I got a database field which needs to be filled when a bolean is true and
when its not true it should be empty.
Thats what I did:
Field('Booleancheck','boolean'),
Field('Type','reference Type_table', requires=IS_IN_DB (db,'type_table.id',
'type_table.Name') if request.vars.Booleancheck else None),
This requires the field to be filled if booleancheck is true but when its
falls it can be filled. is there a IS_EMPTY() validator?
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