multiple checkbox valiadation for any one in YII frame work for this example - yii

Question

Hi can you please tell how can i validate the multiple checkbox any one is checked in yii framework
array('accept', 'required', 'requiredValue' => 1, 'message' => 'You should select alteast one')

Answer 1

As these value are usually sent as arrays, I wrote an array validator for these cases once: https://github.com/schmunk42/p3extensions/blob/master/validators/P3ArrayValidator.php
Usage example:
array('accept',
'ext.validators.P3ArrayValidator',
'min'=>1,
'allowEmpty'=>false,
'message' => 'You should select at least one'
),

Answer 2

sorry for the late reply.
But, I found a solution without installing any extension.
Take a hidden field with the same name [Checkboxes list field].
<?php echo $form->hiddenField($model,'categories');?>
Display a list of categories with name different from our field name (multiple checkboxes).
But, remember the 'class', and play with the class to save the values.
<?php
echo CHtml::checkBoxList(
'group',
//you can pass the array here which you want to be pre checked
explode(',', trim($model->attributes['categories'], ',')),
CHtml::listData(Category::model()->findAll(),'id','name'),
array('separator'=>'', 'template'=>'<tr><td style="width:5%;">{input}</td><td>{label}</td></tr>', 'class' => 'group')
);
?>
This way validation should work also, you get category ids as comma separated e.g. [,1,2,6,]
<script>
$(function(){
$(".group").click(function(){
var str = $('.group:checked').map(function() {
return this.value;
}).get().join();
var groupCats = (str.length > 0) ? ','+str+',' : '';
$('#ModelNAME_field').val(groupCats);
// Get the 'ModelNAME_field' by viewing source of HTML of hidden field.
});
});
</script>