I have calculated 2 fields with my method. it calculates the number of products that are assigned.

class ProductProduct(models.Model):
    _inherit = 'product.product'

    planned_qty_cust = fields.Float(compute='_calculate_planned_qty', string='Planned Qty Customer', )
    planned_qty_supl = fields.Float(compute='_calculate_planned_qty', string='Planned Qty Suplier', )


    @api.multi
    def _calculate_planned_qty(self):
        for product in self:
            stock_move_obj = self.env['stock.move']
            domain = [('product_id', '=', product.id),
                                                 ('state', 'not in', ['cancel', 'done','draft']),
                                                 ('location_dest_id.usage', '=', 'customer'),
                                                 ]
            stock_moves_cust = stock_move_obj.search(domain)
            qty = sum(stock_moves_cust.mapped('product_uom_qty'))
            product.planned_qty_cust = qty
            domain2 = [('product_id', '=', product.id),
                      ('state', 'not in', ['cancel', 'done', 'draft']),
                      ('location_dest_id.usage', '=', 'supplier'),
                      ]
            stock_moves_cust = stock_move_obj.search(domain2)
            qty = sum(stock_moves_cust.mapped('product_uom_qty'))
            product.planned_qty_supl = qty

the thing is that I need to filter on these fields, and probably I need to create search function but it's kinda complicated.

maybe someone can help me with this how this method should look, or maybe there is already a module for this type of calculation?