How to compute Purchase Order Line field and show in Purchase Order field

Question

i create a custom field *​*x_line_total *​*in* Purchase order Line *and create another custom field *x_grand_total *for show *sum* of
**x_line_total ** field. How to compute* x_line_total* field into *​
*x_grand_total*
​*field?
*This Code i written on .py file but this is not correct*
class PurchaseOrder(models.Model):
_inherit = "purchase.order"
@api.depends('order_line.*x_line_total*')
def _compute_x_grand_total(self):
for line in order.order_line:
*x_grand_total *+= line*.x_line_total *

*x_g

Sylvain Michel RATSARAFAHATRA · Accepted Answer

Hi!
Change the code like this :
class PurchaseOrder(models.Model):
_inherit = "purchase.order"
x_grand_total = fields.Float(compute='_compute_x_grand_total', string='Grand Total')
@api.depends('order_line')
def _compute_x_grand_total(self):
self.x_grand_total = sum(line.x_line_total for line in self.order_line) Best regards!

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