django admin 筛选器：自定义筛选范围

class NumberRangeFilterForm(Form):
    def __init__(self, *args, **kwargs):
        self.field_name = kwargs.pop('field_name')
        super(NumberRangeFilterForm, self).__init__(*args, **kwargs)
        self.fields['%s__gte' % self.field_name] = DecimalField()
        self.fields['%s__lte' % self.field_name] = DecimalField()


class NumberRangeFilter(admin.filters.FieldListFilter):
    template = 'admin/NumberRangeFilter.html'

    def __init__(self, *args, **kwargs):
        field_path = kwargs['field_path']
        self.lookup_kwarg_since = '%s__gte' % field_path
        self.lookup_kwarg_upto = '%s__lte' % field_path
        super(NumberRangeFilter, self).__init__(*args, **kwargs)
        self.form = NumberRangeFilterForm(data=self.used_parameters, field_name=field_path)

    def expected_parameters(self):
        return [self.lookup_kwarg_since, self.lookup_kwarg_upto]

    # no predefined choices
    def choices(self, cl):
        return []

    def queryset(self, request, queryset):
        if self.form.is_valid():
            filter_params = {
                p: self.form.cleaned_data.get(p) for p in self.expected_parameters()
                if self.form.cleaned_data.get(p) is not None
            }
            return queryset.filter(**filter_params)
        else:
            return queryset

自定义模板 template = 'admin/NumberRangeFilter.html'

{% load i18n %}
HK$
—
HK$

结果示例：