Download as a csv crashes sometimes with TypeError

[MikkoJo]

This happens if features properties is empty object and collection also has features with properties.

Cleaned traceback below

TypeError at /admin/geojson_rest/pointfeature/

string indices must be integers

Environment:

Request Method: POST Request URL: https://....../admin/geojson_rest/pointfeature/

Django Version: 1.4.2 Python Version: 2.6.6 Installed Applications: ('django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.admin', 'django.contrib.gis', 'base_page', 'dashboard', 'maps', 'auth_page', 'plan_proposals', 'geonition_client', 'gntauth', 'gntimages', 'geojson_rest', 'geonition_utils', 'geoforms', 'manage_release', 'statics', 'modeltranslation') Installed Middleware: ('django.middleware.gzip.GZipMiddleware', 'django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.locale.LocaleMiddleware', 'geonition_utils.middleware.PreventCacheMiddleware', 'geonition_utils.middleware.IEEdgeMiddleware')

Traceback: File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/django/core/handlers/base.py" in get_response

1. response = callback(request, _callback_args, *_callback_kwargs) File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/django/contrib/admin/options.py" in wrapper
2. return self.admin_site.admin_view(view)(_args, *_kwargs) File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/django/utils/decorators.py" in _wrapped_view
3. response = view_func(request, _args, *_kwargs) File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
4. response = view_func(request, _args, *_kwargs) File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/django/contrib/admin/sites.py" in inner
5. return view(request, _args, *_kwargs) File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/django/utils/decorators.py" in _wrapper
6. return bound_func(_args, *_kwargs) File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/django/utils/decorators.py" in _wrapped_view
7. response = view_func(request, _args, *_kwargs) File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/django/utils/decorators.py" in bound_func
8. return func(self, _args2, *_kwargs2) File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/django/contrib/admin/options.py" in changelist_view
9. response = self.response_action(request, queryset=cl.get_query_set(request)) File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/django/contrib/admin/options.py" in response_action
10. response = func(self, request, queryset) File "/l/apps/softgis/geonition28.env/lib/python2.6/site-packages/geojson_rest/actions.py" in download_csv
11. value = value[part_selector]

Exception Type: TypeError at /admin/geojson_rest/pointfeature/ Exception Value: string indices must be integers

split_selector: ['properties', 'time', 'expire_time']

obj:    <PointFeature: 13 PP-perhela-perhelan-kortteli T1332262399.441142R0.258137>
value:  u''
selector:  'properties.time.expire_time'
dict_json:
                {'geometry': {'coordinates': [394857.40191000002, 6704267.5516990004],
                                      'type': 'Point'},
                'group': u'PP-perhela-perhelan-kortteli',
                'id': 62,
                'private': True,
                'properties': {},
                'time': {'create_time': '2012-04-27T07:36:46.011000+00:00',
                      'expire_time': ''},
                'type': 'Feature',
                'user': u'T1335269506.077803R0.502147'}

selector_list:  

['group',
 'user',
 'time.expire_time',
 'time.create_time',
 'geometry',
 'type',
 'id',
 'private',
 u'properties.form_values',
 'properties.group',
 u'properties.name',
 'properties.time.expire_time',
 'properties.time.create_time',
 'properties.id',
 'properties.user']

values:     

['PP-perhela-perhelan-kortteli',
 'T1335269506.077803R0.502147',
 '',
 '2012-04-27T07:36:46.011000+00:00',
 'POINT (394857.4019100000150502 6704267.5516990004107356)',
 'Feature',
 '62',
 'True',
 '',
 '',
 '']

part_selector:   'expire_time'

[ksnabb]

Can you reproduce this one with a test?

[MikkoJo]

Test added.