from odoo.osv import expression

class ProductProduct(models.Model):

_inherit = 'product.product'

lot = fields.Char()

@api.model

def name_search(self, name='', args=None, operator='ilike', limit=100):

""" search for product using the Lot number """

self.lot = name

print (self.lot)

args = args or []

recs = None

# only perform search by when the name is passed

if name:

# don't use limit here

recs = self.env['stock.production.lot'].search([('barcode', operator, name)])

if recs:

# handle extra filter that was passed by the domain attribute in the XML

args = expression.AND([args, [('id', 'in', recs.mapped('product_id').ids)]])

return self.search(args, limit=limit).name_get()

# no Lot was founded may be the user meant to search by product name

return super(ProductProduct, self).name_search(name=name,

args=args,

operator=operator,

limit=limit)