model,form and validation

http://blog.csdn.net/nailwl/article/details/5707364

http://www.yiiframework.com/wiki/56/

http://www.playframework.org/documentation/1.0/validation

http://www.playframework.org/documentation/2.0/JavaForms

 http://static.springsource.org/spring/previews/ui-format.html

http://dev.bostone.us/2011/02/03/use-yaml-with-spring-to-load-properties 

http://unrealexpectations.com/blog/2010/03/using-yaml-as-response-format-for-services-in-spring/

http://spring-json.sourceforge.net/

http://sojo.sourceforge.net/

https://github.com/stig/json-framework

http://components.neo4j.org/neo4j-rdf/snapshot/index.html

I have a form which submits a date and I'm using the CJuiDatePicker plugin. It works fine without validation, however, I would like to validate the input and allow the user to submit multiple formats: a year(YYYY); a year and month (YYYY-MM); or a full date (YYYY-MM-DD). I know i could use regular expressions, but don't know where to place it in the model.

public function rules() 
{ 
        // NOTE: you should only define rules for those attributes that 
        // will receive user inputs. 
        return array( 
                array('name','match','pattern'=>'/^([a-zA-Z0-9_-\s])+$/'),                       
        ); 
}