Название: Programming Ecto: Build Database Apps in Elixir for Scalability and Performance Автор: Darin Wilson, Eric Meadows-Jonsson
Издательство: Pragmatic Bookshelf
Год: 2019
Страниц: 231
Язык: английский
Формат: pdf (true), epub (true), azw3
Размер: 10.1 MB
Languages may come and go, but the relational database endures. Learn how to use Ecto, the premier database library for Elixir, to connect your Elixir and Phoenix apps to databases. Get a firm handle on Ecto fundamentals with a module-by-module tour of the critical parts of Ecto. Then move on to more advanced topics and advice on best practices with a series of recipes that provide clear, step-by-step instructions on scenarios commonly encountered by app developers. Co-authored by the creator of Ecto, this title provides all the essentials you need to use Ecto effectively.
SQL is powerful—there’s a reason it’s stuck around as long as it has—but generating it manually is tedious and error-prone. Developers have addressed this problem by creating libraries that wrap up the low-level vagaries of talking to a database into an API that’s more harmonious with the language being used. In Java, we had Hibernate. In Python, SQLAlchemy. In Ruby, ActiveRecord and DataMapper. And now in Elixir, we have Ecto. Ecto is a large library, and even with its excellent documentation, it can be hard to know where to start. This book will help you with that. Just as it’s helpful to have a tour guide when visiting a new city, this book will help you find your way through Ecto.
Elixir and Phoenix are taking the application development world by storm, and Ecto, the database library that ships with Phoenix, is going right along with them. There are plenty of examples that show you the basics, but to use Ecto to its full potential, you need to learn the library from the ground up.
This definitive guide starts with a tour of the core features of Ecto - repos, queries, schemas, changesets, transactions - gradually building your knowledge with tasks of ever-increasing complexity. Along the way, you'll be learning by doing - a sample application handles all the boilerplate so you can focus on getting Ecto into your fingers.
Build on that core knowledge with a series of recipes featuring more advanced topics. Change your pooling strategy to maximize your database's efficiency. Use nested associations to handle complex table relationships. Add streams to handle large result sets with ease. Based on questions from Ecto users, these recipes cover the most common situations developers run into.
Whether you're new to Ecto, or already have an app in production, this title will give you a deeper understanding of how Ecto works, and help make your database code cleaner and more efficient.
What You Need:
To follow along with the book, you should have Erlang/OTP 19+ and Elixir 1.4+ installed. The book will guide you through setting up a sample application that integrates Ecto.
Who This Book Is For:
This book is for developers who want to access relational databases from their Elixir applications. This includes applications that use the Phoenix web development framework, but Ecto can work in any Elixir app, whether it uses Phoenix or not. We’re going to assume you have some basic knowledge of Elixir. You should be comfortable with creating and running Elixir applications, as well as the basic components of the language: modules, functions, pattern matching, working with the pipe operator, and so on.
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