Magento 1.9.3 add custom validations for Product form in admin panel

Question

I have added 2 custom attribute on product form. 1.Package type 2.Quantity

MY package type can be single /multiple. When it is multiple , I want to show Quantity inputbox & also , want to apply required validations to it.. For Single ,it should be hidden.

How can I ado this ? & where can I add validations ?

I am new to magento ,so can anyone help me with this?

Answer 1

I am not sure but you can normally create 4 attributes from admin panel. And through JS you can hide those 2 attributes and make them required when it is necessary.

If this works, then this scenario is possible otherwise it is not possible to make them required field on multiple selection. Because then the scenario will be: You want to add that attribute only when multiple selection happens and its not possible to add attribute only at that time.

Answer 2

I solved this by adding this in config.xml file :

<adminhtml>
  <layout>
    <updates>
      <adminhtml_catalog_product_edit>
        <file>custom_local.xml</file>
      </adminhtml_catalog_product_edit>
    </updates>
  </layout>
</adminhtml>

& placed custom_local.xml under \app\design\adminhtml\default\default\layout\ folder .

In custom_local.xml, I added my custom js file for both add & edit product as :

 <layout>
<adminhtml_catalog_product_new>
    <reference name="head">
                <action method="addJs"><script>admin-custom.js</script></action>
    </reference>
</adminhtml_catalog_product_new>

<adminhtml_catalog_product_edit>
    <reference name="head">
                <action method="addJs"><script>admin-custom.js</script>    </action>
    </reference>
</adminhtml_catalog_product_edit>
</layout>

I placed my admin-custom.js under js folder in root directory & added following validations :

if(Validation) 
{  
Validation.add('conditional-required', 'This is a required field.', function(v) {
    var pack_type = $('pack_type').getValue();
    if(pack_type != 0)
    {
        return ( (v != null) && (v.length != 0));
    }
    else
    {
        return true;
    }

});   
}
 document.observe("dom:loaded", bodyOnload);
 function bodyOnload() {

$('bottle_litres').addClassName('required-entry');
//alert($('pack_type').getValue());
var pack_type = $('pack_type').getValue();
if(pack_type == 0) {
    $('no_of_bottles').closest('tr').hide();
    $('no_of_bottles').removeClassName('conditional-required');
} else {
    $('no_of_bottles').closest('tr').show();
    $('no_of_bottles').addClassName('conditional-required');
}


$('pack_type').observe('change', function(e) {
    pack_type = $('pack_type').getValue();//alert(pack_type);
    if(pack_type == 0) {
        $('no_of_bottles').closest('tr').hide();
        $('no_of_bottles').removeClassName('conditional-required');
    } else {
        $('no_of_bottles').closest('tr').show();
        $('no_of_bottles').addClassName('conditional-required');
    }
 });

 }

& it worked :-)