Magento 1.9 - User Roles Permission return Fatal error

Question

If i click System -> Permission -> Roles if i click any of roles return following error,

Fatal error: Class 'Mage_Cmsmquickview_Helper_Data' not found in /home/abc/public_html/app/Mage.php on line 547

How to solve thi Issue?

Answer 1

Assumptions for answer:

• Your module's package name is Stack and your module name is Cmsmquickview.
• Your module resides in the local codepool.

Now the definition of your helper class (in app/code/local/Stack/Cmsmquickview/etc/config.xml file) should look like:

<global>
    <helpers>
        <cmsmquickview>
            <class>Stack_Cmsmquickview_Helper</class>
        </cmsmquickview>
    </helpers>
</global>

and the helper class file (app/code/local/Stack/Cmsmquickview/Helper/Data.php) should be like:

<?php
class Stack_Cmsmquickview_Helper_Data extends Mage_Core_Helper_Abstract {
  // your code here
}

now you should call the helper like this:

Mage::helper('cmsmquickview');

Update (after looking into the attached module by @zus):

Change

<children>
    <quickview translate="title" module="cmsmquickview">
        <title>Quick View Settings</title>
        <sort_order>50</sort_order>
    </quickview>
</children>

to:

<children>
    <quickview translate="title" module="ajaxcart">
        <title>Quick View Settings</title>
        <sort_order>50</sort_order>
    </quickview>
</children>

in app/code/local/Cmsmart/AjaxCart/etc/adminhtml.xml file. Notice module="ajaxcart".

This is because you have defined helper as ajaxcart in config.xml file.