Magento 1.9 Custom Module Class not Found

Question

I am new in magento. i try to create a custom Module, for admin from tutorial, and when i try to access admin panel i got Fatal error: Uncaught Error: Class 'Mage_Sample_Helper_Data' not found.

And if i disable the module , admin work fine.

Can't understand from where come the Mage alias instead Lern

thank you for help.

files look like this:

folders:

app
  code
    local
      Lern
        Sample

config.xml

  <?xml version="1.0"?>
     <config>
       <modules>
         <Lern_Sample>
           <version>0.1.0</version>
         </Lern_Sample>
       </modules>
       <frontend>
         <routers>
           <sample>
             <use>standard</use>
               <args>
                 <module>Lern_Sample</module>
                 <frontName>sample</frontName>
              </args>
           </sample>
         </routers>
       </frontend>
      <admin>
       <routers>
         <sample>
            <use>admin</use>
            <args>
                <module>Lern_Sample</module>
                <frontName>admin_sample</frontName>
            </args>
        </sample>
       </routers>
      </admin>
  <global>
    <helpers>
        <helloworld>
            <class>Lern_Sample_Helper</class>
        </helloworld>
    </helpers>
</global>
<adminhtml>
    <menu>
        <sample module="sample">
            <title>Sample Module</title>
            <sort_order>100</sort_order>
            <children>
                <sample module="sample">
                    <title>Sample Module</title>
                    <sort_order>0</sort_order>
                    <action>admin_sample/adminhtml_index</action>
                </sample>
            </children>
        </sample>
    </menu>
</adminhtml>

Helpers folder - file Data.php

 class Lern_Sample_Helper_Data extends Mage_Core_Helper_Abstract {

  }

Adminhtml controller:

class Lern_Sample_Adminhtml_IndexController extends Mage_Adminhtml_Controller_Action {

/**
 * Admin controller index action
 *
 * @access public
 * @return void
 */

public function indexAction() {

    echo 'hello world in the admin side..!!!'. '';

   }
 }

then I have a feeling it's to do with your helper class. Also just so you know, support for Magento1.X is due to stop shortly .. so no more security updates etc. - should research Magento 2 :) — treyBake
you should mention it to them briefly - it's pretty darn important to keep safe, especially in an eCommerce business :) and ahh I see well at least you found the issue:) — treyBake

OddBrew OddBrew · Accepted Answer · 2018-07-15T18:58:10

Your helper is called because you declared sample as the helper's module that should be called for translating your menu's titles. But the problem is that in your config.xml, you declared your helpers for your module callable via the string helloworld and not sample. Two ways to fix it.

First way (and the most consistent here, given the name of your module), modify your helper's call like this :

<helpers>
    <sample>
        <class>Lern_Sample_Helper</class>
    </sample>
</helpers>

OR second way, modify the module's helper called in your menu declaration, like this :

<menu>
    <sample module="helloworld">
        <title>Sample Module</title>
        <sort_order>100</sort_order>
        <children>
            <sample module="helloworld">
                <title>Sample Module</title>
                <sort_order>0</sort_order>
                <action>admin_sample/adminhtml_index</action>
            </sample>
        </children>
    </sample>
</menu>

Magento 1.9 Custom Module Class not Found

1 Answers