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<?php
/**
* CActiveForm class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/

/**
* CActiveForm provides a set of methods that can help to simplify the creation
* of complex and interactive HTML forms that are associated with data models.
*
* The 'beginWidget' and 'endWidget' call of CActiveForm widget will render
* the open and close form tags. Most other methods of CActiveForm are wrappers
* of the corresponding 'active' methods in {@link CHtml}. Calling them in between
* the 'beginWidget' and 'endWidget' calls will render text labels, input fields,
* etc. For example, calling {@link CActiveForm::textField}
* would generate an input field for a specified model attribute.
*
* What makes CActiveForm extremely useful is its support for data validation.
* CActiveForm supports data validation at three levels:
* <ul>
* <li>server-side validation: the validation is performed at server side after
* the whole page containing the form is submitted. If there is any validation error,
* CActiveForm will render the error in the page back to user.</li>
* <li>AJAX-based validation: when the user enters data into an input field,
* an AJAX request is triggered which requires server-side validation. The validation
* result is sent back in AJAX response and the input field changes its appearance
* accordingly.</li>
* <li>client-side validation (available since version 1.1.7):
* when the user enters data into an input field,
* validation is performed on the client side using JavaScript. No server contact
* will be made, which reduces the workload on the server.</li>
* </ul>
*
* All these validations share the same set of validation rules declared in
* the associated model class. CActiveForm is designed in such a way that
* all these validations will lead to the same user interface changes and error
* message content.
*
* To ensure data validity, server-side validation is always performed.
* By setting {@link enableAjaxValidation} to true, one can enable AJAX-based validation;
* and by setting {@link enableClientValidation} to true, one can enable client-side validation.
* Note that in order to make the latter two validations work, the user's browser
* must has its JavaScript enabled. If not, only the server-side validation will
* be performed.
*
* The AJAX-based validation and client-side validation may be used together
* or separately. For example, in a user registration form, one may use AJAX-based
* validation to check if the user has picked a unique username, and use client-side
* validation to ensure all required fields are entered with data.
* Because the AJAX-based validation may bring extra workload on the server,
* if possible, one should mainly use client-side validation.
*
* The AJAX-based validation has a few limitations. First, it does not work
* with file upload fields. Second, it should not be used to perform validations that
* may cause server-side state changes. Third, it is not designed
* to work with tabular data input for the moment.
*
* Support for client-side validation varies for different validators. A validator
* will support client-side validation only if it implements {@link CValidator::clientValidateAttribute}
* and has its {@link CValidator::enableClientValidation} property set true.
* At this moment, the following core validators support client-side validation:
* <ul>
* <li>{@link CBooleanValidator}</li>
* <li>{@link CCaptchaValidator}</li>
* <li>{@link CCompareValidator}</li>
* <li>{@link CEmailValidator}</li>
* <li>{@link CNumberValidator}</li>
* <li>{@link CRangeValidator}</li>
* <li>{@link CRegularExpressionValidator}</li>
* <li>{@link CRequiredValidator}</li>
* <li>{@link CStringValidator}</li>
* <li>{@link CUrlValidator}</li>
* </ul>
*
* CActiveForm relies on CSS to customize the appearance of input fields
* which are in different validation states. In particular, each input field
* may be one of the four states: initial (not validated),
* validating, error and success. To differentiate these states, CActiveForm
* automatically assigns different CSS classes for the last three states
* to the HTML element containing the input field.
* By default, these CSS classes are named as 'validating', 'error' and 'success',
* respectively. We may customize these CSS classes by configuring the
* {@link clientOptions} property or specifying in the {@link error} method.
*
* The following is a piece of sample view code showing how to use CActiveForm:
*
* <pre>
* <?php $form = $this->beginWidget('CActiveForm', array(
* 'id'=>'user-form',
* 'enableAjaxValidation'=>true,
