Download e-book for kindle: Entity Framework Core Cookbook by Ricardo Peres

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By Ricardo Peres

Leverage the complete power of Entity Framework with this choice of strong and easy-to-follow recipes Entity Framework is a hugely instructed item Relation Mapping software used to construct advanced structures. which will live on during this becoming industry, the information of a framework that is helping offer quick access to databases, that's, Entity Framework has develop into a need. This e-book will offer .NET builders with this data and advisor them via operating successfully with information utilizing Entity Framework middle. you'll start up through studying tips to successfully use Entity Framework in useful occasions. you are going to achieve a deep knowing of mapping homes and tips on how to deal with validation in Entity Framework. The booklet will then clarify the way to paintings with transactions and saved approaches besides bettering Entity Framework utilizing question libraries. relocating on, you are going to discover ways to enhance advanced question eventualities and enforce transaction and concurrency keep watch over. you'll then learn to enhance and enhance Entity Framework in complicated enterprise situations. With the concluding bankruptcy on functionality and scalability, this ebook gets you prepared to exploit Entity Framework proficiently.

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These three objects, while related in layers, are separate concerns, and therefore need to be separate interfaces. Refactoring We have added IUnitOfWork to our layered approach to database communication, and if we have seen anything over the hours of coding, it is code changes. We change it for many reasons, but the bottom line is that code changes often, and we need to make it easy to change. The layers of abstraction that we have added to this solution with IRepository, IUnitOfWork, and IDbContext, have all given us a point at which the change would be minimally painful, and we can leverage the interfaces in the same way.

If you want to tie this to the HTTP request, rollback on error, or tie multiple data connections together in new and interesting ways, then you will need to code in an explicit implementation such as this one. This basic pattern will help to streamline data access, and resolve the concurrency issues caused by conflicts in the objects that are affected by a transaction. There's more… The unit of work is a concept that is deep at the heart of Entity Framework and adheres, out of the box, to the principles following it.

This refactoring to add abstraction levels is a core tenet of clean, extensible code. Removing the concrete implementation details from related objects, and coding to an interface, forces us to encapsulate behavior and abstract our sections of code. See also In this chapter: • Implementing the repository pattern Chapter 2. Mapping Entities In this chapter, we will cover the following topics: • • • • • • • • • • 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 Introduction Object-relational mappers such as Entity Framework rely on mappings to translate Object-oriented concepts—classes, properties, references, inheritance – to the database world – composed of tables and columns – and vice versa.

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Entity Framework Core Cookbook by Ricardo Peres

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