Custom csv Import not working in magento 2.3

Question

While doing importing from backend for custom table its trowing following error

systemException Additional data: Error in data structure: entity values are mixed

but its correct validated in magento 2.3 and Same code is working with magento 2.2.6

Any suggestion please share

Answer 1

In 2.3.1 I found that this code is compulsory. After 2.2.6 magento requires sku compulsory. So this problem is comes. I face this problem and i follow this url. https://github.com/magento/magento2/issues/19761

I put sku in my custom code. and my code is working fine. My problem is solved.

I wrote like this:

class CustomImport extends \Magento\ImportExport\Model\Import\Entity\AbstractEntity { 
const SKU = 'sku'; 
const ADD1 = 'add1'; 
...... 
protected $validColumnNames = [ 
self::DESCRIPTION, 
self::COMPANY, 
self::SKU, 
self::ADD1, 
self::ADD2, 
self::ADD3, 
self::ADD4, 
self::ADD5, 
self::CITY, 
self::STATE, 
self::ZIP, 
self::COUNTRY, 
 ];
}