* 'enableClientValidation'=>true,
* 'focus'=>array($model,'firstName'),
* )); ?>
*
* <?php echo $form->errorSummary($model); ?>
*
* <div class="row">
* <?php echo $form->labelEx($model,'firstName'); ?>
* <?php echo $form->textField($model,'firstName'); ?>
* <?php echo $form->error($model,'firstName'); ?>
* </div>
* <div class="row">
* <?php echo $form->labelEx($model,'lastName'); ?>
* <?php echo $form->textField($model,'lastName'); ?>
* <?php echo $form->error($model,'lastName'); ?>
* </div>
*
* <?php $this->endWidget(); ?>
* </pre>
*
* To respond to the AJAX validation requests, we need the following class code:
* <pre>
* public function actionCreate()
* {
* $model=new User;
* $this->performAjaxValidation($model);
* if(isset($_POST['User']))
* {
* $model->attributes=$_POST['User'];
* if($model->save())
* $this->redirect('index');
* }
* $this->render('create',array('model'=>$model));
* }
*
* protected function performAjaxValidation($model)
* {
* if(isset($_POST['ajax']) && $_POST['ajax']==='user-form')
* {
* echo CActiveForm::validate($model);
* Yii::app()->end();
* }
* }
* </pre>
*
* In the above code, if we do not enable the AJAX-based validation, we can remove
* the <code>performAjaxValidation</code> method and its invocation.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.web.widgets
* @since 1.1.1
*/
class CActiveForm extends CWidget
{
/**
* @var mixed the form action URL (see {@link CHtml::normalizeUrl} for details about this parameter).
* If not set, the current page URL is used.
*/
public $action='';
/**
* @var string the form submission method. This should be either 'post' or 'get'.
* Defaults to 'post'.
*/
public $method='post';
/**
* @var boolean whether to generate a stateful form (See {@link CHtml::statefulForm}). Defaults to false.
*/
public $stateful=false;
/**
* @var string the CSS class name for error messages. Defaults to 'errorMessage'.
* Individual {@link error} call may override this value by specifying the 'class' HTML option.
*/
public $errorMessageCssClass='errorMessage';
/**
* @var array additional HTML attributes that should be rendered for the form tag.
*/
public $htmlOptions=array();
/**
* @var array the options to be passed to the javascript validation plugin.
* The following options are supported:
* <ul>
* <li>ajaxVar: string, the name of the parameter indicating the request is an AJAX request.
* When the AJAX validation is triggered, a parameter named as this property will be sent
* together with the other form data to the server. The parameter value is the form ID.
* The server side can then detect who triggers the AJAX validation and react accordingly.
* Defaults to 'ajax'.</li>
* <li>validationUrl: string, the URL that performs the AJAX validations.
* If not set, it will take the value of {@link action}.</li>
* <li>validationDelay: integer, the number of milliseconds that an AJAX validation should be
* delayed after an input is changed. A value 0 means the validation will be triggered immediately
* when an input is changed. A value greater than 0 means changing several inputs may only
* trigger a single validation if they happen fast enough, which may help reduce the server load.
* Defaults to 200 (0.2 second).</li>
* <li>validateOnSubmit: boolean, whether to perform AJAX validation when the form is being submitted.
* If there are any validation errors, the form submission will be stopped.
* Defaults to false.</li>
* <li>validateOnChange: boolean, whether to trigger an AJAX validation
* each time when an input's value is changed. You may want to turn this off
* if it causes too much performance impact, because each AJAX validation request
* will submit the data of the whole form. Defaults to true.</li>
* <li>validateOnType: boolean, whether to trigger an AJAX validation each time when the user
* presses a key. When setting this property to be true, you should tune up the 'validationDelay'
* option to avoid triggering too many AJAX validations. Defaults to false.</li>
* <li>hideErrorMessage: boolean, whether to hide the error message even if there is an error.
* Defaults to false, which means the error message will show up whenever the input has an error.</li>
* <li>inputContainer: string, the jQuery selector for the HTML element containing the input field.
* During the validation process, CActiveForm will set different CSS class for the container element
* to indicate the state change. If not set, it means the closest 'div' element that contains the input field.</li>
* <li>errorCssClass: string, the CSS class to be assigned to the container whose associated input
