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How do I correctly create a calculated field to sum two other field values in Odoo Studio (Odoo Online)?

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developmentdebug
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CLOUX Laurent

I'm using the SaaS version. I'm trying to create a relatively simple calculated field using Odoo Studio.

A field called x_studio_value_c should be the sum of x_studio_value_a and x_studio_value_b.

In Odoo Studio, I've confirmed that each field is of type FLOAT, and I've added the following code:


for record in self:

record.x_studio_value_c = record.x_studio_value_a + record.x_studio_value_b


When I modify the value of 'a', I receive the following error:


Traceback (most recent call last):
  File "/home/odoo/src/odoo/19.0/odoo/http.py", line 2266, in _serve_db
    return service_model.retrying(serve_func, env=self.env)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/service/model.py", line 184, in retrying
    result = func()
             ^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/http.py", line 2313, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/http.py", line 2528, in dispatch
    result = self.request.registry['ir.http']._dispatch(endpoint)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/addons/base/models/ir_http.py", line 357, in _dispatch
    result = endpoint(**request.params)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/http.py", line 788, in route_wrapper
    result = endpoint(self, *args, **params_ok)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/addons/web/controllers/dataset.py", line 32, in call_kw
    return call_kw(request.env[model], method, args, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/service/model.py", line 93, in call_kw
    result = method(recs, *args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/addons/web/models/models.py", line 2107, in onchange
    if field_name not in done and snapshot0.has_changed(field_name)
                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/addons/web/models/models.py", line 2219, in has_changed
    return self[field_name] != self.record[field_name]
                               ~~~~~~~~~~~^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/orm/models.py", line 6680, in __getitem__
    return self._fields[key].__get__(self)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/orm/fields.py", line 1660, in __get__
    self.recompute(record)
  File "/home/odoo/src/odoo/19.0/odoo/orm/fields.py", line 1886, in recompute
    apply_except_missing(self.compute_value, recs)
  File "/home/odoo/src/odoo/19.0/odoo/orm/fields.py", line 1856, in apply_except_missing
    func(records)
  File "/home/odoo/src/odoo/19.0/odoo/orm/fields.py", line 1910, in compute_value
    records._compute_field_value(self)
  File "/home/odoo/src/odoo/19.0/addons/mail/models/mail_thread.py", line 476, in _compute_field_value
    return super()._compute_field_value(field)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/orm/models.py", line 4949, in _compute_field_value
    determine(field.compute, self)
  File "/home/odoo/src/odoo/19.0/odoo/orm/fields.py", line 84, in determine
    return needle(records, *args)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/addons/base/models/ir_model.py", line 50, in func
    return safe_eval(text, SAFE_EVAL_BASE | {'self': self}, mode="exec")
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/odoo/src/odoo/19.0/odoo/tools/safe_eval.py", line 394, in safe_eval
    assert_valid_codeobj(_SAFE_OPCODES, c, expr)
  File "/home/odoo/src/odoo/19.0/odoo/tools/safe_eval.py", line 237, in assert_valid_codeobj
    raise ValueError("forbidden opcode(s) in %r: %s" % (expr, ', '.join(opname[x] for x in (code_codes - allowed_codes))))
ValueError: forbidden opcode(s) in 'for record in self:\r\n    record.x_studio_value_c = record.x_studio_value_a + record.x_studio_value_b': STORE_ATTR


Does anyone have any ideas?

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Ray Carnes (ray)

"Compute Field" is not a question. A question is a substantial phrase that ends with "?"

We get close to 1,000 posts a month and not everyone will open a post to find out what your question is.

I have edited your post to make the title a question.

In the future, please consider (1) using a Question that makes it clear what you ask without requiring people to open your post and (2) adding Tags. This will often increase the chances people will respond and also make everything clearer for others who may come along later searching for the same thing.

Failing that, you can paste your future posts into an AI Chatbot and ask it to "please generate a question of no more than 16 words that summarizes what I am asking" and use that as your question.

See also https://www.odoo.com/forum/help-1/meta-why-do-some-questions-get-answers-and-others-do-not-25620

Avatar
Bloopark systems GmbH & Co. KG
Best Answer

HI,

In Odoo Studio, the computed field expression environment is sandboxed, meaning only certain Python operations are allowed.

You cannot use attribute assignment like record.x_studio_value_c = ..., because it triggers the forbidden opcode STORE_ATTR.


Instead, you must use dictionary style assignment and explicitly declare field dependencies.


Here’s the correct code:

for record in self:

record['x_studio_value_c'] = record['x_studio_value_a'] + record['x_studio_value_b']


Hope it helps!

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CLOUX Laurent
Author

Thanks a lot. It works !!

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