I'm trying to build a form based on Google Places (geocoding) based on the 
following table:

db.define_table('place',
                Field('address'),
                Field('street_number'),
                Field('route'),
                Field('locality'),
                Field('lat'),
                Field('lng'),
                )

All fields except 'address' are rendered in the form as hidden inputs.

I want my form to be validated if and only if 'lat' and 'lng' are not empty.


If I put a validator like IS_FLOAT_IN_RANGE(), these fields are indeed 
validated but since they are hidden there is no error message displayed.


Is there a way to invalidate 'address' if 'lat' or 'lng' is empty ? If so, 
I could then display an error message attached to the input users actually 
type into.

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