Wagtail:如何将模型实例传递给小部件并在模板中访问它

from django.db import models
from wagtail.core.models import Page

class MyModel(Page):
    title = models.CharField(max_length=255)
    content = models.TextField()

from django.shortcuts import render
from .models import MyModel

def my_view(request):
    my_instance = MyModel.objects.first()
    return render(request, 'my_template.html', {'my_instance': my_instance})

{% load wagtailcore_tags %}
<h1>{{ my_instance.title }}</h1>
<p>{{ my_instance.content }}</p>