[英]django: How can I create a custom Logging Filter for SuspiciousOperation exception?
[英]Custom Filter in Django Admin returns SuspiciousOperation
我正在尝试实现此代码段的新版本,使其与Django 1.4和1.5兼容
有了一些改进,下面的代码几乎可以正常工作,除了Django返回给我一个SuspiciousOperation错误。 我知道如何破解它,但是我不希望接触Django的核心。 如果您有任何建议,欢迎您:
这是我的过滤器:
class RelatedNullFilterSpec(FieldListFilter):
def __init__(self, field, request, params, model, model_admin, field_path):
field_root, field_name = field_path.rsplit('__', 1)
self.lookup_title = field.verbose_name
self.title = self.lookup_title
self.null_lookup_kwarg = '%s__isnull' % field_root
self.null_lookup_val = request.GET.get(self.null_lookup_kwarg, None)
self.lookup_kwarg = '%s__exact' % (field_path)
self.lookup_val = request.GET.get(self.lookup_kwarg, None)
if isinstance(field, models.fields.BooleanField):
self.lookup_choices = (
# (None, _('All')),
('1', _('Yes')),
('0', _('No')))
else:
self.lookup_choices = field.get_choices(include_blank=False)
super(RelatedNullFilterSpec, self).__init__(field, request, params, model, model_admin, field_path)
def expected_parameters(self):
return [self.lookup_kwarg, self.null_lookup_kwarg]
def choices(self, cl):
yield {'selected': self.lookup_val is None and self.null_lookup_val is None,
'query_string': cl.get_query_string({}, [self.lookup_kwarg,self.null_lookup_kwarg]),
'display': _('All')}
yield {'selected': self.lookup_val is None and self.null_lookup_val=="True",
'query_string': cl.get_query_string({self.null_lookup_kwarg:True},[self.lookup_kwarg]),
'display': _('Null')}
yield {'selected': self.lookup_val is None and self.null_lookup_val=="False",
'query_string': cl.get_query_string({self.null_lookup_kwarg:False},[self.lookup_kwarg]),
'display': _('Not Null')}
for pk_val, val in self.lookup_choices:
yield {'selected': self.lookup_val == smart_unicode(pk_val),
'query_string': cl.get_query_string({self.lookup_kwarg: pk_val},[self.null_lookup_kwarg]),
'display': val}
然后在我的管理员中,我有以下内容:
list_filter = ('time_added', 'time_modified', ('model1__model2__property', RelatedNullFilterSpec),)
而且我总是从Django BaseModelAdmin类的lookup_allowed
方法中得到此错误...
在django.db.models.options中,我可以实现一个hack来覆盖或扩展self.related_fkey_lookups
但是我觉得有点太过分了。
编辑:请注意,以下几乎标准的过滤器也返回相同的错误:( ('venue__eat_venue', BooleanFieldListFilter)
通常,我的目标是希望有一个过滤器,该过滤器允许我根据是否存在与model2相关的字段(Null / Not-Null)和属性值(如果存在与model2相关的字段)对对象进行排序)。 这将非常方便,我认为也不太具体。
最后,是的,当我不为我的model1__model2__property
请求此自定义过滤器时,一切正常:-)
这似乎是Django中的错误,当您为过滤器路径(元组的第一个元素)加上双下划线时...在您的情况下为'model1__model2__property'
注意:现在已在Django 1.7中修复
此处有更多详细信息: https : //code.djangoproject.com/ticket/19182
这是相当难看,但到目前为止,我发现的唯一的解决方法是这样固定和重写的方法粘贴到ModelAdmin
要使用list_filter
:
def lookup_allowed(self, lookup, value):
"""
Copy and pasted from ModelAdmin to fix bug in Django
https://code.djangoproject.com/ticket/19182
"""
from django.db.models.constants import LOOKUP_SEP
from django.db.models.sql.constants import QUERY_TERMS
from django.contrib.admin import FieldListFilter
from django.contrib.admin import widgets
model = self.model
# Check FKey lookups that are allowed, so that popups produced by
# ForeignKeyRawIdWidget, on the basis of ForeignKey.limit_choices_to,
# are allowed to work.
for l in model._meta.related_fkey_lookups:
for k, v in widgets.url_params_from_lookup_dict(l).items():
if k == lookup and v == value:
return True
parts = lookup.split(LOOKUP_SEP)
# Last term in lookup is a query term (__exact, __startswith etc)
# This term can be ignored.
if len(parts) > 1 and parts[-1] in QUERY_TERMS:
parts.pop()
# Special case -- foo__id__exact and foo__id queries are implied
# if foo has been specificially included in the lookup list; so
# drop __id if it is the last part. However, first we need to find
# the pk attribute name.
rel_name = None
for part in parts[:-1]:
try:
field, _, _, _ = model._meta.get_field_by_name(part)
except FieldDoesNotExist:
# Lookups on non-existants fields are ok, since they're ignored
# later.
return True
if hasattr(field, 'rel'):
model = field.rel.to
rel_name = field.rel.get_related_field().name
elif isinstance(field, RelatedObject):
model = field.model
rel_name = model._meta.pk.name
else:
rel_name = None
if rel_name and len(parts) > 1 and parts[-1] == rel_name:
parts.pop()
if len(parts) == 1:
return True
clean_lookup = LOOKUP_SEP.join(parts)
// FIX BEGINS:
valid_lookups = [self.date_hierarchy]
for filter_item in self.list_filter:
if callable(filter_item):
valid_lookups.append(filter_item.parameter_name)
elif isinstance(filter_item, (list, tuple)):
valid_lookups.append(filter_item[0])
else:
valid_lookups.append(filter_item)
return clean_lookup in valid_lookups
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