Django 无法覆盖表单字段小部件

我需要在表单中生成基于列的复选框。

# myapp/templates/forms/widgets/custom.html

<div class="row">
  {% for group, options, index in widget.optgroups %}
    {% for option in options %}
      <div class="col-md-3">
        {% include option.template_name with widget=option %}
      </div>
    {% endfor %}
  {% endfor %}
</div>

这是我的表格

    # myapp/forms.py

    class CustomCheckboxSelectMultiple(forms.CheckboxSelectMultiple):
        template_name = 'forms/widgets/custom.html'

    class HomePageContactForm(forms.Form):
        ...
        other fields
        ...
        services = forms.ModelMultipleChoiceField(
            queryset=Service.objects.all(),
            widget=CustomCheckboxSelectMultiple(),
        )

        def __init__(self, *args, **kwargs):
            super().__init__(*args, **kwargs)
            self.helper = FormHelper(self)
            self.helper.form_show_labels = False

我在 INSTALLED_APPS 列表中添加了“django.forms”，但表单呈现默认的 CheckboxSelectMultiple 模板。

我也读过这个文档https://docs.djangoproject.com/en/3.0/ref/forms/renderers/#overriding-built-in-widget-templates https://docs.djangoproject.com/en/3.0/ref/forms/renderers/#overriding-built-in-widget-templates并尝试将我的模板放入 myapp/templates/django/forms/widgets/checkbox_select.html，但没有运气，再次渲染默认模板。为了调试，我设置了 template_name='template_which_not_exist'，但仍然没有错误并渲染默认模板。请帮我

1. Add 'django.forms'给你的INSTALLED_APPS.

2. Add FORM_RENDERER = 'django.forms.renderers.TemplatesSetting'给你的settings.py.