I tried the sugested methods prior to posting because I came across a post 
which had that solution in it. It doesn't throw the error, but ignores it 
totally.
I think the issue is because the url of the form is 
App/default/product/
And the edit function creates a url like
App/default/product/edit/(record id)?(hmac)

I'm not quite sure how to get the diagnostic print/logs.
I'm kind of new to w2p and py in general

Thanks for the replies so far

Sent from my phone

On 4 dec. 2013, at 00:38, Dave S <[email protected]> wrote:

> 
> 
> On Tuesday, December 3, 2013 3:25:06 PM UTC-8, 黄祥 wrote:
>> 
>> please try not tested :
>> edit_in_form = 'edit' in request.args
>> db.product.price.writable = not edit_in_form 
>> 
>> or
>> 
>> edit_in_form = request.args[-3] == 'edit'
>> db.product.price.writable = not edit_in_form 
> 
> I'd expect the 2nd suggestion to be problematic in the same way as the OP's 
> formulation, if request.args doesn't have the expected len.
> maybe a diagnostic print/log to examine the size?
> 
> /dps
>  
> 
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