#30758: Postgres DateTimeRangeField crash in django admin (AttributeError:
'builtin_function_or_method' object has no attribute 'strip')
-------------------------------------+-------------------------------------
Reporter: yeppus | Owner: (none)
Type: Bug | Status: new
Component: | Version: 2.2
contrib.postgres |
Severity: Normal | Keywords: DateTimeRangeField
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
When trying to save an object that has a DateTimeRangeField in django
admin the following error occurs:
AttributeError: 'builtin_function_or_method' object has no attribute
'strip'
When trying to determine if the value has changed it, maybe accidentally,
assigns initial value the function "lower" instead of the value.
Later it tries to run .strip() on the function.
This all worked in django 1.11 and I can not find any mentioned of changed
behaviour for Django 2.2.
**django/contrib/postgres/forms/ranges.py: 101**
{{{
#!div style="font-size: 80%"
Code highlighting:
{{{#!python
class RangeWidget(MultiWidget):
def __init__(self, base_widget, attrs=None):
widgets = (base_widget, base_widget)
super().__init__(widgets, attrs)
def decompress(self, value):
if value:
return (value.lower, value.upper) ### <<-- RETURNS CALLABLE,
NOT VALUE
return (None, None)
}}}
}}}
**django/forms/fields.py: 1060**
{{{
#!div style="font-size: 80%"
Code highlighting:
{{{#!python
def has_changed(self, initial, data):
if self.disabled:
return False
if initial is None:
initial = ['' for x in range(0, len(data))]
else:
if not isinstance(initial, list):
initial = self.widget.decompress(initial) ### <<--
RECEIVES CALLABLE, NOT VALUE
for field, initial, data in zip(self.fields, initial, data):
try:
initial = field.to_python(initial) ### <<-- TRIES
to_python with CALLABLE
except ValidationError:
return True
if field.has_changed(initial, data):
return True
return False
}}}
}}}
**django/forms/fields.py: 450**
{{{
#!div style="font-size: 80%"
Code highlighting:
{{{#!python
def to_python(self, value):
"""
Validate that the input can be converted to a datetime. Return a
Python datetime.datetime object.
"""
if value in self.empty_values:
return None
if isinstance(value, datetime.datetime):
return from_current_timezone(value)
if isinstance(value, datetime.date):
result = datetime.datetime(value.year, value.month, value.day)
return from_current_timezone(result)
result = super().to_python(value) ### <<-- ENDS UP HERE SENDING
CALLABLE TO PARENT
return from_current_timezone(result)
}}}
}}}
BaseTemporalField.to_python expects a string and runs .strip() which
generates AttributeError and crashes.
Traceback (most recent call last):
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/core/handlers/exception.py", line 34, in inner
response = get_response(request)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/core/handlers/base.py", line 115, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/core/handlers/base.py", line 113, in _get_response
response = wrapped_callback(request, *callback_args,
**callback_kwargs)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/contrib/admin/options.py", line 606, in wrapper
return self.admin_site.admin_view(view)(*args, **kwargs)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/utils/decorators.py", line 142, in _wrapped_view
response = view_func(request, *args, **kwargs)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/views/decorators/cache.py", line 44, in _wrapped_view_func
response = view_func(request, *args, **kwargs)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/contrib/admin/sites.py", line 223, in inner
return view(request, *args, **kwargs)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/contrib/admin/options.py", line 1637, in change_view
return self.changeform_view(request, object_id, form_url,
extra_context)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/utils/decorators.py", line 45, in _wrapper
return bound_method(*args, **kwargs)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/utils/decorators.py", line 142, in _wrapped_view
response = view_func(request, *args, **kwargs)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/contrib/admin/options.py", line 1522, in changeform_view
return self._changeform_view(request, object_id, form_url,
extra_context)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/contrib/admin/options.py", line 1560, in _changeform_view
if all_valid(formsets) and form_validated:
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/forms/formsets.py", line 448, in all_valid
valid &= formset.is_valid()
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/forms/formsets.py", line 301, in is_valid
self.errors
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/forms/formsets.py", line 281, in errors
self.full_clean()
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/forms/formsets.py", line 325, in full_clean
if not form.has_changed() and i >= self.initial_form_count():
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/contrib/admin/options.py", line 2111, in has_changed
return super().has_changed()
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/forms/forms.py", line 434, in has_changed
return bool(self.changed_data)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/utils/functional.py", line 80, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/forms/forms.py", line 456, in changed_data
if field.has_changed(initial_value, data_value):
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/forms/fields.py", line 1070, in has_changed
initial = field.to_python(initial)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/forms/fields.py", line 462, in to_python
result = super().to_python(value)
File "/Users/joakim/.pyenv/versions/3.5.2/lib/python3.5/site-
packages/django/forms/fields.py", line 379, in to_python
value = value.strip()
--
Ticket URL: <https://code.djangoproject.com/ticket/30758>
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