Django表单:隐藏字段中的外键

from django.db import models

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

class Profile(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    bio = models.TextField()

from django import forms
from .models import Profile

class ProfileForm(forms.ModelForm):
    user = forms.ModelChoiceField(
        queryset=User.objects.all(),
        widget=forms.HiddenInput()
    )

    class Meta:
        model = Profile
        fields = ['user', 'bio']

from django.shortcuts import render
from .forms import ProfileForm

def create_profile(request):
    if request.method == 'POST':
        form = ProfileForm(request.POST)
        if form.is_valid():
            # 设置外键字段的值
            form.instance.user = request.user
            # 保存表单
            form.save()
            return redirect('success')
    else:
        form = ProfileForm()
    return render(request, 'create_profile.html', {'form': form})