Yes, exectly , I want to show warning when user selects a product that have is_dmp True in purchase order line?

Im sorry i past a wrong code in my question hhh , i will edit it with the right one

Hi community , its so urgent Plz

I had add a boolean field in 'product.product' named 'is_dmp'. so , i want that if I try to add an artcile who have this field false in purchase order , a warning message appear .

so this what i did :

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from odoo import api, models

from odoo import fields

from odoo.exceptions import UserError

class product_product(models.Model):

_name = 'product.product'

_inherit = 'product.product'

is_dmp = fields.Boolean(help='Est ce que cet articles doit avoir un certificat d enregistrement', string='Necessite un enregistrement')

dmp = fields.Char('Numéro de certificat')

class PurchaseOrderLineWar(models.Model):

_name = 'purchase.order.line'

_inherit = 'purchase.order.line'

@api.onchange('order_line.product_id')

def _check_dmp(self):

print 'HHHHHHHHHHHHHHHHHHHHHHHHHHHH'

for a in self.order_line:

if a.product_id.is_dmp == True:

raise UserError(_("Please Select Goods your mesage"))

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Plz any idea , i need help .

Just try the code which is in my answer. It will work for you.