如何创建一个Django表单/表单集，其中的Modelchoice字段具有来自不同查询集的值

from django import forms
from .models import Model1, Model2

class MyForm(forms.Form):
    model1_choices = Model1.objects.all()
    model2_choices = Model2.objects.all()
    
    modelchoice_field = forms.ModelChoiceField(queryset=model1_choices, label='ModelChoiceField1')
    modelchoice_field2 = forms.ModelChoiceField(queryset=model2_choices, label='ModelChoiceField2')
    
    # 其他字段和方法...

from django.shortcuts import render

def my_view(request):
    form = MyForm()
    return render(request, 'my_template.html', {'form': form})

<form method="post">
    {% csrf_token %}
    {{ form.as_p }}
    <button type="submit">提交</button>
</form>