Book Image

Entity Framework Core Cookbook - Second Edition

By : Ricardo Peres
Book Image

Entity Framework Core Cookbook - Second Edition

By: Ricardo Peres

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.
Table of Contents (15 chapters)
Entity Framework Core Cookbook - Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Using the cache


We already talked about the first level (or session) cache. Basically, all records loaded from an Entity Framework context as the result of a query are added to this cache automatically. So, if we have loaded enough entities, we may have in this cache what we are looking for, without the need to go to the database.

Another kind of cache is sometimes called a second level cache. This kind of cache outlives a data context, meaning different instances of the same context share this cache. What is it good for? Well, it's good for reference data, for example, data that does not change so often. Once this data is loaded into memory, it can be made available to all contexts that need it, no need to query the database again, instantiate all entities, hydrate them, and so on.

We will explore both caches here.

Getting ready

We will be using the NuGet Package Manager to install the Entity Framework Core 1 package, Microsoft.EntityFrameworkCore. We will also be using a SQL Server database...