Magento 1.9 Fatal Error: Call to a Member Function getBackend() on Boolean – Fix

magento-1.9product

I want to make a simple module who show product details without header footer and other block. At first i try to get product info by id. But that say

Fatal error: Call to a member function getBackend() on boolean in D:\x\htdocs\m1\app\code\core\Mage\Eav\Model\Entity\Abstract.php on line 816

My code

class Abdus_Ajaxproduct_LoadproductController extends Mage_Core_Controller_Front_Action{
public function getbyidAction(){
    $_prdID=$this->getRequest()->getParam('id');
    $_product = Mage::getModel('catalog/product')->getCollection()->addFieldToFilter('id',$_prdID);
}}

Best Answer

Use:

 Mage::getModel('catalog/product')->load($_prdID);

Instead of:

Mage::getModel('catalog/product')->getCollection()->addFieldToFilter('id',$_prdID);

Related Solutions

Magento – Fatal error: Call to a member function getBackend() on a non-object

We had similar issue and it was because of during update new attribute wasn't created via resources process. renaming versions in core_resource table and running update again, error was gone. So it's 99% related to missed attribute

How to Use Where Condition in Customer Collection – Magento 1.9

In EAV models, like the customer, addFieldToFilter is an alias for addAttributeToFilter and only works if the parameter ("read" in your case) is a real EAV attribute of the customer and not a field in the customer_entity table, or any other table.

The error message hints that there is no attribute ($attribute->getBackend() fails because there was no attribute found).

But if read actually is a field in the entity table, you can tell the collection so, using addStaticField():

$collection->addStaticField('read')->addFieldToFilter('read', array('eq' => 0));

Update: I see that the field actually is from a joined table. You need to use joinAttribute or joinField to allow using the field for filters.

I assume, alireza_checkingout_checkingout is a regular table, not an EAV entity:

Replace

->joinTable('alireza_checkingout_checkingout','alireza_customer_id=entity_id',array('alireza_customer_id','read'),null,'left')

with

->joinField('read', 'alireza_checkingout_checkingout', 'read', 'alireza_customer_id=entity_id')

You can even add the filter immediately, as joinField has a $cond parameter:

->joinField('read', 'alireza_checkingout_checkingout', 'read', 'alireza_customer_id=entity_id', '{table}.read=0')

The condition will be added to the ON clause of the join, which is by default an INNER JOIN, so the result is the same as using addFieldToFilter.