Book Image

.Go Programming Blueprints - Second Edition

By : Mat Ryer
Book Image

.Go Programming Blueprints - Second Edition

By: Mat Ryer

Overview of this book

Go is the language of the Internet age, and the latest version of Go comes with major architectural changes. Implementation of the language, runtime, and libraries has changed significantly. The compiler and runtime are now written entirely in Go. The garbage collector is now concurrent and provides dramatically lower pause times by running in parallel with other Go routines when possible. This book will show you how to leverage all the latest features and much more. This book shows you how to build powerful systems and drops you into real-world situations. You will learn to develop high quality command-line tools that utilize the powerful shell capabilities and perform well using Go's in-built concurrency mechanisms. Scale, performance, and high availability lie at the heart of our projects, and the lessons learned throughout this book will arm you with everything you need to build world-class solutions. You will get a feel for app deployment using Docker and Google App Engine. Each project could form the basis of a start-up, which means they are directly applicable to modern software markets.
Table of Contents (19 chapters)
Go Programming Blueprints Second Edition
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Preface

Entities and data access


To persist data in Google Cloud Datastore, we need a struct to represent each entity. These entity structures will be serialized and deserialized when we save and load data through the datastore API. We can add helper methods to perform the interactions with the data store, which is a nice way to keep such functionality physically close to the entities themselves. For example, we will model an answer with a struct called Answer and add a Create method that in turn calls the appropriate function from the datastore package. This prevents us from bloating our HTTP handlers with lots of data access code and allows us to keep them clean and simple instead.

One of the foundation blocks of our application is the concept of a question. A question can be asked by a user and answered by many. It will have a unique ID so that it is addressable (referable in a URL), and we'll store a timestamp of when it was created.

Create a new file inside answersapp called questions.go and...