如何查看charfield choice实例

Question

我需要检查表示角色权限的charfield choice实例，但是我无法获得该实例

下面是models.py：

class User(AbstractUser):
    ROLE_CHOICES = (
        ('ADMIN', 'admin'),
        ('USER', 'user'),
        ('MODERATOR', 'moderator'),
        )
    role = models.CharField(choices=ROLE_CHOICES, default=ROLE_CHOICES[1], max_length=500)
    bio = models.CharField(max_length=500, blank=True, null=True)
    password = models.CharField(max_length=128, blank=True, null=True)
    username = models.CharField(max_length=50, blank=True, null=True, unique=True)
    email = models.EmailField(unique=True)
    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['role']

查看权限函数：

    def get_permissions(self):
        print(self.request.user.role)
        print(self.request.user.role)
        print(self.request.user.role)
        print(self.request.user.role)
        print('vvvvvvvvvvvvvvvvvk')
        if self.request.user.role == 'user':
            print(self.request.user.role)
        if self.request.user.role == 'USER':
            print(self.request.user.role)
        if self.request.user.role == ('USER', 'user'):
            print(self.request.user.role)
        if self.request.user.role in ['USER', 'user']:
            print(self.request.user.role)
            print('aaaaaaaaaaaaaa')
        if self.action == 'create' or self.action == 'perform_create':
            permission_classes = []
        elif self.action == 'list' or self.action == 'retrieve':
            permission_classes = [permissions.IsAuthenticated]
        # elif self.action == 'list':
        #     permission_classes = [IsAboveUser]
        elif self.action == 'destroy' or self.action == 'update' or self.action == 'partial_update':
            permission_classes = [permissions.IsAuthenticated]
        else:
            permission_classes = [IsAdmin]
        return [permission() for permission in permission_classes]

输出：

('USER', 'user')
('USER', 'user')
('USER', 'user')
('USER', 'user')
vvvvvvvvvvvvvvvvvk

所以没什么能通过检查

Answer 1

您的default=ROLE_CHOICES[1]应该是default=ROLE_CHOICES[1][0]，以不给出默认值的元组，而是给出值'user'。

也可以看看Django 3.1以来的新enumeration types，它使得这类错误更难犯。