Entity Framework Core Cookbook

Entity Framework Core Cookbook - Second Edition

By : Ricardo Peres

Buy this Book

Entity Framework Core Cookbook - Second Edition

By: Ricardo Peres

Buy this Book

Overview of this book

Entity Framework is a highly recommended Object Relation Mapping tool used to build complex systems. In order to survive in this growing market, the knowledge of a framework that helps provide easy access to databases, that is, Entity Framework has become a necessity. This book will provide .NET developers with this knowledge and guide them through working efficiently with data using Entity Framework Core. You will start off by learning how to efficiently use Entity Framework in practical situations. You will gain a deep understanding of mapping properties and find out how to handle validation in Entity Framework. The book will then explain how to work with transactions and stored procedures along with improving Entity Framework using query libraries. Moving on, you will learn to improve complex query scenarios and implement transaction and concurrency control. You will then be taught to improve and develop Entity Framework in complex business scenarios. With the concluding chapter on performance and scalability, this book will get you ready to use Entity Framework proficiently.

Entity Framework Core Cookbook - Second Edition

Credits

About the Author

About the Reviewer

www.PacktPub.com

Preface

Free Chapter

Improving Entity Framework in the Real World

Introduction

Improving Entity Framework by using a code-first approach

Unit testing and mocking

Creating databases from code

Creating mock database connections

Implementing the repository pattern

Implementing the unit of work pattern

Mapping Entities

Introduction

Mapping non-public members

Mapping interfaces

Shadow properties

Creating one-to-one maps

Creating one-to-many maps

Creating many-to-many maps

Creating custom conventions

Using sequence key generators

Using GUIDs as keys

Implementing inheritance – Table per Class hierarchy

Validation and Changes

Introduction

Validating simple properties

Validating the whole entity

Validating groups of entities

Intercepting saving changes

Intercepting property changes

Setting the state of an entity

Improving MVC UI with entity framework validation

Inserting, updating, and deleting entities with stored procedures

Updating the database from model changes

Dumping the SQL script for the database creation

Transactions and Concurrency Control

Introduction

Using explicit transactions

Using transactions in custom SQL operations

Implementing optimistic concurrency in SQL Server

Implementing optimistic concurrency in a database-agnostic way

Querying

Introduction

Executing client-side functions in LINQ queries

Mixing SQL with LINQ queries

Getting entities from the local cache

Creating filtered collections

Creating reusable queries

Querying shadow properties

Implementing the query object pattern

Using dynamic LINQ

Advanced Scenarios

Introduction

Generating entities from the database

Implementing multitenancy

Strongly typed bulk operations

Handling soft deletes

Adding logging

Capturing the audit data

Retrieving entity metadata

Improving MVC applications

Hooking infrastructure services

Using other databases

Performance and Scalability

Introduction

Improving the performance of queries

Testing and profiling queries

Using asynchronous operations

Eager loading

Using the cache

Pitfalls

Introduction

GroupBy executes on the client side

Table per class hierarchy requires nullable columns for derived classes

References not eagerly fetched are lost

Date/time operations are not supported

Paging in SQL Server earlier than 2012

Database null semantics

Migrations and contexts with parameterized constructors

Migrations with contexts in different projects

Accessing the service provider too soon

Setting the maximum string length

Mapping discriminator columns

Composite primary keys

Refreshing entities

Cascading entity deletes

Index

Customer Reviews

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About the Reviewer

Jason De Oliveira works as a CTO for MEGA International (http://www.mega.com), a software company in Paris (France) that provides modeling tools for enterprise architecture, enterprise governance risk, and compliance management. He is an experienced manager and senior solutions architect with a lot of skills in software architecture and enterprise architecture.

He loves sharing his knowledge and experience via his blog, by speaking at conferences, writing technical books, writing articles in the technical press, giving software courses as MCT, and coaching co-workers in his company. He frequently collaborates with Microsoft, and you can quite often find him at the Microsoft Technology Center (MTC) in Paris. Microsoft awarded him in 2011 with an MVP in C# for his numerous contributions to the Microsoft community. Microsoft seeks to recognize the best and brightest from technology communities around the world with the MVP award. These exceptional and highly-respected individuals come from more than 90 countries, serve their local online and offline communities, and have an impact worldwide. Jason is very proud to be one of them. Please feel free to contact him via his blog (http://www.jasondeoliveira.com) if you need any technical assistance or want to discuss technical subjects.

Jason has worked as a reviewer on .NET 4.5 Expert Programming Cookbook, WCF 4.5 Multi-tier Services Development with LINQ to Entities, .NET 4.5 Parallel Extensions Cookbook, and WCF 4.5 Multi-layer Services Development with Entity Framework, Third Edition by Packt. He has also worked as an author on Visual Studio 2013: Concevoir, développer et gérer des projets Web, les gérer avec TFS 2013 by Editions ENI.

Entity Framework Core Cookbook - Second Edition

By : Ricardo Peres

Entity Framework Core Cookbook - Second Edition

By: Ricardo Peres

Overview of this book

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Current Title:

Entity Framework Core Cookbook - Second Edition

About the Reviewer