您已经将选项设置为字符串，因此它在模型中应该是CharField(max_length=1, choices=SEX)。然后，您可以使用ModelForm，而不是在单独的表单中重复所有逻辑。例如：

# models.py
class MyModel(models.Model):
    SEX_CHOICES = (
        ('F', 'Female',),
        ('M', 'Male',),
        ('U', 'Unsure',),
    )
    sex = models.CharField(
        max_length=1,
        choices=SEX_CHOICES,
    )

# forms.py
class MyForm(forms.MyForm):
    class Meta:
        model = MyModel
        fields = ['sex',]

自 Django 4月4日起

现在有一个更合适的方法来做这件事。看看吧。基本上，你需要创建一个枚举类，就像

class SexOptions(models.TextChoices):
    FEMALE = 'F', 'Female'
    MALE = 'M', 'Male'
    UNSURE = 'U', 'Unsure'

class UserProfile(models.Model):
    user = models.ForeignKey('User')
    sex = models.CharField(max_length=1, choices=SexOptions.choices)

旧答案

class UserProfile(models.Model):
    SEX_FEMALE = 'F'
    SEX_MALE = 'M'
    SEX_UNSURE = 'U'

    SEX_OPTIONS = (
        (SEX_FEMALE, 'Female'),
        (SEX_MALE, 'Male'),
        (SEX_UNSURE, 'Unsure')
    )
    user = models.ForeignKey('User')
    sex = models.CharField(max_length=1, choices=SEX_OPTIONS)

我更喜欢这种方式，它更容易在代码中引用选项。

UserProfile.objects.filter(sex__exact=UserProfile.SEX_UNSURE)