Entity framework-4.1-code-first

Entity Framework 4.1
“Code First” & DbContext
Omar Qadan
twitter.com/omarq

What Is ORM

ORM’s in .NET World
Some Open Source
SubSonic
Nhibernate
…
Some Commercial
And the majority waiting microsft

Microsoft Answer
LinqToSQL
Entity Framework
Persistence Ignorance ??

EF Approaches
Database First
Model First
Code First

Database First
Existing Database / DBA
Maximum control
Full T4 Template support (Self Tracking etc.)
Not great with large models (50+ tables)
Source Control merging headaches (XML)

Model First
Generate Database / Migrate
Like to “Draw” model / Designer Fan
Less database centric
Full T4 Template support
Source Control merging nightmare (XML)

Code First
Code Oriented / Dumb down DB
No automated migration support (vNext)
No T4 Template support / Self Tracking (yet)
Source Control Branch friendly
Cross EDMX easy
No SP’s, Compiled Queries

Should have been V1
Simplifies
Discoverability
Does not replace
Needed backward compatibility
Wraps ObjectContext
ObjectContext accessible
DbContext
DbSet
ObjectContext
ObjectSet
Entity Client
Conceptual / Mapping / Logical
DbContext & DbSet
Recommended for all approaches
Use ObjectContext only when needed.

Features
Fluent API
COC
DBContext API

Wrapup / Questions

Entity framework-4.1-code-first

by Omar Qadan on May 14, 2011

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Entity framework-4.1-code-first — Presentation Transcript