How to "lock" task at a certain stage.

Question

Is it possible to "lock" a task when it gets to a certain stage so it can't be moved or data edited?
Normally I do this with a bool field that I set to true and then check it at the beginning of the write method and when it's TRUE it just raises a validation that the record cannot be changed. But when I try this approach on the task it doesn't work because moving a task in kanban triggers the write method 2 times, first it writes the new stage_id and second it writes a sequence.
So is there a wa

Samo Arko · Accepted Answer

This just can't be done with the write method. Had to disable moving  the task to certain stages with the @api.constrain('stage_id'). And allow to move to them only with a button. The button then executes a query.
self.env.cr.execute('UPDATE project_task '
'SET stage_id = %(stage_id)s, locked = TRUE, write_date = %(write_date)s '
'WHERE id IN %(task_id)s ', ({'stage_id': stage_id, 'task_id': tuple(task_ids), 'write_date': write_timestamp})) After that I just check the locked field in the write m

HI · Answer

at what level in developer mode we will enter the code

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