I need show name of sallers relatined of the product in sales in to sales_roder_line

but In the field show all names of the sallers from all products I need filters this and show only saller of product of the line I try add whit odoo studio but I dont understand how work, please help me

any idea ?

_inherit = 'sale.order.line'

e_saller = fields.Many2one('product.supplierinfo',
                             string="saller")

["product_id ,=, product_tmpl_id"]