* has AJAX validation error. Defaults to 'error'.</li>
* <li>successCssClass: string, the CSS class to be assigned to the container whose associated input
* passes AJAX validation without any error. Defaults to 'success'.</li>
* <li>validatingCssClass: string, the CSS class to be assigned to the container whose associated input
* is currently being validated via AJAX. Defaults to 'validating'.</li>
* <li>errorMessageCssClass: string, the CSS class assigned to the error messages returned
* by AJAX validations. Defaults to 'errorMessage'.</li>
* <li>beforeValidate: function, the function that will be invoked before performing ajax-based validation
* triggered by form submission action (available only when validateOnSubmit is set true).
* The expected function signature should be <code>beforeValidate(form) {...}</code>, where 'form' is
* the jquery representation of the form object. If the return value of this function is NOT true, the validation
* will be cancelled.
*
* Note that because this option refers to a js function, you should prefix the value with 'js:' to prevent it
* from being encoded as a string. This option has been available since version 1.1.3.</li>
* <li>afterValidate: function, the function that will be invoked after performing ajax-based validation
* triggered by form submission action (available only when validateOnSubmit is set true).
* The expected function signature should be <code>afterValidate(form, data, hasError) {...}</code>, where 'form' is
* the jquery representation of the form object; 'data' is the JSON response from the server-side validation; 'hasError'
* is a boolean value indicating whether there is any validation error. If the return value of this function is NOT true,
* the normal form submission will be cancelled.
*
* Note that because this option refers to a js function, you should prefix the value with 'js:' to prevent it
* from being encoded as a string. This option has been available since version 1.1.3.</li>
* <li>beforeValidateAttribute: function, the function that will be invoked before performing ajax-based validation
* triggered by a single attribute input change. The expected function signature should be
* <code>beforeValidateAttribute(form, attribute) {...}</code>, where 'form' is the jquery representation of the form object
* and 'attribute' refers to the js options for the triggering attribute (see {@link error}).
* If the return value of this function is NOT true, the validation will be cancelled.
*
* Note that because this option refers to a js function, you should prefix the value with 'js:' to prevent it
* from being encoded as a string. This option has been available since version 1.1.3.</li>
* <li>afterValidateAttribute: function, the function that will be invoked after performing ajax-based validation
* triggered by a single attribute input change. The expected function signature should be
* <code>afterValidateAttribute(form, attribute, data, hasError) {...}</code>, where 'form' is the jquery
* representation of the form object; 'attribute' refers to the js options for the triggering attribute (see {@link error});
* 'data' is the JSON response from the server-side validation; 'hasError' is a boolean value indicating whether
* there is any validation error.
*
* Note that because this option refers to a js function, you should prefix the value with 'js:' to prevent it
* from being encoded as a string. This option has been available since version 1.1.3.</li>
* </ul>
*
* Some of the above options may be overridden in individual calls of {@link error()}.
* They include: validationDelay, validateOnChange, validateOnType, hideErrorMessage,
* inputContainer, errorCssClass, successCssClass, validatingCssClass, beforeValidateAttribute, afterValidateAttribute.
*/
public $clientOptions=array();
/**
* @var boolean whether to enable data validation via AJAX. Defaults to false.
* When this property is set true, you should respond to the AJAX validation request on the server side as shown below:
* <pre>
* public function actionCreate()
* {
* $model=new User;
* if(isset($_POST['ajax']) && $_POST['ajax']==='user-form')
* {
* echo CActiveForm::validate($model);
* Yii::app()->end();
* }
* ......
* }
* </pre>
*/
public $enableAjaxValidation=false;
/**
* @var boolean whether to enable client-side data validation. Defaults to false.
*
* When this property is set true, client-side validation will be performed by validators
* that support it (see {@link CValidator::enableClientValidation} and {@link CValidator::clientValidateAttribute}).
*
* @see error
* @since 1.1.7
*/
public $enableClientValidation=false;

