我是django的新手，正在为考试门户网站进行学生登录。在我看来，我基本上通过了两种形式。一个表单用于获取用户详细信息，第二个表单用于存储学生的详细信息。我已经使用django小部件调整包来加载表单的字段。我的用户被创建了，但同时我仍然收到错误-UNIQUE约束失败：auth_user.username.
这是我的型号.py
class StudentInfo(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
mobile = models.IntegerField(max_length=20, blank=True)
branch = models.CharField(max_length=50, blank=True)
forms.py
class StudentForm(forms.ModelForm)
class Meta():
model = User
fields = ['username', 'email', 'password']
widgets = {
'password': forms.PasswordInput()
}
class StudentInfoForm(forms.ModelForm):
class Meta():
model = StudentInfo
fields = ['mobile','branch']
views.py
def register(request):
userForm= forms.StudentForm()
studentForm=forms.StudentInfoForm()
mydict={'userForm':userForm,'studentForm':studentForm}
if request.method=='POST':
userForm=forms.StudentForm(request.POST)
studentForm=forms.StudentInfoForm(request.POST)
if userForm.is_valid() and studentForm.is_valid():
user=userForm.save()
user.is_active = True
user.set_password(user.password)
messages.success(request,"Student User created Succesfully.")
student=studentForm.save(commit=False)
student.user=user
student.save()
my_student_group = Group.objects.get_or_create(name='STUDENT')
my_student_group[0].user_set.add(user)
return redirect('login')
return render(request,'student_signup.html',context=mydict)
html文件
{% load widget_tweaks %}
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Bootstrap CSS -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">
<title>Student Signup</title>
</head>
<body>
<h1 style="text-align: center; margin-top: 5px;">Student Signup</h1>
<div class="container mt-5" style="width: 50%;">
<form method="post">
{% csrf_token %}
<div class="mb-3">
<label for="username" class="form-label">Username</label>
{
{% render_field userForm.username type="text" class="form-control" %}
</div>
<div class="mb-3">
<label for="password" class="form-label">Password</label>
{% render_field userForm.password type="password" class="form-control" %}
</div>
<div class="mb-3">
<label for="email" class="form-label">Email</label>
{% render_field userForm.email type="email" class="form-control" %}
</div>
<div class="mb-3">
<label for="branch" class="form-label">Branch</label>
{% render_field studentForm.branch type="text" class="form-control" %}
</div>
<div class="mb-3">
<label for="mobile" class="form-label">Mobile</label>
{% render_field studentForm.mobile type="number" class="form-control" %}
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>
</body>
</html>
我在网上搜索了一下，发现当我们保存两次表单时会发生这种情况，但我不认为我这样做了。我只调用了一次保存方法。
我认为发生这种情况是因为您的用户实例绑定到表单，而不是模型实例本身，然后您将其分配给学生实例
试试看：
def register(request):
userForm= forms.StudentForm()
studentForm=forms.StudentInfoForm()
mydict={'userForm':userForm,'studentForm':studentForm}
if request.method=='POST':
userForm=forms.StudentForm(request.POST)
studentForm=forms.StudentInfoForm(request.POST)
if userForm.is_valid() and studentForm.is_valid():
user=userForm.save()
user.is_active = True
user.set_password(user.password)
messages.success(request,"Student User created Succesfully.")
student=studentForm.save(commit=False)
student.user=user.instance # user is bound to the form instance not the model instance
student.save()
my_student_group = Group.objects.get_or_create(name='STUDENT')
my_student_group[0].user_set.add(user)
return redirect('login')
return render(request,'student_signup.html',context=mydict)