Attribute 'required' does not work in an o2m field

Question

Hi all,
I want to hide the page of "Measurement Setting" when the field "test_type_id != 5". this setting works. If "test_type_id ==5" I want the user to enter values in "measure_data_ids" (o2m field).
The problem is that "required ="test_type_id ==5" does not do the job. User can save the record with an empty "measure_data_id". Please correct me.
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K Ch Kumar Jagabattula · Accepted Answer

you can add a constraint to check if the o2m is empty. So that if test_type_id==5 and length of o2m is 0, you can raise an error to stop the record in saving.

wwy · Answer

Hi K Ch Kumar,
Thank you very much. your suggestion works.

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