多種類型的用戶有很多共同的屬性

Question

如何創建兩個User類型有很多共同的屬性？據我所知，創建兩種User的最佳做法是創建2 UserProfiles。我有類型 - Firm和Person。所以我決定創建兩個UserProfiles：

class FirmProfile(models.Model): 
    user = models.OneToOneField(User, related_name='firmprofile') 
    prefered_times = ... 
    favourite_food = ... 

class PersonProfile(models.Model): 
    user = models.OneToOneField(User, related_name='personprofile') 
    prefered_times = ... 
    favourite_food = ... 

現在，我正在尋找一種方法，我就不必寫兩次的屬性。可能嗎？

編輯：我創建了這一點，但我不知道這是否是最好的選擇，因爲每個用戶配置將有兩個配置文件 - 公司和個人

class UserProfile(User): 
    user = models.OneToOneField(User, related_name='userprofile') 

    TYPE_OF_USER_CHOICES = (('firm','Firm'), 
          'person','Person') 

    type_of_user = models.CharField(max_length=40, choices=TYPE_OF_USER_CHOICES) 

class FirmProfile(models.Model): 
    user = models.OneToOneField(User, related_name='firmprofile') 

class PersonProfile(models.Model): 
    user = models.OneToOneField(User, related_name='personprofile') 

Answer 1

有很多方法可以做到這一點https://docs.djangoproject.com/en/1.9/topics/db/models/#model-inheritance

最簡單的將創建abstract模型

class BaseProfile(models.Model): 
    prefered_times = ... 
    favourite_food = ... 

    class Meta: 
     abstract = True 

class FirmProfile(BaseProfile): 
    user = models.OneToOneField(User, related_name='firmprofile') 
    ... # all custom fields can be defined here 

class PersonProfile(BaseProfile): 
    user = models.OneToOneField(User, related_name='personprofile') 
    ... 

回答評論 你可以這樣

def get_user_type(user): 
    if getattr(user, 'firmprofile', None): 
     return 'firm' 
    elif getattr(user, 'personprofile', None): 
     return 'person' 
    else: 
     return None