/**
* @var mixed form element to get initial input focus on page load.
*
* Defaults to null meaning no input field has a focus.
* If set as array, first element should be model and second element should be the attribute.
* If set as string any jQuery selector can be used
*
* Example - set input focus on page load to:
* <ul>
* <li>'focus'=>array($model,'username') - $model->username input filed</li>
* <li>'focus'=>'#'.CHtml::activeId($model,'username') - $model->username input field</li>
* <li>'focus'=>'#LoginForm_username' - input field with ID LoginForm_username</li>
* <li>'focus'=>'input[type="text"]:first' - first input element of type text</li>
* <li>'focus'=>'input:visible:enabled:first' - first visible and enabled input element</li>
* <li>'focus'=>'input:text[value=""]:first' - first empty input</li>
* </ul>
*
* @since 1.1.4
*/
public $focus;
/**
* @var array the javascript options for model attributes (input ID => options)
* @see error
* @since 1.1.7
*/
protected $attributes=array();
/**
* @var string the ID of the container element for error summary
* @see errorSummary
* @since 1.1.7
*/
protected $summaryID;

/**
* Initializes the widget.
* This renders the form open tag.
*/
public function init()
{
if(!isset($this->htmlOptions['id']))
$this->htmlOptions['id']=$this->id;
if($this->stateful)
echo CHtml::statefulForm($this->action, $this->method, $this->htmlOptions);
else
echo CHtml::beginForm($this->action, $this->method, $this->htmlOptions);
}

/**
* Runs the widget.
* This registers the necessary javascript code and renders the form close tag.
*/
public function run()
{
if(is_array($this->focus))
$this->focus="#".CHtml::activeId($this->focus[0],$this->focus[1]);

echo CHtml::endForm();
$cs=Yii::app()->clientScript;
if(!$this->enableAjaxValidation && !$this->enableClientValidation || empty($this->attributes))
{
if($this->focus!==null)
{
$cs->registerCoreScript('jquery');
$cs->registerScript('CActiveForm#focus',"
if(!window.location.hash)
$('".$this->focus."').focus();
");
}
return;
}

$options=$this->clientOptions;
if(isset($this->clientOptions['validationUrl']) && is_array($this->clientOptions['validationUrl']))
$options['validationUrl']=CHtml::normalizeUrl($this->clientOptions['validationUrl']);

$options['attributes']=array_values($this->attributes);

if($this->summaryID!==null)
$options['summaryID']=$this->summaryID;

if($this->focus!==null)
$options['focus']=$this->focus;

$options=CJavaScript::encode($options);
$cs->registerCoreScript('yiiactiveform');
$id=$this->id;
$cs->registerScript(__CLASS__.'#'.$id,"\$('#$id').yiiactiveform($options);");
}

