Book Image

Mastering Entity Framework Core 2.0

By : Prabhakaran Anbazhagan
Book Image

Mastering Entity Framework Core 2.0

By: Prabhakaran Anbazhagan

Overview of this book

Being able to create and maintain data-oriented applications has become crucial in modern programming. This is why Microsoft came up with Entity Framework so architects can optimize storage requirements while also writing efficient and maintainable application code. This book is a comprehensive guide that will show how to utilize the power of the Entity Framework to build efficient .NET Core applications. It not only teaches all the fundamentals of Entity Framework Core but also demonstrates how to use it practically so you can implement it in your software development. The book is divided into three modules. The first module focuses on building entities and relationships. Here you will also learn about different mapping techniques, which will help you choose the one best suited to your application design. Once you have understood the fundamentals of the Entity Framework, you will move on to learn about validation and querying in the second module. It will also teach you how to execute raw SQL queries and extend the Entity Framework to leverage Query Objects using the Query Object Pattern. The final module of the book focuses on performance optimization and managing the security of your application. You will learn to implement failsafe mechanisms using concurrency tokens. The book also explores row-level security and multitenant databases in detail. By the end of the book, you will be proficient in implementing Entity Framework on your .NET Core applications.
Table of Contents (20 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Dedication
Preface
4
Building Relationships – Understanding Mapping

Timestamp-based concurrency tokens


We have already explored Timestamp-based concurrency tokens in the Introducing concurrency tokens section. We can jump directly into the configuration, consider the same scenario and see how the conflicts were handled using the Timestamp concurrency token.

As we did with the non-timestamp based concurrency token, timestamp-based concurrency tokens could also be configured in the following ways:

  • Data annotations
  • Fluent API

We will see how the configurations were performed using both the approaches in our blogging system, and later we will see them in action.

Configuring timestamp tokens through data annotation

We have already seen how data annotation configuration works. For timestamp-based tokens, we need a property that will have a byte array, and it should be marked using the Timestamp data annotation. This is the only configuration required from our end; EF will take care of the rest:

    public class Post 
    {
      // Code removed for brevity
[Timestamp...