Conditional validation

[Andrea Fae']

Hello guys, I need to have a dependent field in a table.

If the field "is_active" = True then I cannot insert in the field "date" nothing.

If the field "is_atvie" = False then I can or not insert something in the field "date".

How to do in the definition of table? Or it's better to use "onvalidation" function?

Thanks

[Andrea Fae']

Where can I find conditional validation documentation?

[Anthony]

You can handle validation involving multiple fields via onvalidation. You can also conditionally specify whether the field is writable based on request.post_vars.

Field('mydate', 'date', requires=IS_EMPTY_OR(IS_DATE()),
      writable=request.post_vars.is_active == True)

In the UI, you can also conditionally hide the date field (though you should still handle the validation/writable status on the server) -- see http://web2py.com/books/default/chapter/29/07/forms-and-validators#Conditional-fields.

Anthony