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Entity Framework Code First End to End

Entity Framework Code First End to End. Sergey Barskiy Architect, Tyler Technologies. Level: Introductory to Intermediate. Introduction to EF. Entity Framework in Microsoft’s ORM Tool Has been out since 2008 Code First has been out since 2011. Why Entity Framework Code First. ORM

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Entity Framework Code First End to End

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  1. Entity Framework Code First End to End Sergey Barskiy Architect, Tyler Technologies Level: Introductory to Intermediate

  2. Introduction to EF • Entity Framework in Microsoft’s ORM Tool • Has been out since 2008 • Code First has been out since 2011

  3. Why Entity Framework Code First • ORM • Code / type safety • Rapid application development and prototyping • Supported and developed by Microsoft • Continuous commitment from Microsoft • Open sourced • Testable • Flexible / Conventions and configurations

  4. Approaches • DAL? • Business Layer? • UI?

  5. Separation of Concerns • EF is DAL technology • Isolation from other layers • Patterns • Repository • Data Mapper • Table Data Gateway • Row Data Gateway • Data Mapper

  6. DAL Strategy • Keep Data (Table) Objects clean • Separate data access from DTOs • Create Access Interface • Expose Data Access in a service layer with business objects • Using Mappers to cut down on code

  7. Developing Model • Configuration Options • Configuration classes • Attributes? • Handling Relationships • Relationship Types • Using foreign key columns • Using Complex types • Legacy databases / explicit mappings

  8. Creating Data Access Layer • Repository Pattern • Mediates between the domain and data mapping layers using a collection-like interface for accessing domain objects. • Interface based repository • CQRS • Write vs. Read Repository • Taking dependency on IQueryable?

  9. Working with Views and Stored Procedures • EF is not all-or-nothing answers • Writing classes for materialization • Avoiding SQL injection

  10. Handling Schema Changes • Code First Migrations • Create database • Maintain schema • Command line migrations • Explicit vs. Implicit Migrations • Initializers (for rapid prototyping) • Migrating initializer

  11. Performance • Caching Context • Web environments • CRUD Efficiencies • Update • Delete • Select • Lazy Loading • Beware of multiple queries

  12. Demo Solution • ASP.NET MVC • Layer Separation via Projects

  13. Contact Info • sergey@barskiy.com • www.DotNetSpeak.com

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