for cross-platform mobile apps. In addition to this, you'll find out how to set up a custom domain name for your new website and set up the AWS Amplify Admin UI for managing the content of your app effectively. By the end of this AWS book, you'll be able to build a full-stack AWS Amplify solution all by yourself.
Table of Contents (14 chapters)
Section 1: Getting Ready
Section 2: Building a Photo Sharing App
Section 3: Production Readiness

Creating a blog post with Mutation for the ReactJS app

In this section, we will be creating a blog post with Mutation. Mutation is all about asking for specific fields in objects to create and manipulate data in GraphQL. Let's look at how to do this.

First, let's create a simple data model for a blog post. Edit the schema.graphql file in the amplify/backend/api/api-name/ directory by using the following code:

type Post @model @key(fields: ["title"]) {
  id: ID!
  title: String!
  content: String!

The id parameter is a unique identifier that's assigned to each blog post to help us differentiate between them. If we put an exclamation mark (!) next to the type of the parameter, this means it cannot be null; that is, it cannot be empty when it is stored in the database, which is DynamoDB in our case. DynamoDB instances, tables, and connections will be generated automatically in the next step. Both the title and content parameters...