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Copyright 2009 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.
ColdFusion 9 : ORM
Rupesh Kumar
Sr. Computer Scientist
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Copyright 2009 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.
Agenda
What is ORM?
Why do you want it?
Configuration
Basic CRUD
Relationship
Q & A
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What is ORM?
Object-relational mapping
A persistence framework to map objects to the relational database without writing SQL.
A programming technique for converting data between incompatible type systems in relational databases and object-oriented programming languages.
ColdFusion ORM – based on Hibernate One of the most mature and popular persistence framework
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Why do you want it?
Write less code – easy to maintain Easy to write
Focus on the business logic
Persistence taken care by the framework
Application much cleaner and better encapsulation
No repetitive and error prone SQL queries
Database vendor independence
Flexible to changes in the table/column names
Built in concurrency, caching and other optimizations.
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Configuration
All configuration done in application.cfc
Set up the datasource
Enable ORM in the application.cfc Lots of configuration using ormsettings
Sample Application.cfc
<cfset this.name = "ArtGalleryApp"> <cfset this.ormenabled = "true"><cfset this.datasource = "cfartgallery">
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Configuration…
Write your Object definition Persistent CFC using persistent=“true”
Field using cfproperty
Map your components CFC Tables
Cfproperty Columns
Mapping using CFC metadata
Mapping using hibernate mapping files
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Persistent CFC
lot of attributes on CFC and cfproperty added for orm metadata
Attributes can also be specified using cfscript annotation
Work with the objects and its data will be persisted using ORM methods.
Use persistent=“true”
Copyright 2009 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.
Basic Demo
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ORM CRUD Functions
EntityNew()
EntityLoad()
EntitySave()
EntityDelete()
EntityLoadByExample()
EntityLoadByPK()
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Relationship Mapping
One-To-One
One-To-Many
Many-To-One
Many-To-Many
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Many-to-One
<cfcomponent persistent="true” ><cfproperty name=”name" column="employeeID" fieldtype="id" /><cfproperty name=”name" column=”name" /><cfproperty name="department" fieldtype="many-to-one" cfc="department" />
</cfcomponent>
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Embedded Mapping
Simulate sub objects without creating multiple tables
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ColdFusion 9’s ORM Not so Basics
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Advanced Topics
Covered in later session
More on Relationships
More on Mappings
HQL
Event Handling
Transactions
Caching
Hibernate Access ORM Session Management
Config files
Copyright 2009 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.
Important Concepts
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CFQuery is alive and well
Multiple datasource per application
Reporting
Preference
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Why so many options?
Objects and tables don’t line up
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RAD Workflow
Bolt to generate ORM code
Modify ORM to meet your needs Display functions
Business Logic
Write your front end ColdFusion created HTML
ColdFusion UI components
Flex front End
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Agenda – ORM II
Advanced Mappings
What happens internally
Transaction & concurrency control
Caching & optimization
Logging & Event Handling
Auto-generation of tables
Q & A
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Any Questions?
Terry [email protected]
http://terrenceryan.com
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