Book Image

Swift Cookbook. - Second Edition

By : Keith Moon, Chris Barker
Book Image

Swift Cookbook. - Second Edition

By: Keith Moon, Chris Barker

Overview of this book

Swift is an exciting, multi-platform, general-purpose programming language, and with this book, you'll explore the features of its latest version, Swift 5.3. The book begins with an introduction to the basic building blocks of Swift 5.3, its syntax, and the functionalities of Swift constructs. You’ll then discover how Swift Playgrounds provide an ideal platform to write, execute, and debug your Swift code. As you advance through the chapters, the book will show you how to bundle variables into tuples or sets, order your data with an array, store key-value pairs with dictionaries, and use property observers. You’ll also get to grips with the decision-making and control structures in Swift, examine advanced features such as generics and operators, and explore functionalities outside of the standard library. Once you’ve learned how to build iOS applications using UIKit, you'll find out how to use Swift for server-side programming, run Swift on Linux, and investigate Vapor. Finally, you'll discover some of the newest features of Swift 5.3 using SwiftUI and Combine to build adaptive and reactive applications, and find out how to use Swift to build and integrate machine learning models along with Apple’s Vision Framework. By the end of this Swift book, you'll have discovered solutions to boost your productivity while developing code using Swift 5.3.
Table of Contents (14 chapters)
12
About Packt

Database persistence with Fluent and Postgres

In our previous project, our task editor would work a treat as long as the server kept running, but one quick re-start and everything we've saved would be lost forever – which is why persistence, particularly with databases, plays a massive part in software development.

In this section, we're going to continue to build on our TaskAPI project, adding persistence so that our data is always protected.

Getting ready

For this section, you'll need to install Docker on your Mac. Follow this link for information on Docker and containerization, along with a link to the installer: https://www.docker.com/products/docker-desktop.

How to do it...

First, we'll need to create our database. Luckily, Vapor can do that for us:

  1. Start by creating a new file under the Migration folder called CreateTasks.swift and copy the following:
struct CreateTask: Migration {
func prepare(on database: Database) -> EventLoopFuture<Void...