Question

让我们解决问题我有一个页面，我希望用户填写有关自己的信息，我想保存该数据。但是我遇到了这个错误。

IntegrityError at /accounts/profile/edit/1/change-profile/ UNIQUE constraint failed: accounts_user.username

这是我的观点。py

def change_profile(request, pk):
    form = ChangeProfile(request.POST or None)
    user_ = request.user
    if request.method == "POST":
        if form.is_valid():
            form.save()
            return redirect("/accounts/profile/edit/{}/".format(user_.pk))
    args = {'form': form}
    return render(request, 'change_profile.html', args)

我的模型。py

class GradeUser(models.Model):
    grade = models.CharField(max_length=20, null=True)

class Country(models.Model):
    country = models.CharField(max_length=30, null=True)

class User(AbstractBaseUser):
    email = models.EmailField(
        verbose_name = 'email address',
        max_length=255,
        unique=True
        )
    real_name = models.CharField(max_length=20, blank=True)
    username = models.CharField(max_length=40, unique=True, verbose_name='username')
    grade = models.ForeignKey(GradeUser, on_delete=models.CASCADE, blank=True, null=True)
    country = models.ForeignKey(Country, on_delete=models.CASCADE, blank=True, null=True)
    reputation = models.IntegerField(default=0)
    image = models.ImageField(upload_to='accounts/media', blank=True)
    about_me = models.TextField()


    USERNAME_FIELD= 'email'
    REQUIRED_FIELDS = ['username']

    objects = UserManager()

forms.py

class ChangeProfile(forms.ModelForm):
    class Meta:
        model = User
        fields = ('real_name', 'grade', 'country', 'about_me')

究竟出了什么问题？

为什么需要用户名？

保存该怎么办？

Answer 1

您打算对用户（已经存在）执行更新，但是在这里您要创建一个没有用户名属性的全新用户实例，这就是产生错误的原因。尝试以下代码：它获取您的当前用户，并使用表单提供的信息对其进行更新。

PS：我没有对返回值做任何修改，因为我不知道您在那做什么，但是请注意，您不需要通过参数传递用户pk，用户数据已经存储在请求对象中。

def change_profile(request, pk):
form = ChangeProfile()
user_ = request.user
if request.method == "POST":
    form = ChangeProfile(request.POST)
    if form.is_valid():
        user_new_info=form.save(commit=false)
        user_.real_name = user_new_info.real_name
        user_.grade = user_new_info.grade
        user_.country = user_new_info.country
        user_.about_me = user_new_info.about_me
        user_.save()
        return redirect("/accounts/profile/edit/{}/".format(user_.pk))
args = {'form': form}
return render(request, 'change_profile.html', args)

唯一约束失败：accounts_user.username

1 个答案: