Django -收到错误时表单不在HTML中显示

class MyForm(forms.Form):
    name = forms.CharField(label='Name', max_length=100)
    email = forms.EmailField(label='Email')

def my_view(request):
    if request.method == 'POST':
        form = MyForm(request.POST)
        if form.is_valid():
            # 处理有效的表单数据
            return HttpResponseRedirect('/success/')
    else:
        form = MyForm()
    return render(request, 'my_template.html', {'form': form})

<form method="post" action="{% url 'my_view' %}">
  {% csrf_token %}
  {{ form.as_p }}
  <button type="submit">Submit</button>
</form>