I see a blank page when I go to edit option in my custom module. Instead, I should get a form where I could edit the data

Question

I created a custom module for seller management in magento 1.7.0.2. In the module, the grid for data display is showing fine but when I click the edit button, it redirects fine but shows a blank page. It should show a page similar to the one which comes up when we edit a product. How can I solve this ?

This is my custom module.

This is the blank page.

Instead of the blank page, I want a page similar to the product edit page.

Config.xml

0.1.0 standard Mage_ManageSellers managesellers

<adminhtml>
    <layout>
        <updates>
            <mage_managesellers>
                <file>managesellers.xml</file>
            </mage_managesellers>
        </updates>
    </layout>
</adminhtml>

<global>
    <blocks>
        <managesellers>
            <class>Mage_ManageSellers_Block</class>
        </managesellers>


    </blocks>
    <helpers>
        <managesellers>
            <class>Mage_ManageSellers_Helper</class> 
        </managesellers>
    </helpers>


    <models>
     <managesellers>
        <class>Mage_ManageSellers_Model</class>
        <resourceModel>managesellers_mysql4</resourceModel>
     </managesellers>
     <managesellers_mysql4>
        <class>Mage_ManageSellers_Model_Mysql4</class>
        <entities>
           <managesellers>
              <table>managesellers</table>
           </managesellers>
        </entities>
     </managesellers_mysql4>
  </models>
  <resources>
     <managesellers_setup>
        <setup>
           <managesellers>Mage_ManageSellers</managesellers>
        </setup>
        <connection>
           <use>core_setup</use>
        </connection>
     </managesellers_setup>
     <managesellers_write>
        <connection>
           <use>core_write</use>
        </connection>
     </managesellers_write>
     <managesellers_read>
        <connection>
           <use>core_read</use>
        </connection>
     </managesellers_read>
  </resources>

</global>

IndexController.php

public function indexAction()
{
    $this->loadLayout();
    $this->_title($this->__('Manage Sellers'));
    $myblock = $this->getLayout()->createBlock('managesellers/adminhtml_managesellers');
    $this->_addContent($myblock);
    $this->renderLayout();
}

public function editAction()
{
    $Id = $this->getRequest()->getParam('managesellers_id');
    $model = Mage::getModel('managesellers/managesellers')->load($Id);

    if($model->getId() || $Id == 0) 
    {
        $data = Mage::getSingleton('adminhtml/session')->getFormData(true);
        if (!empty($data)) 
        {
            $model->setData($data);
        }
        Mage::register('managesellers_data', $model);

        $this->loadLayout();
        $this->_setActiveMenu('managesellers/managesellers');

        $this->_addBreadcrumb(
            Mage::helper('adminhtml')->__('Seller Manager'),
            Mage::helper('adminhtml')->__('Seller Manager')
        );

        $this->getLayout()->getBlock('head')->setCanLoadExtJs(true);

        $this->renderLayout();
    }
    else 
    {
        Mage::getSingleton('adminhtml/session')->addError(
            Mage::helper('managesellers')->__('Seller does not exist')
        );
        $this->_redirect('*/*/');
    }
}

public function newAction() 
{
    $this->_forward('edit');
}

Edit.php

public function __construct()
{
    parent::__construct();
    $this->_objectId = 'id';
    $this->_blockGroup = 'managesellers';
    $this->_controller = 'adminhtml_managesellers';
    $this->_updateButton('save', 'label', Mage::helper('managesellers')->__('Save Seller'));
    $this->_updateButton('delete', 'label', Mage::helper('managesellers')->__('Delete Seller'));
}
public function getHeaderText()
{
    if( Mage::registry('managesellers_data') && Mage::registry('managesellers_data')->getId() ) 
    {
        return Mage::helper('managesellers')->__("Edit Seller '%s'", $this->htmlEscape(Mage::registry('managesellers_data')->getTitle()));
    }
    else 
    {
        return Mage::helper('managesellers')->__('Add Seller');
    }
}

layout file

<adminhtml_managesellers_index>
<reference name="content">
    <block type="adminhtml/template" name="root" template="catalog/product/edit.phtml"/>
</reference name="content">
</adminhtml_managesellers_index>

Please help.

Answer 1

Follow this link to create new/edit form in Admin of magento. This will surely fix your problem. please go step-by-step.