Django检查表单选项是否为空

在模板中，如何检查 ModelChoiceField 是否为空？

In a template how is it possible to check if a ModelChoiceField is empty?

这是我的形式：

class BatchForm(forms.ModelForm):
    def __init__(self, user=None, *args, **kwargs):
        super(BatchForm, self).__init__(*args, **kwargs)
        this_templates = Template.objects.for_user(user)
        self.fields["templates"] = forms.ModelChoiceField(queryset=this_templates, required=False, empty_label=None)

然后在我的视图我想要不显示下拉列表，如果查询器是空的这样的...

Then in my views I want to not show the drop down if the queryset is empty something like this...

{% if not form.templates%}
<div class="control-group">
  <div class="controls">
    {{ form.templates }}
  </div>
etc