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An Introduction to Castle ActiveRecord, or Stop Writing CRUD!

Writing CRUD sucks!

Every day, you are challenged to get more done in less time.

You want to focus on real business value and stop being a plumber.

In the end, it’s about having more time to do what’s really important.

What is the Castle Project?

MonoRail ActiveRecord MicroKernel Windsor

What is Castle ActiveRecord?

Castle ActiveRecord is an implementation

• f the ActiveRecord

pattern for .NET implemented using Nhibernate.

The Pattern

“An object that wraps a row in a database table or view, encapsulates the database access, and adds domain logic

• n that data.”

Its purpose is to relieve the developer from a significant amount of relational data persistence-related programming tasks.

What is Nhibernate?

Code Walkthrough – The Old Way

The ActiveRecord Way

• Very little configuration
• Extend from a base class

– ActiveRecordBase<T> – ActiveRecordValidationBase<T>

• Attributes

– [ActiveRecord] – [PrimaryKey] – [Property] – [HasMany] – [BelongsTo]

Code Walkthrough – ActiveRecord

Things to think about

• Text columns
• Lazy Loading
• Web apps require “isWeb=true”
• ActiveWriter

ActiveWriter

• Drag & drop design surface
• 1-way generation

– Partial classes

Lazy Loading

ActiveRecord supports lazy loading BUT You should check this link out http://is.gd/71h

Pros and Cons

• Pros

– Simple, yet powerful – NHibernate behind the scenes and readily available when more power is needed

• Cons

– Not a good fit for complex schemas or for batch

• perations.

Contacting me

• My Blog: http://mjeaton.net
• Email: mjeaton@gmail.com
• Twitter: http://twitter.com/mjeaton

References

• The Castle Project

– http://castleproject.org

• Martin Fowler’s ‘Patterns of Enterprise

Application Architecture’

– http://www.martinfowler.com/eaaCatalog/

• NHibernate

– http://www.hibernate.org