Hi everyone, 

I want to add a search in Product Variants list screen with a custom field, I am already added to the product.template model 

the field name is model_number

and I added with this code 

    class ProductCoNew(models.Model):

        _inherit = 'product.template'

        model_number = fields.Char(string='Model', required=True)

and this is my code to add the search 

        product.product_search_form_view

        product.product

               

                       domain="[('product_tmpl_id.model_number', 'ilike', self)]"/>

           

       

and 

    class ProductProduct(models.Model):

        _inherit = 'product.product'

        model_number_search = fields.Char(related='product_tmpl_id.model_number',

                                          string='DES 1', readonly=True, store=True)

but this code not working and giving me an error.

    Domain on non-relational field "model_number_search" makes no sense (domain:[('product_tmpl_id.model_number', 'ilike', self)])

I do not know what is the problem, 

please can anyone help me,