JHeasly wrote:
> Hello all,
>
> I'm following the "Serializing Django objects" documentation and have a
> view pretty much verbatim from the docs:
>
> def my_json_view(request):
> data = serializers.serialize("json", Location.objects.all())
> return HttpResponse(data, mimetype='text/javascript')
>
> My Location model includes decimal latitude and longitude data. When I
> test the above view using the Django shell, it works, but when I try it
> via a browser request, I get this:
>
> Decimal("44.048708") is not JSON serializable
> Request Method: GET
> Request URL: http://www.my_url.com/maps/json/
> Exception Type: TypeError
> Exception Value: Decimal("44.048708") is not JSON serializable
> Exception Location:... [snip] ...
> /django/utils/simplejson/encoder.py in default, line 258
>
> Also, the above will works via the browser when I specify "xml" as the
> serialization format. The "json" format just doesn't like my decimals.
> What am I doing wrong?
>
> Thanks for any guidance,
> John
Its just a case that isn't handled in
django.utils.simplejson.encoder.py. I'm not really sure the "right" way
to implement it but you could just change line 176 in _iterencode()
from:
176 elif isinstance(key, float):
177key = floatstr(key, allow_nan)
to
176 elif isinstance(key, float) or isinstance(key,
decimal.Decimal):
177key = floatstr(key, allow_nan)
But I also think JSONEncoder is meant to be subclassed for these types
of cases. I was just surprised to see that things like Decimal and date
weren't handled since these are so common as return types from the
DB-API.
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