When using an Object-Relational Mapper (ORM) such as Entity Framework, a very important feature to keep in mind is this: when an entity is materialized as the result of executing a query, it is stored in an in-memory cache. This is usually referred to as First Level Cache, but Martin Fowler gave it another name: Identity Map. In its definition, he said that the purpose of this pattern is to ensure that each object gets loaded only once, by keeping every loaded object in a map. If you think of it, it is a good thing performance-wise, because there's always a cost in instantiating classes and hydrating them from the records obtained from the data source. This is used internally by ORMs, but we can also make use of it to our benefit.
Entity Framework Core Cookbook - Second Edition
By :
Entity Framework Core Cookbook - Second Edition
By:
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
Free Chapter
Improving Entity Framework in the Real World
Mapping Entities
Validation and Changes
Transactions and Concurrency Control
Querying
Advanced Scenarios
Performance and Scalability
Pitfalls
Index
Customer Reviews