我最近使用Django做网站,我在实现链式下拉/依赖下拉时遇到了困难。我尝试过智能选择,但无法实现它,当我偶然发现django-autocomplete-light时。
我能够实现这个并且它符合我当前的要求,但是,我注意到python正在抛出这个警告:
UnorderedObjectListWarning: Pagination may yield inconsistent results
with an unordered object_list: <class 'project.models.Driver'> QuerySet.
我彻底遵循了django-autocomplete-light中的教程,但我仍然遗漏了一些内容。
forms.py
class TripModelForm(forms.ModelForm):
driver = forms.ModelChoiceField(
queryset=Driver.objects.all(),
widget=autocomplete.ModelSelect2(url='driver_autocomplete',
forward=['hauler'])
)
class Meta:
model = Trip
fields = ['ticket', 'date_issued', 'department', 'hauler', 'plate_number', 'driver',]
urls.py
urlpatterns += [
path('driver-autocomplete/', views.DriverAutocomplete.as_view(), name='driver_autocomplete'),
]
views.py
class DriverAutocomplete(autocomplete.Select2QuerySetView):
def get_queryset(self):
if not self.request.user.is_authenticated():
return Driver.objects.none()
qs = Driver.objects.all()
hauler = self.forwarded.get('hauler', None)
if hauler:
qs = qs.filter(hauler=hauler)
if self.q:
qs = qs.filter(name__istartswith=self.q)
return qs
答案 0 :(得分:1)
我跟着错误来自哪里\ python36 \ lib \ site-packages \ django \ views \ generic \ list.py:88。看起来这个类需要有序的查询集,所以我将views.py修改为:
<强> views.py 强>
class DriverAutocomplete(autocomplete.Select2QuerySetView):
def get_queryset(self):
if not self.request.user.is_authenticated():
return Driver.objects.none()
qs = Driver.objects.all().order_by('name') <-- here
if self.q:
hauler = self.forwarded.get('hauler', None)
if hauler:
qs = qs.filter(hauler=hauler)
if self.q:
qs = qs.filter(name__istartswith=self.q)
return qs
此解决方案对我有用,我可以通过删除查询中的.order_by来复制警告。