Kdjykuj

I want delete the existing attribute called Manufacturer. Check if this attribute exists before deleting.

How to do this.

Thanks.

Try this,

In order to remove attribute

$eav_setup->removeAttribute(MagentoCatalogModelProduct::ENTITY, 'attribute_name');

Complete code on InstallData.php

<?php                                                         

namespace VendorModuleSetup;                                      

use MagentoEavSetupEavSetupFactory;                              

use MagentoFrameworkSetupInstallDataInterface;                   

use MagentoFrameworkSetupModuleContextInterface;                 

use MagentoFrameworkSetupModuleDataSetupInterface;             

class InstallData implements InstallDataInterface{

 private $eav_setup_factory;



public function __construct(EavSetupFactory $eav_setup_factory)

{

    $this->eav_setup_factory = $eav_setup_factory;

}



public function install(

    ModuleDataSetupInterface $setup,

    ModuleContextInterface $context

) {

    $eav_setup = $this->eav_setup_factory->create(['setup' => $setup]);



    $eav_setup->removeAttribute(MagentoCatalogModelProduct::ENTITY, 'attribute_name');

    $eav_setup->addAttribute(

        MagentoCatalogModelProduct::ENTITY,

        'rg_customer_group',

        [

            'type'          => 'varchar',

            'frontend'      => '',

            'label'         => 'Allowed Customer Group',

            'input'         => 'multiselect',

            'class'         => '',

            'attribute_set' => 'Default',

            'global'        => MagentoEavModelEntityAttributeScopedAttributeInterface::SCOPE_STORE,

            'visible'       => true,

            'required'      => false,

            'user_defined'  => true,

            'default'       => null,

            'searchable'    => false,

            'filterable'    => false,

            'comparable'    => false,

            'visible_on_front' => false,

            'used_in_product_listing' => true,

            'unique'        => false,

            'apply_to'      => '',

            'system'        => 1,

            'group'         => 'Attributes List'

        ]

    );

    //add product attribute to existing attribute_sets

    $entity_type_id = $eav_setup->getEntityTypeId(MagentoCatalogModelProduct::ENTITY);

    $attribute_set_ids = $eav_setup->getAllAttributeSetIds($entity_type_id);

    foreach ($attribute_set_ids as $attribute_set_id) {

        $group_id = $eav_setup->getAttributeGroupId($entity_type_id, $attribute_set_id, "group_name");

        $eav_setup->addAttributeToGroup(

            $entity_type_id,

            $attribute_set_id,

            $group_id,

            'attribute_name',

            20

        );

    }

}}

Hope this helps :)