I have a form and a notebook tree , not save the form with the empty line of notebook.
in that notebook must a field
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Hi,
You can achieve it using python constrains. See more about constrains here: https://www.youtube.com/watch?v=50cecNF3OyQ
In your case, you can add a constrain as follows in your main model:
@api.constrains('line_ids')
def _check_lines(self):
for record in self:
if not record.line_ids:
raise ValidationError(_("Warning Message!."))
Update line_ids with your o2m field name and validation message as per your use case.
Thanks
