致命错误：在Form.php中的非对象上调用成员函数toOptionArray（）

Question

i get this error for my payment interface when config payment methods

'USD', 'label'=>Mage::helper('adminhtml')->__('USD')), array('value' => 'EUR', 'label'=>Mage::helper('adminhtml')->__('EUR')), ); } } ?> 
Fatal error: Call to a member function toOptionArray() on a non-object in C:\xampp\htdocs\pjsnorge2\app\code\core\Mage\Adminhtml\Block\System\Config\Form.php on line 399

and in the processingCurrency.php

class Gspay_Redirect_Model_ProcessingCurrency
{
    public function toOptionArray()
    {
        return array(
            array('value' => 'USD', 'label'=>Mage::helper('adminhtml')->__('USD')),
            array('value' => 'EUR', 'label'=>Mage::helper('adminhtml')->__('EUR')),
        );
    }

}

thanks for your help

Answer 1

To solve the above error. Please open the above path file.

if ($e->source_model) {
$sourceModel = Mage::getSingleton((string)$e->source_model);
if ($sourceModel instanceof Varien_Object) {
$sourceModel->setPath($path);
}
$field->setValues($sourceModel->toOptionArray($fieldType == 'multiselect'));
}

Replace above code with below:

if ($e->source_model) {
$sourceModel = Mage::getSingleton((string)$e->source_model);
if ($sourceModel instanceof Varien_Object) {
$sourceModel->setPath($path);
}
if(is_object($sourceModel)){
$field->setValues($sourceModel->toOptionArray($fieldType == 'multiselect'));
} else {
Mage::log($e->source_model);
}
} 

Refer this link .

Answer 2

Change following code in this file app/code/core/Mage/Adminhtml/Block/System/Config/Form.php that answer by @ILLA at above and it completely working.

if ($e->source_model) 
{
 $sourceModel = Mage::getSingleton((string)$e->source_model);
 if ($sourceModel instanceof Varien_Object) 
 {
  $sourceModel->setPath($path);
 }

 if(is_object($sourceModel))
 {
  if (method_exists($sourceModel, "toOptionArray"))
  {
   $field->setValues($sourceModel->toOptionArray($fieldType == 'multiselect'));
  }
 } 
 else 
 {
  Mage::log($e->source_model);
 }
}