Book Image

Code-First Development with Entity Framework

By : Sergey Barskiy
Book Image

Code-First Development with Entity Framework

By: Sergey Barskiy

Overview of this book

<p>Entity Framework Code-First enables developers to read and write data in a relational database system using C# or VB.NET. It is Microsoft's answer to demand for an ORM from .NET developers.</p> <p>This book will help you acquire the necessary skills to program your applications using Entity Framework. You will start with database configuration and learn how to write classes that define the database structure. You will see how LINQ can be used with Entity Framework to give you access to stored data. You will then learn how to use Entity Framework to persist information in a Relational Database Management System. You will also see how you can benefit from writing ORM-based .NET code. Finally, you will learn how Entity Framework can help you to solve database deployment problems using migrations.</p>
Table of Contents (15 chapters)
Code-First Development with Entity Framework
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Chapter 7: Database Migrations and Additional Features


Q1. This is correct. You have to run the Enable-Migrations commandlet to easily create all the necessary artifacts to support migrations.

Q2. The answer is false. Some operations, such as setting custom default values, cannot be done with automatic migrations. Neither can we create non-Entity Framework objects, such as stored procedures.

Q3. The answer is false. Entity Framework needs to compare our model, defined by entity classes and context, with the target database to know what structures have changed.

Q4. The answer is C—we need to create an empty migration which signals to Entity Framework that the target structure matches the model.

Q5. This is not correct. We can use the NuGet Package Manager Console window to run commandlets to maintain a local database.

Q6. The answer is false. The DbMigration class exposes many methods, including those that create stored procedures.

Q7. The answer is false. We can use conventions or global configuration methods of DbModelBuilder to achieve this task.

Q8. The answer is false. We can use the Log property of the Database object to log commands run by Entity Framework against the database.

Q9. This is not correct. We can create LINQ queries and use methods of the DbGeometry and DbGeography classes to execute native geospatial queries against the database.