Entity Framework Today (May 2012)
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Overview of Entity Framework (4.3) with advanced architecture information at the end. Presented at dotnet-zentral.ch in May 2012 by Julie Lerman
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Entity Framework Today (May 2012)
- 1. Entity Framework Today Julie Lerman The Data Farm jlerman@thedatafarm.com twitter @julielerman Presented at Dotnet-zentral.ch May 2, 2012
- 2. Julie Lerman consultant/mentor Microsoft MVP, INETA Speaker, ASPInsider, MCP, VTdotNET Leader, Pluralsight video author contact jlerman@theDataFarm.com www.thedatafarm.com blog theDataFarm.com/blog twitter @julielerman book web site LearnEntityFramework.com
- 3. Plan A • Entity Framework Overview • “Getting Started” Code • Focus on some features • Non-”DemoWare” Solution
- 4. Object Relational Mapper LINQ to Entities Entity SQL
- 5. Entity Data Model Runtime EDMX EDM (XML) System.Data.Metadata.Edm .EntityType .EdmProperty .AssociationType .EdmType .Facet Code + Code First
- 6. EF4.x EntityFramework.dll Code First DbContext Model-less EF Simpler Access POCOPOCOPOCOPOCO Find, Local, Validation, etc… Entity Framework 4 Visual Studio 2010 EDM Designer “Core” (in .NET 4) (Object Services API (ObjectContext) & EntityClient API)
- 7. EF 5.x EntityFramework.dll Code First DbContext Model-less EF Simpler Access POCOPOCOPOCOPOCO Find, Local, Validation, etc… Entity Framework Visual Studio 11 Core EDM Designer (in .NET 4.5) (Object Services API (ObjectContext) & EntityClient API) New: Enum support, Geo Data, auto query cache etc.
- 9. Getting Started Pick your modeling workflow DB First, Model First, Code First Use DbContext for new projects ObjectContext accessible if you need it Database? Existing or let Code First/Model First create it Database or Model Changes Model Updates & DB Updates (“migrations”) supported Consider architecture *Separate projects for model, context, etc *Repositories, UOW, automated tests, etc.
- 10. Shall we code?
- 11. Feature Demos More on migrations No-tracking queries (performance) Managing disconnected state Data layer validations My favorite small DbContext features T4Scaffolding to gen context & repo
- 12. ARCHITECTURE
- 13. UI Service Layer Bus Layer Repo/UoW LINQ Data Layer EF Database
- 14. Testable Classes System.Data.Entity Fake Object/DbSet Fake Metadata & Fake Context & DataA Object/DbContext Context & Data B Class Class Class Repositories Class Repositories Tests Repositories Repositories Unit of Work UI
- 15. Some “controversies” EF &Repository/Unit of Work Abstracting ORMs
- 16. Resources • MSDN Developer Center: msdn.com/data/ef • EF Team: blogs.msdn.com/adonet • Rowan Miller Blog: romiller.com • Arthur Vickers: blog.oneunicorn.com • Julie Lerman: thedatafarm.com/blog • LearnEntityFramework.com • Pluralsight.com videos • MSDN Magazine Data Points Column – http://JulieL.me/datapointscolumn
- 17. Julie Lerman consultant/mentor Microsoft MVP, INETA Speaker, ASPInsider, MCP, VTdotNET Leader contact jlerman@theDataFarm.com www.thedatafarm.com blog theDataFarm.com/blog twitter @julielerman book web site LearnEntityFramework.com
- 18. Resources • MSDN Developer Center: msdn.com/data/ef • EF Team: blogs.msdn.com/adonet • Rowan Miller Blog: romiller.com • Arthur Vickers: blog.oneunicorn.com • Julie Lerman: thedatafarm.com/blog • LearnEntityFramework.com • Pluralsight.com videos • MSDN Magazine Data Points Column – http://JulieL.me/datapointscolumn
- 19. Julie Lerman consultant/mentor Microsoft MVP, INETA Speaker, ASPInsider, MCP, VTdotNET Leader contact jlerman@theDataFarm.com www.thedatafarm.com blog theDataFarm.com/blog twitter @julielerman book web site LearnEntityFramework.com