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CakePHP JQValidator
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CakePHP JQValidator is a plugin for a CakePHP application used for client-side data validation 
defined within the CakePHP model. On the server side it's a standard CakePHP plugin, and on the
client side it's written in jQuery (currently developed for jQuery 1.4.2). If you wish to know 
more, read on...

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Functionality
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The idea of JQValidator is to have a data validation defined in CakePHP models prior to sending
the information to the server. This has many advantages, reducing the number of server requests,
making the work faster are just some of them.

After defining the validation in your model like so:

var $validate = array
(
	'notemptyfield' => array
	(
		'notempty' => array
		(
				'rule' => array('notempty'),
				'message' => 'Validation message #1',
		),
	),
	'numericfield' => array
	(
		'numeric' => array
		(
			'rule' => array('numeric'),
			'message' => 'Validation message #2',
		),
	),
	'datefield' => array
	(
		'date' => array
		(
			'rule' => array('date'),
			'message' => 'Validation message #3',
		),
	),
);

And using the plugin like in the usage page. You will recieve a nice (actually ugly by my 
opinon) alert dialog notifying you of all errors in your input.

Currently supported datatypes for CakePHP client-side validation are:
 * notempty
 * numeric
 * date

That's all for now, feel free to use this plugin and enhance it, I appretiate all the help.

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Installation
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First you need to install the plugin like so:
 * Download the CakePHP JQValidator plugin from github 
   (http://github.com/barbir/cakephp-jq-validator/archives/master)
 * Unpack the contents of the archive to the plugins folder of the CakePHP project and rename
   the first level folder in the archive (eg: "barbir-cakephp-jq-validator-xxxxxxx") to
   "j_q_validator", and you will have a structure like this "myproject/plugins/j_q_validator/".
 * It's installed… Contents of the "myproject/plugins/j_q_validator/" folder should look 
   like this:
    * controllers
    * views
    * j_q_validator_app_controller.php
    * j_q_validator_app_model.php
    * README

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Usage
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When you install the plugin, you are ready to use it. In order to use the CakePHP JQValidator 
plugin, you need to:
 * include the JQValidator helper and component
 * initialize the validation in your controller
 * render the validation script in your view where you want to use the client side validation
   to appear

Include the JQValidator helper and component
--------------------------------------------

Include the JQValidator component and helper in your controller, by adding 
'JQValidator.JQValidator' to both your $components and $helpers arrays.

var $components = array(... 'JQValidator.JQValidator');
var $helpers = array(... 'JQValidator.JQValidator');

Initialize the validation
-------------------------

In the controller action (in which you wish to use the validation), type the code like in the
following example:

$this->JQValidator->addValidation
(
	'MyModel',
	$this->MyModel->validate,
	__('Save failed, fix the following errors:', true),
	'MyModelAddForm'
);

Parameter description for addValidation function:
 * $modelName - name of the model that contains the fields to validate
 * $validationOptions - validation array of the model to validate
 * $errorMessageTitle - (not mandatory) a title of the message that will be displayed if the 
   validation fails.
 * $formId - (not mandatory) id of the form to validate, if it is not sent, all fields that
   are defined in the $validationOptions for the model with the $modelName will be validated

Render the validation script
----------------------------

In your view you should add the following line to render validation scripts for validating
all defined models:

<?php echo $jQValidator->validator(); ?>

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Licence
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CakePHP JQValidator Plugin is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software Foundation, either 
version 3 of the License, or (at your option) any later version.
 
CakePHP JQValidator Plugin is distributed in the hope that it will be useful, but WITHOUT ANY 
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
PURPOSE. See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License along with CakePHP 
JQValidator Plugin. If not, see http://www.gnu.org/licenses/.