我在 models.py
中有这些类别class Parent(models.Model):
title = models.CharField()
class Child(models.Model):
title = models.CharField()
parent = models.ForeignKey(Parent)
class Address(models.Model)
title = models.CharField()
parent = models.ForeignKey(Parent)
child = models.ManyToManyField(Child)
因为我想要"地址"模型中的"儿童"字段仅显示与"父"相关的"儿童"对象,所以我将此代码写入我的 forms.py
class AddressForm(forms.ModelForm):
class Meta:
model = Address
fields = ('title', 'parent', 'child')
def __init__(self, parent_id, *args, **kwargs):
super(AddressForm, self).__init__(*args, **kwargs)
self.fields['child'].queryset = Child.objects.filter(parent__id=parent_id)
views.py
def address(request, parent_id):
parent = get_object_or_404(Parent, id=parent_id)
if request.method == 'POST':
form = AddressForm(request.POST, parent_id)
if form.is_valid():
address = form.save(commit=False)
address.parent = parent
address.save()
return redirect('app:address_added')
else:
form = AddressForm(parent_id)
template = "add_address.html"
context = {'form': form}
return render(request, template, context)
结果:儿童字段仅显示与所请求的父对象有关的子对象。我想要什么。
问题:当我提交时,我会收到此错误:
attributeError at/manage/add_address/'str'对象没有属性 '获取'
追溯:
文件 "/library/frameworks/python.framework/3.5/lib/python3.5/site-packages/django/core/core/handlers/exception.py" 在内部 39.响应= get_response(请求)
文件 "/library/frameworks/python.framework/3.5/lib/python3.5/site-packages/django/core/core/bandlers/base.py.py" 在_get_response中 187.响应= self.process_exception_by_middleware(E,请求)
文件 "/library/frameworks/python.framework/3.5/lib/python3.5/site-packages/django/core/core/bandlers/base.py.py" 在_get_response中 185.响应= wrapped_callback(请求, *callback_args,** callback_kwargs)
在 add_address 167.如果form.is_valid():文件 "/library/frameworks/python.framework/versions/3.5/lib/python3.5/site-packages/django/forms/forms.py" 在IS_VALID中 169.返回self.is_bound而不是self.errors
文件 "/library/frameworks/python.framework/versions/3.5/lib/python3.5/site-packages/django/forms/forms.py" 错误 161. self.full_clean()
文件 "/library/frameworks/python.framework/versions/3.5/lib/python3.5/site-packages/django/forms/forms.py" 在full_clean中 370. self._clean_fields()
文件 "/library/frameworks/python.framework/versions/3.5/lib/python3.5/site-packages/django/forms/forms.py" 在_clean_fields中 382. value = field.widget.value_from_datadict(self.data,self.files, self.add_prefix(name))
文件 "/library/frameworks/python.framework/3.5/lib/python3.5/site-packages/django/django/forms/widgets.py" 在value_from_datadict中 427. upload = super(clearableFileInput,self).value_from_datadict(数据,文件,名称)
文件 "/library/frameworks/python.framework/3.5/lib/python3.5/site-packages/django/django/forms/widgets.py" 在value_from_datadict中 354.返回files.get(name)
异常类型:attributeError at/manage/add_address/exception 值:'str'对象没有属性'get'
请帮助?
您已将parent_id
成为表格的第一个位置参数,因此您应该在邮局中这样通过:
form = AddressForm(parent_id, request.POST)
请注意,最好不要完全更改表单的签名,而是使用Kwargs:
def __init__(self, *args, **kwargs):
parent_id = kwargs.pop('parent_id', None)
super(AddressForm, self).__init__(*args, **kwargs)
和:
form = AddressForm(request.POST, parent_id=parent_id)
在邮局和
中form = AddressForm(parent_id=parent_id)
在其他中。