django在表单提交后添加外键值

from django.db import models

class ParentModel(models.Model):
    # 父模型字段

class ChildModel(models.Model):
    parent = models.ForeignKey(ParentModel, on_delete=models.CASCADE)
    # 子模型字段

from django.shortcuts import render, redirect
from .forms import YourForm  # 导入你的表单类
from .models import ParentModel, ChildModel

def your_view(request):
    if request.method == 'POST':
        form = YourForm(request.POST)
        if form.is_valid():
            parent = ParentModel.objects.create()  # 创建父模型实例
            child = form.save(commit=False)
            child.parent = parent  # 设置外键值
            child.save()  # 保存子模型实例
            return redirect('success')  # 重定向到成功页面
    else:
        form = YourForm()
    return render(request, 'your_template.html', {'form': form})

from django import forms
from .models import ChildModel

class YourForm(forms.ModelForm):
    class Meta:
        model = ChildModel
        fields = '__all__'