Generate Barcode For Products Using Automated Action In Odoo

Generate barcode for products using automated action in odoo. How to generate and assign sequential value for records in Odoo. How to use automated action in odoo. Product barcode generator in odoo. How to auto generate barcode for products in odoo. Automated action in odoo. How to create and assign value for field using sequence and automated action. Odoo automated action.
Code Used:
for record in records:
if not record['barcode']:
record['barcode'] = env['ir.sequence'].next_by_code('product.barcode')
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