脆皮FormHelper包装在Div

Question

尝试用添加了类的div包裹我的名字和姓氏字段。

表单帮助程序本身正在工作，因为'id-exampleForm'和'blueforms'已添加到表单div中，但不会在两个字段周围生成自定义div。

# Customize Crispy forms
from crispy_forms.helper import FormHelper
from crispy_forms.layout import Layout, Fieldset, ButtonHolder, Submit, HTML, Field, Div
from django.utils.safestring import mark_safe
from crispy_forms.bootstrap import (
    PrependedText, PrependedAppendedText, FormActions)

class ReservationForm(forms.Form):
    first_name = forms.CharField(label='First Name', required=True)
    last_name = forms.CharField(label='Last Name', required=True)
    email = forms.EmailField(required=True)

    def __init__(self, *args, **kwargs):
        super(ReservationForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_id = 'id-exampleForm'
        self.helper.form_class = 'blueForms'
        self.helper.layout = Layout(
            #Div('first_name', style="background: white;", title="Explication title", css_class="bigdivs")
            Field(
                Div(
                'first_name',
                'last_name',
                css_id = 'special-fields',
                style="background: white;",
                css_class="bigdivs"
        ),
    )