[英]Wagtail ModelAdmin with list_filter error: FieldDoesNotExist: Region has no field named 'p'
I've got a model I'm exposing through Wagtail's modeladmin
that works until I try to apply a list_filter
including a ForeignKey. 我有一个通过modeladmin
的modeladmin
公开的模型,该模型在尝试应用包括ForeignKey的modeladmin
之前一直list_filter
。 I've got a self-referencing model (to store Counties, Cities, and Towns) called Region that I'd like to be able to create a filter on by the Parent
level. 我有一个名为Region的自引用模型(用于存储县,市和镇),我希望能够在Parent
级上创建过滤器。
I'm running Wagtail 1.8.1 on Django 1.10. 我在Django 1.10上运行Wagtail 1.8.1。 Here's the model: 这是模型:
class Region(models.Model):
"""
Tree of regions and sub-regions.
"""
name = models.CharField(max_length=255)
parent = models.ForeignKey(
'Region',
blank=True,
null=True,
)
class Meta:
unique_together = ('name', 'parent')
def __str__(self):
return '{0}'.format(
self.name,
)
And the ModelAdmin
from wagtail_hooks.py
: 和ModelAdmin
从wagtail_hooks.py
:
class RegionAdmin(ModelAdmin):
model = Region
menu_icon = 'doc-full-inverse'
empty_value_display = 'ROOT'
list_display = ('parent', 'name')
list_filter = ('parent')
modeladmin_register(RegionAdmin)
It works fine if I comment out the list_filter
line in the class RegionAdmin
. 如果我在类RegionAdmin
list_filter
行,它会RegionAdmin
。 The documentation says it can take a ForeignKey
in the list. 该文档说它可以在列表中包含一个ForeignKey
。 Am I missing something obvious? 我是否缺少明显的东西? Stack trace is here: 堆栈跟踪在这里:
Traceback (most recent call last):
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/django/core/handlers/exception.py", line 39, in inner
response = get_response(request)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/django/core/handlers/base.py", line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/django/core/handlers/base.py", line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/django/views/decorators/cache.py", line 43, in _cache_controlled
response = viewfunc(request, *args, **kw)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/wagtail/wagtailadmin/decorators.py", line 24, in decorated_view
return view_func(request, *args, **kwargs)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/wagtail/contrib/modeladmin/options.py", line 350, in index_view
return view_class.as_view(**kwargs)(request)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/django/views/generic/base.py", line 68, in view
return self.dispatch(request, *args, **kwargs)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/django/utils/decorators.py", line 67, in _wrapper
return bound_func(*args, **kwargs)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/django/contrib/auth/decorators.py", line 23, in _wrapped_view
return view_func(request, *args, **kwargs)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/django/utils/decorators.py", line 63, in bound_func
return func.__get__(self, type(self))(*args2, **kwargs2)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/wagtail/contrib/modeladmin/views.py", line 249, in dispatch
self.queryset = self.get_queryset(request)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/wagtail/contrib/modeladmin/views.py", line 554, in get_queryset
filters_use_distinct) = self.get_filters(request)
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/wagtail/contrib/modeladmin/views.py", line 381, in get_filters
field_path)[-1]
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/django/contrib/admin/utils.py", line 485, in get_fields_from_path
fields.append(parent._meta.get_field(piece))
File "/home/vagrant/.virtualenvs/sepia/lib/python3.5/site-packages/django/db/models/options.py", line 619, in get_field
raise FieldDoesNotExist('%s has no field named %r' % (self.object_name, field_name))
django.core.exceptions.FieldDoesNotExist: Region has no field named 'p'
Thanks for any help or ideas! 感谢您的帮助或想法!
You are missing a comma: 您缺少逗号:
list_filter = ('parent',)
Without the comma, the parentheses are ignored and django will be iterating the string, and not a tuple (because there is no tuple!), hence the attempt to access field p
. 没有逗号,括号将被忽略,并且django将迭代字符串,而不是元组(因为没有元组!),因此尝试访问字段p
。
a tuple with one item is constructed by following a value with a comma (it is not sufficient to enclose a single value in parentheses). 一个带有一个项目的元组是通过在值后面加上逗号来构造的(仅将一个值括在括号中是不够的)。 Ugly, but effective. 难看,但是有效。
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