1. Entity Framework Code First End to End
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Entity Framework Code First End to End
Sergey Barskiy
Architect, Tyler Technologies
Level: Introductory to Intermediate
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2. Visual Studio Live! Las Vegas 2013
Introduction to EF
Entity Framework in Microsoft’s ORM Tool
Has been out since 2008
Code First has been out since 2011
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3. Why Entity Framework Code First
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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
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4. Visual Studio Live! Las Vegas 2013
Approaches
DAL?
Business Layer?
UI?
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5. Separation of Concerns
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Separation of Concerns
EF is DAL technology
Isolation from other layers
Patterns
Repository
Data Mapper
Table Data Gateway
Row Data Gateway
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6. Visual Studio Live! Las Vegas 2013
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
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7. Visual Studio Live! Las Vegas 2011
Developing Model
Configuration Options
Configuration classes
Attributes?
Handling Relationships
Relationship Types
Using foreign key columns
Using Complex types
Legacy databases / explicit mappings
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8. Creating Data Access Layer
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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?
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9. Working with Views and Stored Procedures
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Working with Views and Stored Procedures
EF is not all-or-nothing answers
Writing classes for materialization
Avoiding SQL injection
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10. Handling Schema Changes
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Handling Schema Changes
Code First Migrations
Create database
Maintain schema
Command line migrations
Explicit vs. Implicit Migrations
Initializers (for rapid prototyping)
Migrating initializer
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Performance
Caching Context
Web environments
CRUD Efficiencies
Update
Delete
Select
Lazy Loading
Beware of multiple queries
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Demo Solution
ASP.NET MVC
Layer Separation via Projects
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13. Visual Studio Live! Las Vegas 2011
Contact Info
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