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when i make a scan to barcode is not equal to the barcode in the product 

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Hi,

If your product's barcode is generated automatically, check to see that it is functioning properly.
Then check the barcode of the corresponding product while scanning the barcode.

Let's say there is a field for scanning the barcode when the product moves, in that case you can use the following code:

scan_barcode = fields.Char(
string="scan product",
help="scan barcode of product here")

@api.onchange('scan_barcode')
def onchange_scan_barcode(self):
"""checking barcode with the corresponding product"""
order_product = self.env['product.product'].search(
[('barcode', '=', self.scan_barcode)])
lst=[]
if order_product:
for rec in self.move_ids:
lst.append(rec.product_id.id)
for rec in self.move_ids:
if order_product.id in lst:
if order_product.id == rec.product_id.id:
po= self.env['purchase.order'].search([('name','=',self.origin)])
for product in po.order_line:
if product.product_id.id == rec.product_id.id:
rec.scanned_count += 1
rec.product_uom_qty += 1
rec.product_barcode=self.scan_barcode
self.scan_barcode = 0
break
else:
vals = {
'name': order_product.name,
'product_id': order_product.id,
'reference': rec.reference,
'product_uom_qty': 1,
'product_barcode':self.scan_barcode,
'product_uom': order_product.uom_id.id,
'picking_type_id': rec.picking_type_id.id,
'origin': rec.origin,
'scanned_count':1,
'location_id': rec.location_id,
'location_dest_id':rec.location_dest_id
}
self.write({
'move_ids': [(0, 0, vals),]
})
lst.append(order_product.id)
break
else:
raise ValidationError(_('Sorry there is no product with such barcode'))
self.scan_barcode = 0

Regards 

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