I have a situation where the "set' in IS_IN_SET(set) is dynamic, and
sometimes will be empty in:
form = SQLFORM.factory(
Field("value", type='string', label=field_name, default=value,
requires=IS_IN_SET(set)),
... more fields ...
)
I would expect that if 'set' is empty, this would always fail validation.
However, this one allows saving an empty value.
How could I make it to always fail validation if the set is empty?
Thank you.
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