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Meadows-Jonsson Eric - Programming Ecto: build database apps in Elixir for scalability and performance

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Meadows-Jonsson Eric Programming Ecto: build database apps in Elixir for scalability and performance
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Part 1. Ecto fundamentals. Getting started with Repo -- Querying your database -- Connecting your tables to Elixir structs with schemas -- Making changes with changesets -- Making multiple changes with transactions and multi -- Making changes to your database -- Part 2. Ecto applied. Adding Ecto to an Elixir application without Phoenix -- Working with changesets and Phoenix forms -- Testing with sandboxes -- Creating and using custom types -- Inserting and updating with upserts -- Optimizing your application design -- Working with embedded schemas -- Creating polymorphic associations -- Optimizing IEx for Ecto -- Using schemas without tables -- Tuning for performance.;Learn how to use Ecto, the premier database library for Elixir, to connect your Elixir and Phoenix apps to databases. Co-authored by the creator of Ecto, this book provides the essentials you need to use Ecto effectively. Explore the core features--repos, queries, schemas, changesets, transactions-- gradually building your knowledge with tasks of ever-increasing complexity. Build on that core knowledge with a series of recipes featuring more advanced topics. Speed up your test suite by running database tests concurrently. Use nested associations to handle complex table relationships. Add streams to handle large result sets with ease. These recipes cover the most common situations developers run into, based on questions from Ecto users.

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Programming Ecto
Build Database Apps in Elixir for Scalability and Performance
by Darin Wilson, Eric Meadows-Jnsson
Version: P1.0 (April 2019)

Copyright 2019 The Pragmatic Programmers, LLC. This book is licensed to the individual who purchased it. We don't copy-protect it because that would limit your ability to use it for your own purposes. Please don't break this trustyou can use this across all of your devices but please do not share this copy with other members of your team, with friends, or via file sharing services. Thanks.

Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and The Pragmatic Programmers, LLC was aware of a trademark claim, the designations have been printed in initial capital letters or in all capitals. The Pragmatic Starter Kit, The Pragmatic Programmer, Pragmatic Programming, Pragmatic Bookshelf and the linking g device are trademarks of The Pragmatic Programmers, LLC.

Every precaution was taken in the preparation of this book. However, the publisher assumes no responsibility for errors or omissions, or for damages that may result from the use of information (including program listings) contained herein.

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Table of Contents
Copyright 2019, The Pragmatic Bookshelf.
Early praise for Programming Ecto

Lets face it, Ecto is not a small library. I think Darin and Eric did a fantastic job of breaking it all down into understandable pieces, giving a ton of examples along the way. Youll learn how to use Ecto, and perhaps more importantly, how it was meant to be used. And if you think you know it very well already, Im sure youll learn new things too!

Wojtek Mach
Hex Core Team, Consultant at Plataformatec

It does a great job of not only explaining how to use Ecto, but also illuminating the SQL underneath and the design decisions that the Ecto team made when building it. For a new team, this would be a great book to teach with; likewise, for an experienced team, this makes for a good reference book.

Ben Marx
Software Architect, Bleacher Report

This is a useful guide for beginners, but also a great resource for developers that have a medium level of knowledge of Ecto. I learned new tricks reading this book.

Ulisses De Almeida
Elixir Developer, author of Learn Functional Programming with Elixir

For many Elixir projects, Ecto is your most important partner, so its important to learn to use it effectively. Darin and Eric have created a wonderful roadmap to help beginners and experienced developers explore its powerful feature set. Its full of clear examples that will help you quickly master Ectofinish this book and youll be well on your way to creating powerful, scalable, reliable, and maintainable database applications.

Bryan Stearns
Senior Software Engineer and Consultant

An eloquent discussion of the tools Ecto provides for database programming in Elixir: testing with sandboxes, changesets, embedded schemas, polymorphic associations, and much more. This book will be a reference for most engineers working in Elixir and Ecto.

Matt Milton
Software Engineer, Enbala Power Networks

Acknowledgments

As the books authors, were the lucky ones who get to have our names on the front cover. But without the extra effort and support of many other folks, this book would have been a fraction of what it currently is, if it existed at all.

Were deeply grateful to Bruce Tate for originally suggesting the idea to us, and for sharing the wisdom gathered from the many books hes written over the years. Our editor Jackie Carter did an extraordinary job guiding a pair of nervous first-time authors with insight, editorial acumen, and a seemingly endless supply of patience. Jos Valim made himself available at several points in the process to clarify behavior we werent sure of, and help us stay on top of features in upcoming releases.

Wed also like thank the reviewers who gave us much-needed feedback on the book as it was evolving: Olufemi Adeojo, Ulisses De Almeida, Mike Foster, Elias Karakoulakis, Justin Lane, Wojtek Mach, Ben Marx, Sean Miller, Matt Milton, Kim Shrier, and Stefan Turalski. And big thanks to the many beta readers who sent in errata to the Pragmatic Bookshelf websitethis book would have a lot more errors if not for the efforts of these folks.

Darin Wilson

Id like to send thanks and shout-outs to my teammates at Infinite Red, especially the leadership team (Jamon Holmgren, Ken Miller, and Todd Werth) for steering us toward Elixir in the first place. And extra gratitude is to due to my fellow Elixirists: Daniel Berkompas, Zach Berkompas, Ryan Linton, Yulian Glukhenko, Morgan Laco, and Silas Matson. Their pull requests and code reviews have taught me more about Elixir than theyll ever know.

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