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By: a guest on Sep 17th, 2011  |  syntax: Python  |  size: 1.20 KB  |  views: 49  |  expires: Never
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  1. Traceback (most recent call last):
  2.   File "/<appengine_dir>/google_appengine/google/appengine/ext/webapp/_webapp25.py", line 703, in __call__
  3.     handler.post(*groups)
  4.   File "/<project_dir>/app/handlers/students.py", line 30, in post
  5.     if (form.is_valid() and upload):
  6.   File "/<appengine_dir>/google_appengine/lib/django_1_2/django/forms/forms.py", line 121, in is_valid
  7.     return self.is_bound and not bool(self.errors)
  8.   File "/<appengine_dir>/google_appengine/lib/django_1_2/django/forms/forms.py", line 112, in _get_errors
  9.     self.full_clean()
  10.   File "/<appengine_dir>/google_appengine/lib/django_1_2/django/forms/forms.py", line 267, in full_clean
  11.     self._clean_fields()
  12.   File "/<appengine_dir>/google_appengine/lib/django_1_2/django/forms/forms.py", line 282, in _clean_fields
  13.     value = field.clean(value, initial)
  14.   File "/<appengine_dir>/google_appengine/google/appengine/ext/db/djangoforms.py", line 780, in clean_for_property_field
  15.     property_clean(prop, value)
  16.   File "/<appengine_dir>/google_appengine/google/appengine/ext/db/djangoforms.py", line 670, in property_clean
  17.     prop.validate(prop.make_value_from_form(value))
  18. AttributeError: 'NoneType' object has no attribute 'validate'
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