GeoDjango: 'Save As' on spatial record (OSMGeoAdmin) creates broken copy *AND* corrupts the original record

[john@…]

Traceback for original record in Admin after SaveAs failed and created a dud copy:

Environment:

Request Method: GET
Request URL: http://url/admin/geo/borders/136/
Django Version: 1.0.2 final
Python Version: 2.5.2
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.flatpages',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.admin',
 'django.contrib.gis',
 'vovo.geo']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware')


Traceback:
File "/usr/lib/python2.5/site-packages/django/core/handlers/base.py" in get_response
  86.                 response = callback(request, *callback_args, **callback_kwargs)
File "/usr/lib/python2.5/site-packages/django/contrib/admin/sites.py" in root
  157.                 return self.model_page(request, *url.split('/', 2))
File "/usr/lib/python2.5/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  44.         response = view_func(request, *args, **kwargs)
File "/usr/lib/python2.5/site-packages/django/contrib/admin/sites.py" in model_page
  176.         return admin_obj(request, rest_of_url)
File "/usr/lib/python2.5/site-packages/django/contrib/admin/options.py" in __call__
  197.             return self.change_view(request, unquote(url))
File "/usr/lib/python2.5/site-packages/django/db/transaction.py" in _commit_on_success
  238.                 res = func(*args, **kw)
File "/usr/lib/python2.5/site-packages/django/contrib/admin/options.py" in change_view
  590.             form = ModelForm(instance=obj)
File "/usr/lib/python2.5/site-packages/django/forms/models.py" in __init__
  216.             object_data = model_to_dict(instance, opts.fields, opts.exclude)
File "/usr/lib/python2.5/site-packages/django/forms/models.py" in model_to_dict
  138.             data[f.name] = f.value_from_object(instance)
File "/usr/lib/python2.5/site-packages/django/db/models/fields/__init__.py" in value_from_object
  332.         return getattr(obj, self.attname)
File "/usr/lib/python2.5/site-packages/django/contrib/gis/db/models/proxy.py" in __get__
  36.             geom = self._klass(geom_value)
File "/usr/lib/python2.5/site-packages/django/contrib/gis/geos/base.py" in __init__
  66.                 g = from_hex(geo_input, len(geo_input))
File "/usr/lib/python2.5/site-packages/django/contrib/gis/geos/prototypes/errcheck.py" in check_geom
  32.         raise GEOSException('Error encountered checking Geometry returned from GEOS C function "%s".' % func.__name__)

Exception Type: GEOSException at /admin/geo/borders/136/
Exception Value: Error encountered checking Geometry returned from GEOS C function "GEOSGeomFromHEX_buf".

---

The copy suffered much the same problem.

If I've not missed anything substantial (which is quite an If, honestly) I'd call something that causes data loss to be Critical.

[springmeyer]

John,

This is most likely an installation problem with proj4. Please make sure you have installed proj4 correctly (from source), including the datum files. For more information see ​http://geodjango.org/docs/install.html#proj-4

Also see ticket #9295 for work on provided a better error message.

Another solution is to not use the OSMGeoAdmin and rather switch to using the GeoAdmin.