如何将多对一字段集成到django表单中

from django.db import models

class ModelA(models.Model):
    # 模型A的字段

class ModelB(models.Model):
    model_a = models.ForeignKey(ModelA, on_delete=models.CASCADE)
    # 模型B的字段

from django import forms
from .models import ModelA, ModelB

class MyForm(forms.Form):
    model_a = forms.ModelChoiceField(queryset=ModelA.objects.all())
    # 其他表单字段

from django.shortcuts import render
from .forms import MyForm

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

<form method="post">
  {% csrf_token %}
  {{ form.as_p }}
  <input type="submit" value="Submit">
</form>