EF DDD = true?

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EF DDD true?

• by Jimmy Nilsson

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About Jimmy Nilsson

• Primarily a developer and architect, but also a
  trainer and author
• Blog JimmyNilsson.com/blog/
• Twitter twitter.com/JimmyNilsson
• Author of Applying Domain-Driven Design and
  Patterns and .NET Enterprise Design
• Co-founder and CEO of factor10

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EF 3.5, how to prepare for 4?
?
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-)
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Why TDD?

• TDD isnt about testing...
• ...its about programming!
• To write simpler, clearer and more robust and
  maintainable code!

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Why DDD?

• Accidental complexity is bad
• Programming is understanding
• (Kristen Nygaard)
• DDD OO done right
• Context is king
• Semantics over technology
• ...

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But also with TDD and DDD we most often need to
persist data

• Its just not the main focus...
• Assume that we might use a relational database
• EF?
• EF3.5
• DB-first (generate metadata and classes)
• IPoco
• EF4
• DB-first (generate metadata and classes)
• Model-first (paint metadata, generate DB and
  classes)
• Code-first (generate metadata in runtime,
  generate DB)

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Disclaimer

• Not a review! No production experience... No
  analysis...

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Our story can begin...
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Time report
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- Show me the code!
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Recommendation

• Frameworks come and go,
• good design lasts! So...
• Focus on DDD and TDD!

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References

• DDD Eric Evans Domain-Driven Design
• ADDDP Jimmy Nilsson Applying Domain-Driven
  Design and Patterns