/**
* Displays the first validation error for a model attribute.
* This is similar to {@link CHtml::error} except that it registers the model attribute
* so that if its value is changed by users, an AJAX validation may be triggered.
* @param CModel $model the data model
* @param string $attribute the attribute name
* @param array $htmlOptions additional HTML attributes to be rendered in the container div tag.
* Besides all those options available in {@link CHtml::error}, the following options are recognized in addition:
* <ul>
* <li>validationDelay</li>
* <li>validateOnChange</li>
* <li>validateOnType</li>
* <li>hideErrorMessage</li>
* <li>inputContainer</li>
* <li>errorCssClass</li>
* <li>successCssClass</li>
* <li>validatingCssClass</li>
* <li>beforeValidateAttribute</li>
* <li>afterValidateAttribute</li>
* </ul>
* These options override the corresponding options as declared in {@link options} for this
* particular model attribute. For more details about these options, please refer to {@link clientOptions}.
* Note that these options are only used when {@link enableAjaxValidation} or {@link enableClientValidation}
* is set true.
*
* When client-side validation is enabled, an option named "clientValidation" is also recognized.
* This option should take a piece of JavaScript code to perform client-side validation. In the code,
* the variables are predefined:
* <ul>
* <li>value: the current input value associated with this attribute.</li>
* <li>messages: an array that may be appended with new error messages for the attribute.</li>
* <li>attribute: a data structure keeping all client-side options for the attribute</li>
* </ul>
* @param boolean $enableAjaxValidation whether to enable AJAX validation for the specified attribute.
* Note that in order to enable AJAX validation, both {@link enableAjaxValidation} and this parameter
* must be true.
* @param boolean $enableClientValidation whether to enable client-side validation for the specified attribute.
* Note that in order to enable client-side validation, both {@link enableClientValidation} and this parameter
* must be true. This parameter has been available since version 1.1.7.
* @return string the validation result (error display or success message).
* @see CHtml::error
*/
public function error($model,$attribute,$htmlOptions=array(),$enableAjaxValidation=true,$enableClientValidation=true)
{
if(!$this->enableAjaxValidation)
$enableAjaxValidation=false;
if(!$this->enableClientValidation)
$enableClientValidation=false;

if(!isset($htmlOptions['class']))
$htmlOptions['class']=$this->errorMessageCssClass;

if(!$enableAjaxValidation && !$enableClientValidation)
return CHtml::error($model,$attribute,$htmlOptions);

$id=CHtml::activeId($model,$attribute);
$inputID=isset($htmlOptions['inputID']) ? $htmlOptions['inputID'] : $id;
unset($htmlOptions['inputID']);
if(!isset($htmlOptions['id']))
$htmlOptions['id']=$inputID.'_em_';

$option=array(
'id'=>$id,
'inputID'=>$inputID,
'errorID'=>$htmlOptions['id'],
'model'=>get_class($model),
'name'=>$attribute,
'enableAjaxValidation'=>$enableAjaxValidation,
);

$optionNames=array(
'validationDelay',
'validateOnChange',
'validateOnType',
'hideErrorMessage',
'inputContainer',
'errorCssClass',
'successCssClass',
'validatingCssClass',
'beforeValidateAttribute',
'afterValidateAttribute',
);
foreach($optionNames as $name)
{
if(isset($htmlOptions[$name]))
{
$option[$name]=$htmlOptions[$name];
unset($htmlOptions[$name]);
}
}
if($model instanceof CActiveRecord && !$model->isNewRecord)
$option['status']=1;

if($enableClientValidation)
{
$validators=isset($htmlOptions['clientValidation']) ? array($htmlOptions['clientValidation']) : array();
foreach($model->getValidators($attribute) as $validator)
{
if($enableClientValidation && $validator->enableClientValidation)
{
if(($js=$validator->clientValidateAttribute($model,$attribute))!='')
$validators[]=$js;
}
}
if($validators!==array())
$option['clientValidation']="js:function(value, messages, attribute) {\n".implode("\n",$validators)."\n}";
}

$html=CHtml::error($model,$attribute,$htmlOptions);
if($html==='')
{
if(isset($htmlOptions['style']))
$htmlOptions['style']=rtrim($htmlOptions['style'],';').';display:none';
else
$htmlOptions['style']='display:none';
$html=CHtml::tag('div',$htmlOptions,'');
}

