在WagTail中呈现具有初始值的窗体

from django import forms

class MyForm(forms.Form):
    name = forms.CharField(label='姓名')
    email = forms.EmailField(label='电子邮件')

from wagtail.core.models import Page
from wagtail.core.fields import StreamField
from wagtail.core import blocks

class MyPage(Page):
    form_data = StreamField([
        ('form', blocks.StructBlock([
            ('name', blocks.CharBlock()),
            ('email', blocks.EmailBlock()),
        ])),
    ])

{% extends "base.html" %}

{% block content %}
  <h1>我的页面</h1>
  {% wagtailuserbar %}

  <form method="post">
    {% csrf_token %}
    {% form form_data.form initial={'name': 'John Doe', 'email': 'johndoe@example.com'} %}
    <button type="submit">提交</button>
  </form>
{% endblock %}