Question

我想要实现的是，我想将配置文件模型进一步扩展到教师或学生。在注册表单中，我添加了一个选择字段，用户可以选择他是教师还是学生。以下是我的模型结构。

class Profile(UserenaLanguageBaseProfile):        
     """ Default profile """
     GENDER_CHOICES = (
             (1, _('Male')),
             (2, _('Female')),
         )

     user = models.OneToOneField(User,
                                unique=True,
                                verbose_name=_('user'),
                                related_name='profile')

    gender = models.PositiveSmallIntegerField(_('gender'),
                                              choices=GENDER_CHOICES,
                                              blank=True,
                                              null=True)

class Teacher(Profile):
    profile = models.OneToOneField(Profile,
                                unique=True,
                                verbose_name=_('profile'),
                                related_name='teacher')

    home_address =  models.CharField(_('home_address'), max_length=255, blank=True)
    home_phone =  models.CharField(_('home_phone'), max_length=30, blank=True)
    cell_phone =  models.CharField(_('cell_phone'), max_length=30, blank=True)
    experience =  models.IntegerField(default = 0)
    summary =  models.TextField(_('summary'), max_length=500, blank=True)

class Student(Profile):
    profile = models.OneToOneField(Profile,
                                unique=True,
                                verbose_name=_('profile'),
                                related_name='student')

    grade = models.CharField(_('grade'), max_length=50, blank=True)

我将注册保存方法重写为：

def save(self):
        new_user = super(SignupFormExtra, self).save()
        new_user.first_name = self.cleaned_data['first_name']
        new_user.last_name = self.cleaned_data['last_name']
        new_user.save()

        if self.cleaned_data['teacher_or_student'] == 'teacher':
            teacher = Teacher(profile = new_user.get_profile())
            teacher.save()
        elif self.cleaned_data['teacher_or_student'] == 'student':
            student = Student(profile = new_user.get_profile())
            student.save()
        return new_user

当调用teacher.save（）或student.save（）方法时，它会引发一个完整性错误“（1048，”列'user_id'不能为空“）”但我不是在这里创建一个新的用户实例我正在尝试将新创建的profile_id分配给教师或学生模型。我做错了吗？我该怎么办？

Answer 1

正如错误所示，您无法创建Student或Teacher而没有user，因为您已将其定义为不可为空的字段。

确保您已经通过了您已定义的new_user课程。

# ...
new_user.save()

if self.cleaned_data['teacher_or_student'] == 'teacher':
    teacher = Teacher(profile = new_user.get_profile(), user=new_user)
    teacher.save()
elif self.cleaned_data['teacher_or_student'] == 'student':
    student = Student(profile = new_user.get_profile(), user=new_user)
    student.save()

Answer 2

我可能错了，但你为什么要从Profile模型中继承你的模型（所以你已经有了一个“user”字段），并且在你再次获得Profile模型的“profile”OneToOneField字段之后呢？

Userena - 将Profile模型进一步扩展到两个不同的模型

2 个答案: