Error when generating raw data for the json output when processing geometries

[vdeparday]

Traceback (most recent call last):
File "/Users/viv/.virtualenvs/geonode/lib/python2.7/site-packages/django/core/handlers/base.py", line 111, in get_response
response = callback(request, _callback_args, *_callback_kwargs)
File "/Users/viv/.virtualenvs/geonode/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 77, in wrapped_view
return view_func(_args, *_kwargs)
File "/Users/viv/dev/safe-geonode/safe_geonode/views.py", line 227, in calculate
geometry.append(item.tolist())
AttributeError: Polygon instance has no attribute 'tolist'
Internal Server Error: /safe/api/v1/calculate/