[18.0][POC] base_exception: Rollback transaction triggering exception rule #3476
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In case a implementation module, eg sale_exception, breaks a function override, ie does not call super on sale.order.action_confirm in case an exception rule applies, it is still possible that another module that is not in the implementation module's dependency, does modify existing the same object through the same function's override that is called before through MRO. As the exception rule is only written in base_exception module, such modifications would be still be committed although the exception was triggered. The only way to rollback everything that happened is to raise an exception that is going to rollback the transaction. However, we still want to commit the write of the exception rule and not to propagate the exception back to the webclient. Since we cannot alter the env in the retrying function (that handles rollback), we do not have any other choice than to use a dedicated cursor in the dispatching function to process the request, since it could trigger the exception rule, and to use the original env to write the exception rule, and have the webclient being refreshed to display the exception. This might break the latest feature to pop up the wizard, but since this is still a POC, we could fix that afterwards in case this POC is accepted.
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Hi @sebastienbeau, @hparfr, |
SilvioC2C
reviewed
Dec 27, 2025
Comment on lines
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| for rule_id, (model, res_ids) in to_add.items(): | ||
| old_env[model].browse(res_ids).write({"exception_ids": [(4, rule_id)]}) | ||
| for rule_id, (model, res_ids) in to_remove.items(): | ||
| old_env[model].browse(res_ids).write({"exception_ids": [(4, rule_id)]}) |
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Beware:
- in the old behavior, old rules were removed before new ones got added, while in here you do the opposite: is this a wanted change?
- the command value should be
3when removing rules,4when adding them, while in here you're always using4: can you please switch toCommand.[un]link(ID)instead to make it easier to read and debug (and also, possibly add tests)?
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In case a implementation module, eg sale_exception, breaks a function override, ie does not call super on sale.order.action_confirm in case an exception rule applies, it is still possible that another module that is not in the implementation module's dependency, does modify existing the same object through the same function's override that is called before through MRO.
As the exception rule is only written in base_exception module, such modifications would be still be committed although the exception was triggered.
The only way to rollback everything that happened is to raise an exception that is going to rollback the transaction. However, we still want to commit the write of the exception rule and not to propagate the exception back to the webclient.
Since we cannot alter the env in the retrying function (that handles rollback), we do not have any other choice than to use a dedicated cursor in the dispatching function to process the request, since it could trigger the exception rule, and to use the original env to write the exception rule, and have the webclient being refreshed to display the exception.
This might break the latest feature to pop up the wizard, but since this is still a POC, we could fix that afterwards in case this POC is accepted.