Active Records Barcamp Cameroon 2009

Active Record Presentation by Mambe Churchill Nanje CEO, www.afrovisiongroup.com At Barcamp Cameroon 2009

What is Active Record? Active Record is an implementation of Object Relational Mapping where in a database is manipulated by highly linked objects(MODELS) interfacing the database tables and their content e.g instead of SELECT * FROM accounts WHERE user=1 with Active records we do user=new User(1); //sql gets generated for you

Assumed Knowledge To fully understand active record you need to understand the following
Object Oriented Programming(Java, PHP, Python, C#, Ruby)‏
Relational Database Management Systems(MySQL, Oracle, MSSQL Server)‏

HOW IT WORKS Example: car park management system Database of Cars Code without Active Record: connection=new Connection(h,u,p); query='select * from cars where id=1'; rs=connection.statement.execute(query); car=rs.get(0); print(car.brand); //mercedes print(car.owner); //francis Code With Active Record: database=new Database(h,u,p); car=database.get('cars',1); print(car.brand); //mercedes print(car.owner); //francis

CASE STUDY WWW.UBSTUDENTS.COM : 2007
With Active Records I did the following in 7days
manage student accounts
manage student news and comment
manage student pictures and comments
manage student friendship request and social connections
University of Buea Students online portal

CASE STUDY WWW.NAIJABORN.COM : 2009 CASE STUDY
Full data abstraction of user profiles
Full data abstraction of user pictures
Full data abstraction of user posts, art and music
Full data abstraction of user networks,
Full data abstraction of user private messages
Full data abstraction of user comments
Online community of Nigerians and their career info

CASE STUDY WWW.AFRIKEO.COM 2008
Fully functional search engine model
Highly optimised administrative backend models for managing news,blog, classified source data
Easy data model for country based articles sorting
Aggregator and search engine for African news, blogs, classified

CASE STUDY WWW.VILLAGEDIARY.ORG : 2009
Full data management of user/admin profiles
Full data management of locations/villages
Full data management of diary entries
Full data management of diary entry comments
Full data management of case workers to diary entry relationships
Full data management of diary entry to document types, entry types and subtypes manipulation
Online platform to record cases in villages

Advantages of Active Record • Productivity – Eliminates lots of repetitive code – focus on business logic – Database code is generated automatically • Maintainability – Fewer lines of code – easier to understand – Easier to manage change in the object model • Performance – Lazy loading – associations are fetched when needed – Caching • Database vendor independence – The underlying database is abstracted away – Can be configured outside the application

More about Active Record
You can read more about active record here http://en.wikipedia.org/wiki/Active_record_pattern
Highly integrated into Frameworks like Hibernate(Java), Ruby on Rails(Ruby), KohanaPHP(php), Django(python), Castle MonoRails(C#)‏
Cool Example Code allCars=database.find_all('cars'); cars=database.get_where_brand('cars','mercedes'); cars=database.get('cars',1).owner.name;

Thank you For more informationa about me www.afrovisiongroup.com http://mambenanje.blogspot.com www.twitter.com/mambenanje www.facebook.com/mambenanje other links www.blackamphi.com www.nexdimempire.com

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Active Records Barcamp Cameroon 2009

by Mambe Nanje on Nov 09, 2009

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Active Records Barcamp Cameroon 2009 — Presentation Transcript