Hi,

Use default_ context or pass the ID manually:

Access the One2many line's id directly in the form view:

When a record is opened in its form view , the record is passed by its own id , so you can access self.id directly in Python code (in the model or a form method).

@api.model

def some_method(self):

    _logger.info("This record ID: %s", self.id ) 

So in any method (eg, @api.onchange , @api.model , etc.) within the child model , self.id is the correct ID of the record being edited or viewed.

i hope it is use full