v16: why Odoo raise this error - compute to get Length

Question

i am adding a field to compute length of field complete_name in *product.category* as below:
*Name*: x_complete_name_length
*Type*: Integer
*Stored*: True (Checked)
*Readonly*: True (Checked)
in ADVANCED PROPERTIES :
*Dependencies*: complete_name
*Compute*:
def get_length(self):
if self.complete_name:
self.x_complete_name_length=len(self.complete_name)
when trying to Save by pressing *small button on top*, it is throwing error:
*raise ValueError("forbidden opcode(s) in %r: %s" % (expr, ', '.join

SmithJohn45 · Accepted Answer

i have managed as below:
added custom field in product.category
Name: x_parent_path_length
Type: Integer

created *Automated Action* as below:
Name: update parent path length
Model: Product Category (product.category)
Action to Do: Execute Python Code
Trigger: On Creation & Update

* Python Code *:
if record.parent_path:
parent_length = len(record.parent_path)
# raise Warning(parent_length)
record.write({'x_parent_path_length': parent_length})
all done, now it is calculating length of field pare

shubham shiroya · Answer

follow this way:
from odoo import fields, models

class ProductCategory(models.Model):
_inherit = 'product.category'

x_complete_name_length = fields.Integer(string="Complete Name Length", compute='_compute_complete_name_length', store=True, readonly=True)

def _compute_complete_name_length(self):
for category in self:
if category.complete_name:
category.x_complete_name_length = len(category.complete_name)
else:
category.x_complete_name_length = 0
The error you're encountering, "forbidden opcode

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