JSON enconding result of Model.validate()
Hi,
I'm writing a simple ajax form and I'm having trouble JSON-encoding
the result of Model.validate(). I always get an error similar to
"'This field is required.' cannot be JSON-encoded"
To verify the posted data i populate the model I intend to save and
call validate(). If there are any errors I want to JSON-encode them
and send them back to the client, like this:
obj = MyModel(name = request.POST.get('name', False), email =
request.POST.get('name', False))
validation_errors = obj.validate()
if len(validation_errors) > 0:
return HttpResponse(simplejson.dumps(validation_errors),
mimetype="application/javascript")
I've been searching around and I found that the result of
Model.validate() contains some objects of type instance that for some
reason cannot be JSON-encoded.
I find this all very strange, shouldn't the result of validate()
contain string key-pairs? JSON-encoding this should be
straightforward.
Anyone has encountered this problem or could lend me a hand on this?
Thank you!
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Re: JSON enconding result of Model.validate()
Thanks, that solved it!
On Nov 2, 11:30 am, Malcolm Tredinnick <[EMAIL PROTECTED]>
wrote:
> On Fri, 2007-11-02 at 10:02 +, grimborg wrote:
> > Hi,
> > I'm writing a simple ajax form and I'm having trouble JSON-encoding
> > the result of Model.validate(). I always get an error similar to
> > "'This field is required.' cannot be JSON-encoded"
>
> > To verify the posted data i populate the model I intend to save and
> > call validate(). If there are any errors I want to JSON-encode them
> > and send them back to the client, like this:
>
> > obj = MyModel(name = request.POST.get('name', False), email =
> > request.POST.get('name', False))
> > validation_errors = obj.validate()
> > if len(validation_errors) > 0:
> > return HttpResponse(simplejson.dumps(validation_errors),
> > mimetype="application/javascript")
>
> > I've been searching around and I found that the result of
> > Model.validate() contains some objects of type instance that for some
> > reason cannot be JSON-encoded.
>
> > I find this all very strange, shouldn't the result of validate()
> > contain string key-pairs? JSON-encoding this should be
> > straightforward.
>
> No, it contains things that are convertable to unicode() on output, but
> translated into the users language. They are lazy translation objects.
> Call force_unicode() on them to convert them to a real unicode object
> (or smart_str() if you need UTF-8 output).
>
> Regards,
> Malcolm
>
> --
> Depression is merely anger without
> enthusiasm.http://www.pointy-stick.com/blog/
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Re: JSON enconding result of Model.validate()
On Fri, 2007-11-02 at 10:02 +, grimborg wrote:
> Hi,
> I'm writing a simple ajax form and I'm having trouble JSON-encoding
> the result of Model.validate(). I always get an error similar to
> "'This field is required.' cannot be JSON-encoded"
>
> To verify the posted data i populate the model I intend to save and
> call validate(). If there are any errors I want to JSON-encode them
> and send them back to the client, like this:
>
> obj = MyModel(name = request.POST.get('name', False), email =
> request.POST.get('name', False))
> validation_errors = obj.validate()
> if len(validation_errors) > 0:
> return HttpResponse(simplejson.dumps(validation_errors),
> mimetype="application/javascript")
>
> I've been searching around and I found that the result of
> Model.validate() contains some objects of type instance that for some
> reason cannot be JSON-encoded.
>
> I find this all very strange, shouldn't the result of validate()
> contain string key-pairs? JSON-encoding this should be
> straightforward.
No, it contains things that are convertable to unicode() on output, but
translated into the users language. They are lazy translation objects.
Call force_unicode() on them to convert them to a real unicode object
(or smart_str() if you need UTF-8 output).
Regards,
Malcolm
--
Depression is merely anger without enthusiasm.
http://www.pointy-stick.com/blog/
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Re: JSON enconding result of Model.validate()
grimborg napisał(a):
> I'm writing a simple ajax form and I'm having trouble JSON-encoding
> the result of Model.validate(). I always get an error similar to
> "'This field is required.' cannot be JSON-encoded"
>
> To verify the posted data i populate the model I intend to save and
> call validate(). If there are any errors I want to JSON-encode them
> and send them back to the client, like this:
>
> obj = MyModel(name = request.POST.get('name', False), email =
> request.POST.get('name', False))
> validation_errors = obj.validate()
> if len(validation_errors) > 0:
> return HttpResponse(simplejson.dumps(validation_errors),
> mimetype="application/javascript")
>
> I've been searching around and I found that the result of
> Model.validate() contains some objects of type instance that for some
> reason cannot be JSON-encoded.
>
> I find this all very strange, shouldn't the result of validate()
> contain string key-pairs? JSON-encoding this should be
> straightforward.
I suspect it contains lazy translation of error message. Do a unicode()
on it to check.
--
Jarek Zgoda
Skype: jzgoda | GTalk: [EMAIL PROTECTED] | voice: +48228430101
"We read Knuth so you don't have to." (Tim Peters)
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