$this->attributes[$inputID]=$option;
return $html;
}

/**
* Displays a summary of validation errors for one or several models.
* This method is very similar to {@link CHtml::errorSummary} except that it also works
* when AJAX validation is performed.
* @param mixed $models the models whose input errors are to be displayed. This can be either
* a single model or an array of models.
* @param string $header a piece of HTML code that appears in front of the errors
* @param string $footer a piece of HTML code that appears at the end of the errors
* @param array $htmlOptions additional HTML attributes to be rendered in the container div tag.
* @return string the error summary. Empty if no errors are found.
* @see CHtml::errorSummary
*/
public function errorSummary($models,$header=null,$footer=null,$htmlOptions=array())
{
if(!$this->enableAjaxValidation && !$this->enableClientValidation)
return CHtml::errorSummary($models,$header,$footer,$htmlOptions);

if(!isset($htmlOptions['id']))
$htmlOptions['id']=$this->id.'_es_';
$html=CHtml::errorSummary($models,$header,$footer,$htmlOptions);
if($html==='')
{
if($header===null)
$header='<p>'.Yii::t('yii','Please fix the following input errors:').'</p>';
if(!isset($htmlOptions['class']))
$htmlOptions['class']=CHtml::$errorSummaryCss;
$htmlOptions['style']=isset($htmlOptions['style']) ? rtrim($htmlOptions['style'],';').';display:none' : 'display:none';
$html=CHtml::tag('div',$htmlOptions,$header."\n<ul><li>dummy</li></ul>".$footer);
}

$this->summaryID=$htmlOptions['id'];
return $html;
}

/**
* Renders an HTML label for a model attribute.
* This method is a wrapper of {@link CHtml::activeLabel}.
* Please check {@link CHtml::activeLabel} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $htmlOptions additional HTML attributes.
* @return string the generated label tag
*/
public function label($model,$attribute,$htmlOptions=array())
{
return CHtml::activeLabel($model,$attribute,$htmlOptions);
}

/**
* Renders an HTML label for a model attribute.
* This method is a wrapper of {@link CHtml::activeLabelEx}.
* Please check {@link CHtml::activeLabelEx} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $htmlOptions additional HTML attributes.
* @return string the generated label tag
*/
public function labelEx($model,$attribute,$htmlOptions=array())
{
return CHtml::activeLabelEx($model,$attribute,$htmlOptions);
}

/**
* Renders a text field for a model attribute.
* This method is a wrapper of {@link CHtml::activeTextField}.
* Please check {@link CHtml::activeTextField} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $htmlOptions additional HTML attributes.
* @return string the generated input field
*/
public function textField($model,$attribute,$htmlOptions=array())
{
return CHtml::activeTextField($model,$attribute,$htmlOptions);
}

/**
* Renders a hidden field for a model attribute.
* This method is a wrapper of {@link CHtml::activeHiddenField}.
* Please check {@link CHtml::activeHiddenField} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $htmlOptions additional HTML attributes.
* @return string the generated input field
*/
public function hiddenField($model,$attribute,$htmlOptions=array())
{
return CHtml::activeHiddenField($model,$attribute,$htmlOptions);
}

/**
* Renders a password field for a model attribute.
* This method is a wrapper of {@link CHtml::activePasswordField}.
* Please check {@link CHtml::activePasswordField} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $htmlOptions additional HTML attributes.
* @return string the generated input field
*/
public function passwordField($model,$attribute,$htmlOptions=array())
{
return CHtml::activePasswordField($model,$attribute,$htmlOptions);
}

/**
* Renders a text area for a model attribute.
* This method is a wrapper of {@link CHtml::activeTextArea}.
* Please check {@link CHtml::activeTextArea} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $htmlOptions additional HTML attributes.
* @return string the generated text area
*/
public function textArea($model,$attribute,$htmlOptions=array())
{
return CHtml::activeTextArea($model,$attribute,$htmlOptions);
}

/**
* Renders a file field for a model attribute.
* This method is a wrapper of {@link CHtml::activeFileField}.
* Please check {@link CHtml::activeFileField} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $htmlOptions additional HTML attributes
* @return string the generated input field
*/
public function fileField($model,$attribute,$htmlOptions=array())
{
return CHtml::activeFileField($model,$attribute,$htmlOptions);
}

