I think I understand; seems like something that should be documented, as 
well as able to be disabled.

On Wednesday, September 21, 2016 at 12:37:52 PM UTC-4, Anthony wrote:
> On Wednesday, September 21, 2016 at 9:36:14 AM UTC-4, Scott Hunter wrote:
>> Here's a simple controller using an SQLFORM.grid w/ selectable:
>>     def open_requests():
>>         print 'Req: %r' % request.vars
>>         query = ...
>>         form = SQLFORM.grid(query, csv=False, details=False, deletable=
>> False, editable=False, searchable=False, create=False,
>>             selectable = lambda ids : None)
>>         return locals()
>> This, as expected, puts a checkbox on each row.  If I select two rows and 
>> hit Submit, I get the following printed from the server:
>> Req: <Storage {'records': ['142', '196'], '_formkey': 
>> '0720df2b-6449-43c8-a6b7-6c89dfdebcd3', '_signature': 
>> 'cbc73b5fbdc8e5961830efbe3f672f35a41d6771', '_formname': 'web2py_grid'}>
>> Req: <Storage {'_signature': 'cbc73b5fbdc8e5961830efbe3f672f35a41d6771'}>
>> The section of the online book about this says the lambda in the 
>> selectable should be a redirect; when it was, I still got 2 requests, but 
>> the second had an added var w/ the selected IDs.
> The book doesn't say the callback should do a redirect -- that's just an 
> example. In any case, if your callback doesn't do a redirect, then the grid 
> code itself will do a redirect back to the original URL. This is by design 
> (maybe so reloading the page or leaving and returning don't trigger a 
> browser warning and subsequent re-posting of the selected rows).
> Anthony

- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
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