Programming Ecto 1st edition by Darin, Eric 1680506935 9781680506938

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ISBN-10 ‏ : ‎ 1680506935 

ISBN-13 ‏ : ‎ 9781680506938 

Author:  Darin Wilson, Eric Meadows Jonsson

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. 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

 

Programming Ecto 1st Table of contents:

Part I. Ecto Fundamentals

1. Getting Started with Repo

Ecto and Elixir

Ecto Modules

How Ecto Is Organized

Setting Up the Sample App

The Repository Pattern

The Repo Module

Putting Our Repo to Work

Customizing Your Repo

Wrapping Up

2. Querying Your Database

Query Basics

Refining Our Results with where

Working with Joins

Composing Queries

Other Ways to Use Queries

Wrapping Up

3. Connecting Your Tables to Elixir Structs with Schemas

Creating Schemas

Writing Queries with Schemas

Inserting and Deleting with Schemas

Adding Associations to Schemas

Working with Associations in Queries

Optimizing Associations with Embedded Schemas

Deleting Records with Associations

Using Schemas to Seed a Database

Wrapping Up

4. Making Changes with Changesets

Introducing Changesets

Casting and Filtering

Validating Your Data

Capturing Errors

Using Changesets Without Schemas

Working with Associations

Wrapping Up

5. Making Multiple Changes with Transactions and Multi

Running Transactions with Functions

Running Transactions with Ecto.Multi

Wrapping Up

6. Making Changes to Your Database

Introducing Migrations

Your First Migration

Running Migrations

Rolling Back Migrations

Adding Indexes

Changing Data and Table Structure Together

Specifying Up and Down Operations

Changing Default Behaviors

Wrapping Up

Part II. Ecto Applied

7. Adding Ecto to an Elixir Application Without Phoenix

Creating a New Project

Adding Ecto’s Dependencies

Creating Your Repo Module

Adding Ecto to the Supervision Tree

Using Multiple Ecto Repos

Starting Your App

Wrapping Up

8. Working with Changesets and Phoenix Forms

Generating a Form for a Single Schema

Displaying Changeset Errors

Creating a Form with an Association

Creating a Form with Multiple Associations

Wrapping Up

9. Testing with Sandboxes

Setting Up an Async Test

Changing the Ownership Mode

Safely Sharing Connections with Allowances

Wrapping Up

10. Creating and Using Custom Types

Building on Top of Ecto’s Types

Adding Custom Types Without the Built-In Types

Wrapping Up

11. Inserting and Updating with Upserts

Performing Upserts Without Schemas

Performing Upserts with Schemas

Wrapping Up

12. Optimizing Your Application Design

Separating the Pure from the Impure

Working with Contexts

Working with Umbrella Applications

Wrapping Up

13. Working with Embedded Schemas

Creating Embedded Schemas

Adding Embeds to Another Schema

Making Changes

Choosing Between Embedded Schemas and Associations

Wrapping Up

14. Creating Polymorphic Associations

Polymorphism in Other Frameworks

 

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