如何创建一个 UserProfile 字段，它是 User 字段的别名？

Question

我想访问 User 模型的 first_name、last_name 和来自 UserProfile 的电子邮件字段，就好像它们是 UserProfile 自己的字段一样。

class Person(models.Model):
    user = models.OneToOneField(User)
    name = #ModelField which refers to user.first_name
    surname = #ModelField which refers to user.last_name
    email = #ModelField which refers to user.email
    birth_date = models.DateField(null=True, blank=True)
    #and other fields

我可以使用独立的名字、姓氏、电子邮件、字段，但它会导致用户字段的数据重复。

upd

我希望 name、surname 和 email 属于某些 Field 类型（如 birth_date）并将这些字段修改为等同修改相应的用户字段（属性行为如下所示）。我需要这个，因为我希望这三个字段在管理界面中可食用，或者与 ModelForm 中的 "native" 字段同等处理。

upd解决方法。不是很花哨，但它对我有用：

class Person(models.Model):
    user = models.OneToOneField(User)
    #and also some char, text fields

    @property
    def name(self):
        return self.user.first_name
    @name.setter
    def name(self, value):
        self.user.first_name = value

    #and by analogy surname and email properties


class PersonForm(ModelForm):
    class Meta:
        model = Person
        exclude = ('user',)

    name = forms.CharField(max_length=100, required=False)
    surname = forms.CharField(max_length=100, required=False)
    email = forms.EmailField(required=False)

    #no make fields filled with User data on form load
    def __init__(self, *args, **kwargs):
    if 'instance' in kwargs:
        instance = kwargs['instance']
        initial = kwargs.get('initial', {})
        initial['name'] = instance.name
        initial['surname'] = instance.surname
        initial['email'] = instance.email
        kwargs['initial'] = initial
    super(PersonForm, self).__init__(*args, **kwargs)

    # to save form data to User model when commit
    def save(self, commit=True):
        instance = super(PersonForm, self).save(commit)  
        user = instance.user
        user.first_name = self.cleaned_data['name']
        user.last_name = self.cleaned_data['surname']
        user.email = self.cleaned_data['email']
        user.save()
        return instance

class PersonAdmin(admin.ModelAdmin):
    fields = ['name', 'surname', 'email', 'and_others']

    form = PersonForm

admin.site.register(Person, PersonAdmin)

Answer 1

class Person(models.Model):
    user = models.OneToOneField(User)
    @property
    def name(self):
        return self.user.first_name
    @property
    def surname(self):
        return self.user.last_name

Answer 2

如果您想要访问 user.first_name、user.last_name 等...直接作为 Person 的属性，您可以向 Person 模型添加名称、姓氏等...属性，而不是字段：

class Person(models.Model):
    user = models.OneToOneField(User)
    birth_date = models.DateField(null=True, blank=True)
    #and other fields

    @property
    def name(self):
        return self.user.first_name

    @property
    def surname(self):
        return self.user.last_name
    ....

如何创建一个 UserProfile 字段，它是 User 字段的别名？

How to create a UserProfile field which is alias for a User field?

python

django

django-users