Error when creating an Edit Block: Fatal error: Call to a member function setData()

Question

Trying to create a custom module to upload .xls file to the magento database. This is the error I get after creating the Edit block for the dashboard:

Fatal error: Call to a member function setData() on boolean in /opt/lampp/htdocs/magento/app/code/core/Mage/Adminhtml/Block/Widget/Form/Container.php on line 141

This is my Mymodule/Wine/Block/Adminhtml/Wine/Edit.php

<?php
class Mymodule_Wine_Block_Adminhtml_Wine_Edit extends Mage_Adminhtml_Block_Widget_Form_Container
{
 public function __construct()
 {
 parent::__construct();
 $this->_objectId = 'id';
 $this->_blockGroup = 'wine';
 $this->_controller = 'adminhtml_wine';
 $this->_updateButton('save', 'label', Mage::helper('wine')->__('Save Changes'));
 $this->_updateButton('delete', 'label', Mage::helper('wine')->__('Delete Item'));
 }
 public function getHeaderText()
 {
 if (Mage::registry('wine_data') && Mage::registry('wine_data')->getId()) {
 return Mage::helper('wine')->__('Edit Item \'%s\'', $this->htmlEscape(Mage::registry('wine_data')->getTitle()));
 } else {
 return Mage::helper('wine')->__('Upload .xls file');
 }
 }
}

And this is the part of config.xml which corresponds to blocks:

<blocks>
 <wine>
 <class>Mymodule_Wine_Block</class>
 </wine>
</blocks>

Answer 1

I think you are missing the file Mymodule/Wine/Block/Adminhtml/Wine/Edit/Form.php
This should be its content:

<?php 
class Mymodule_Wine_Block_Adminhtml_Wine_Edit_Form extends Mage_Adminhtml_Block_Widget_Form
{
 protected function _prepareForm()
 {
 $form = new Varien_Data_Form(
 array(
 'id' => 'edit_form',
 'action' => $this->getUrl(
 '*/*/save',
 array(
 'id' => $this->getRequest()->getParam('id')
 )
 ),
 'method' => 'post',
 'enctype' => 'multipart/form-data' //add this only if you have file uploads
 )
 );
 $form->setUseContainer(true);
 $this->setForm($form);
 return parent::_prepareForm();
 }
}

• Radu Dascălu: Thank you, you were right, I did not make the Form.php file. Any resource where are described all the dependencies for Magento 1.9 modules?
• Marius: @RaduDascălu. Sorry I don't know one. I''m sure there are, but I don't know them.