/**
* Renders a radio button for a model attribute.
* This method is a wrapper of {@link CHtml::activeRadioButton}.
* Please check {@link CHtml::activeRadioButton} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $htmlOptions additional HTML attributes.
* @return string the generated radio button
*/
public function radioButton($model,$attribute,$htmlOptions=array())
{
return CHtml::activeRadioButton($model,$attribute,$htmlOptions);
}

/**
* Renders a checkbox for a model attribute.
* This method is a wrapper of {@link CHtml::activeCheckBox}.
* Please check {@link CHtml::activeCheckBox} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $htmlOptions additional HTML attributes.
* @return string the generated check box
*/
public function checkBox($model,$attribute,$htmlOptions=array())
{
return CHtml::activeCheckBox($model,$attribute,$htmlOptions);
}

/**
* Renders a dropdown list for a model attribute.
* This method is a wrapper of {@link CHtml::activeDropDownList}.
* Please check {@link CHtml::activeDropDownList} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $data data for generating the list options (value=>display)
* @param array $htmlOptions additional HTML attributes.
* @return string the generated drop down list
*/
public function dropDownList($model,$attribute,$data,$htmlOptions=array())
{
return CHtml::activeDropDownList($model,$attribute,$data,$htmlOptions);
}

/**
* Renders a list box for a model attribute.
* This method is a wrapper of {@link CHtml::activeListBox}.
* Please check {@link CHtml::activeListBox} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $data data for generating the list options (value=>display)
* @param array $htmlOptions additional HTML attributes.
* @return string the generated list box
*/
public function listBox($model,$attribute,$data,$htmlOptions=array())
{
return CHtml::activeListBox($model,$attribute,$data,$htmlOptions);
}

/**
* Renders a checkbox list for a model attribute.
* This method is a wrapper of {@link CHtml::activeCheckBoxList}.
* Please check {@link CHtml::activeCheckBoxList} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $data value-label pairs used to generate the check box list.
* @param array $htmlOptions addtional HTML options.
* @return string the generated check box list
*/
public function checkBoxList($model,$attribute,$data,$htmlOptions=array())
{
return CHtml::activeCheckBoxList($model,$attribute,$data,$htmlOptions);
}

/**
* Renders a radio button list for a model attribute.
* This method is a wrapper of {@link CHtml::activeRadioButtonList}.
* Please check {@link CHtml::activeRadioButtonList} for detailed information
* about the parameters for this method.
* @param CModel $model the data model
* @param string $attribute the attribute
* @param array $data value-label pairs used to generate the radio button list.
* @param array $htmlOptions addtional HTML options.
* @return string the generated radio button list
*/
public function radioButtonList($model,$attribute,$data,$htmlOptions=array())
{
return CHtml::activeRadioButtonList($model,$attribute,$data,$htmlOptions);
}

/**
* Validates one or several models and returns the results in JSON format.
* This is a helper method that simplifies the way of writing AJAX validation code.
* @param mixed $models a single model instance or an array of models.
* @param array $attributes list of attributes that should be validated. Defaults to null,
* meaning any attribute listed in the applicable validation rules of the models should be
* validated. If this parameter is given as a list of attributes, only
* the listed attributes will be validated.
* @param boolean $loadInput whether to load the data from $_POST array in this method.
* If this is true, the model will be populated from <code>$_POST[ModelClass]</code>.
* @return string the JSON representation of the validation error messages.
*/
public static function validate($models, $attributes=null, $loadInput=true)
{
$result=array();
if(!is_array($models))
$models=array($models);
foreach($models as $model)
{
if($loadInput && isset($_POST[get_class($model)]))
$model->attributes=$_POST[get_class($model)];
$model->validate($attributes);
foreach($model->getErrors() as $attribute=>$errors)
$result[CHtml::activeId($model,$attribute)]=$errors;
}
return function_exists('json_encode') ? json_encode($result) : CJSON::encode($result);
}
}
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