Product adds to line when field changes

Question

I have button that makes field "urgent" true. So when i push that button i need that product "services" would be added to sale.order.line. Tried to make it this way but with no luck.

class SaleOrder(models.Model):
    _inherit = "sale.order"

    urgent = fields.Boolean('Urgent')

    @api.multi
    def urgent_activate(self):
        self.urgent = True

    @api.onchange('urgent')
    def urgent_onchange(self):
        if self.urgent:
            vals = {
                'name': 'test',
                'product_id': 1
            }
        self.order_line.write(vals)

Answer 1

You can try with following code:

@api.multi
def urgent_activate(self):
    self.urgent = True
    vals = {
        'name': 'test',
        'product_id': 1,
        'order_id':self.id
    }
    self.order_line.create(vals)

About your comment... maybe something like this

@api.multi
def urgent_activate(self):
    self.urgent = True

    for order_line in self.order_line:
        if order_line.name == 'Services':               
            vals = {
                'name': 'test',
                'product_id': 1,
                'order_id':self.id
            }
            self.order_line.write(order_line.id,vals)   

I dont test this second part, let me know if works