Hi Sitfan,

I wasn't sure if I could use show_if because I want to evaluate a value 
IS_IN_SET(['choice_a','choice_b')

I'd like to show a file upload field if choice_a is selected and a text 
field if choice_b is selected. 

On Wednesday, January 18, 2017 at 2:23:44 AM UTC-5, 黄祥 wrote:
>
> had you tried conditional fields show_if?
> ref:
>
> http://web2py.com/books/default/chapter/29/07/forms-and-validators#Conditional-fields
>
> best regards,
> stifan
>

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