Hello Odoo Community,

I am working on Odoo 17 Online with Studio I am trying to calculate a field in the project.project model, which should sum the values of a field x_studio_valore_investimento in a x_beni_4_0_e_5_0 model (representing the assets associated with the project). Each asset is linked to the project via a relational field x_studio_progetto.

However, when I try to calculate this field using a computed field and a Python function, I get the following error:

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ValueError: forbidden opcode(s) in 'class Project(models.Model): ...'

The error seems to be caused by the fact that the Python code contains a class definition within the context of the field calculation, which is not allowed. I have tried several approaches, but none seem to resolve the issue.

Details of my code:

I have defined the computed field in the project.project model as follows:

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class Project(models.Model):
    _inherit = 'project.project'

    x_studio_valore_stimato_investimento = fields.Float(
        string="Estimated Investment Value", compute="_compute_valore_stimato_investimento", store=True
    )

    @api.depends('x_studio_one2many_field_8v9_1iff9798r')  # Depends on the relational field Many2one
    def _compute_valore_stimato_investimento(self):
        for record in self:
            assets = self.env['x_beni_4_0_e_5_0'].search([('x_studio_progetto', '=', record.id)])
            total_investment = sum(assets.mapped('x_studio_valore_investimento'))
            record.x_studio_valore_stimato_investimento = total_investment

However, this code generates the error mentioned above.

What I have tried:

1. I tried modifying the field calculation without redefining the Project class, but it doesn't seem to be sufficient.
2. I reviewed the Odoo documentation and some online resources, but I couldn't find a solution for this specific error.

Questions:

• Is there a way to avoid the "forbidden opcode(s)" error when calculating fields in Odoo?
• How can I sum the values of the assets associated with the project without encountering this error?
• Is it possible to use a One2many relationship in a computed field like in my case?

I hope someone can help me resolve this issue. Thank you in advance for your support!

Additional Information:

• Odoo Version: 17.0
• Project Model: project.project
• Assets Model: x_beni_4_0_e_5_0
• Relational Field in the Assets Model: x_studio_progetto
• Field to Sum in the Assets Model: x_studio_valore_investimento
• Computed Field in the Project Model: x_studio_valore_stimato_investimento