Django自动完成指示灯在python 2.7.6下不工作

我的开发环境运行的是Python2.7.1，生产环境运行的是2.7.6

下面的代码在开发过程中运行良好，但在生产过程中不会触发new_city字段的自动完成：

Admin.py

class LocationAdminForm(autocomplete_light.ModelForm):

    class Media:
        js = ('dependant_autocomplete.js',)


    class Meta:
        model = Location
        fields = ['name', 'instagram_id', 'country', 'new_country', 'city', 'new_city']


class LocationAdmin(admin.ModelAdmin):
    list_display = ['name', 'country', 'city', 'new_country', 'new_city']
    search_fields = ['name', 'new_country', 'new_city']
    list_editable = []
    list_filter = ['new_city', 'new_country']

    form = LocationAdminForm

class AutocompleteCity(autocomplete_light.AutocompleteModelBase):
    autocomplete_js_attributes={'placeholder': 'city name ..'}

    def choices_for_request(self):
        q = self.request.GET.get('q', '')
        country_id = self.request.GET.get('country_id', None)

        choices = self.choices.all()
        if q:
            choices = choices.filter(name__icontains=q)
        if country_id:
            choices = choices.filter(country_id=country_id, name__icontains=q)

        return self.order_choices(choices)[0:self.limit_choices]

autocomplete_light.register(Location, AutocompleteCity)

autocomplete_light.register(City, search_fields=('name'),
    autocomplete_js_attributes={'placeholder': 'city name ..'})

自动完成注册表.py

class LocationAdminForm(autocomplete_light.ModelForm):

    class Media:
        js = ('dependant_autocomplete.js',)


    class Meta:
        model = Location
        fields = ['name', 'instagram_id', 'country', 'new_country', 'city', 'new_city']


class LocationAdmin(admin.ModelAdmin):
    list_display = ['name', 'country', 'city', 'new_country', 'new_city']
    search_fields = ['name', 'new_country', 'new_city']
    list_editable = []
    list_filter = ['new_city', 'new_country']

    form = LocationAdminForm

class AutocompleteCity(autocomplete_light.AutocompleteModelBase):
    autocomplete_js_attributes={'placeholder': 'city name ..'}

    def choices_for_request(self):
        q = self.request.GET.get('q', '')
        country_id = self.request.GET.get('country_id', None)

        choices = self.choices.all()
        if q:
            choices = choices.filter(name__icontains=q)
        if country_id:
            choices = choices.filter(country_id=country_id, name__icontains=q)

        return self.order_choices(choices)[0:self.limit_choices]

autocomplete_light.register(Location, AutocompleteCity)

autocomplete_light.register(City, search_fields=('name'),
    autocomplete_js_attributes={'placeholder': 'city name ..'})

---

你知道这可能是什么原因吗？或者我如何排除故障？

查看自动完成light文档后，我在LocationAdminForm中缺少以下内容：

        widgets = autocomplete_light.get_widgets_dict(Location)