Django，一个页面上有两个表单，一个表单使用另一个表单中的数据

# forms.py
from django import forms

class FirstForm(forms.Form):
    first_name = forms.CharField(label='First Name')

class SecondForm(forms.Form):
    last_name = forms.CharField(label='Last Name')

# views.py
from django.shortcuts import render
from .forms import FirstForm, SecondForm

def my_view(request):
    if request.method == 'POST':
        first_form = FirstForm(request.POST)
        second_form = SecondForm(request.POST, initial={'last_name': first_form.data.get('first_name')})
        if first_form.is_valid() and second_form.is_valid():
            # 处理表单提交逻辑
            first_name = first_form.cleaned_data['first_name']
            last_name = second_form.cleaned_data['last_name']
            # 执行相应的操作，如保存数据到数据库
    else:
        first_form = FirstForm()
        second_form = SecondForm(initial={'last_name': first_form.data.get('first_name')})
    
    return render(request, 'my_template.html', {'first_form': first_form, 'second_form': second_form})

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