如何将数据从一个模型添加到另一个django？

# models.py
from django.db import models

class ModelA(models.Model):
    name = models.CharField(max_length=100)

class ModelB(models.Model):
    model_a = models.ForeignKey(ModelA, on_delete=models.CASCADE)
    data = models.CharField(max_length=100)

# forms.py
from django import forms

class ModelBForm(forms.Form):
    model_a = forms.ModelChoiceField(queryset=ModelA.objects.all())
    data = forms.CharField(max_length=100)

# views.py
from django.shortcuts import render, redirect
from .forms import ModelBForm
from .models import ModelB

def add_model_b(request):
    if request.method == 'POST':
        form = ModelBForm(request.POST)
        if form.is_valid():
            model_a = form.cleaned_data['model_a']
            data = form.cleaned_data['data']
            ModelB.objects.create(model_a=model_a, data=data)
            return redirect('success')
    else:
        form = ModelBForm()
    return render(request, 'add_model_b.html', {'form': form})

# add_model_b.html (template)
<form method="post">
  {% csrf_token %}
  {{ form.as_p }}
  <button type="submit">Add Model B</button>
</form>