i usually use

if kwargs.has_key('foo'):
   do stuff...


for this kind of behaviour

and you can simply change around the kwargs dict before passing it on
i.e

def new_post(self,**kw):
  kw['member_id']=Member.get(kw['member_id'])
  ...
  p = Post(**kw)



On Apr 8, 11:07 pm, Ed Valentine <[email protected]> wrote:
> I am using json to return field values from the javascript to the
> controller to write/update the database. If the user does not enter a
> value, the string returned shows a "" . The data field needs a NULL or
> an integer value.
>
> 1. How do I test the kwargs dict and assign the NULL value the kwargs
> before passing it to SQLAlchemy for edit?
>
> 2. How do I test a kwargs dict to see if it contains a specific
> keyword:value pair? I do not want to just assume the dict is correct
> in some cases.
>
> Any suggestions. I thought I had read some of this somewhere but I can
> not find it.
>
> Thanks.

i hope i understood your question properly,
Rotem

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