在Django Admin中保存对模型值的更改时出现键值错误

我有一个使用注册表单创建用户的模型。表单工作正常，用户已创建并具有正确的值。但是，当我使用Django管理界面更改值并保存它们或保存并创建另一个值时，我会收到一条错误消息，如下所示（注意：我刚刚向模型添加了2个新值-已预批准且处于活动状态。我已进行了迁移）：

错误可追溯到此行：

super(ProfileTeacher, self).save(*args, **kwargs)

模型为（其中包含保存功能）：

---

我在这里做错了什么？

问题是您在

评级中设置了
null=False
。这意味着，当您通过admin表单传递空值时，Django会尝试将空字符串保存到
IntegerField
，但由于无法将其转换为整数，因此该操作失败

在字段上设置
default=0
对您没有帮助-这仅适用于创建新模型实例且未为字段提供值的情况（即使该值为空字符串）

您有两个选项：在字段上允许
null
值，或者向
save（）
方法添加一些逻辑，该方法在保存前检查空值并对其进行操作，例如：

def save(self, *args, **kwargs):
    if self.rating == '':
        self.rating = 0
    super(ProfileTeacher, self).save(*args, **kwargs)

您应该显示您试图发送的数据。基本上，您发送的是一个int为的字符串expected@EduardGamonal我如何发送该数据，它在模型中指定的Admin中。我不知道它作为字符串而不是int接收的是什么，而且似乎也没有办法找到答案（很可能我在这里是个白痴），这让我感到困惑。它还解释了为什么当所有的值都放在哪里时它会保存，为什么当我清空它们时它仍然保存，因为我没有清空评级值。我错误地认为，因为它有一个选择领域，它不可能是罪魁祸首。
class ProfileTeacher(models.Model):
    created = models.DateTimeField(auto_now=False, auto_now_add=True, blank = False, null = False, verbose_name = 'Creation Date')
    user = models.OneToOneField(app_settings.USER_MODEL,blank=True, null=False)
    first_name = models.CharField(max_length = 400, null=True, blank = True, verbose_name = 'First Name')
    last_name = models.CharField(max_length = 400, null=True, blank = True, verbose_name = 'Surname')
    phone_number = models.CharField(max_length = 15, null=True, blank = True, verbose_name = 'Phone Number')
    city = models.ForeignKey(City, null=True, blank = True, verbose_name = 'City')
    postal_code = models.CharField(max_length = 400, null=True, blank = True, verbose_name = 'Postal Code')
    adress = models.CharField(max_length = 400, null=True, blank = True, verbose_name = 'Address')
    nationality = CountryField(blank_label='(select country)', null=True, blank = True)
    id_number = models.CharField(max_length = 400, null=True, blank = True, verbose_name = 'ID Number(NIF/NIE)')
    bank_account = IBANField(verbose_name='IBAN', blank = True, null=True)
    date_of_birth = models.DateField(auto_now=False, auto_now_add=False, blank = True, null = True, verbose_name='Date of birth')
    #To enable them showing up in search. Only active teachers are shown and preapproved needs to be true to be active
    preapproved = models.BooleanField(default=False, verbose_name='Pre-Approved')
    active = models.BooleanField(default=False, verbose_name='Active')
    #Braintree and Milingual Terms of Service Acceptance
    tos = models.BooleanField(default=False, blank=True)
    #If true will receive classes email notifications
    email_notification = models.BooleanField(default=False, blank=True, verbose_name="Recibir Notificaciones")
    GENDER = (
       ('male','Male'),
       ('female','Female'),
    )
    gender = models.CharField(max_length=20, choices=GENDER, blank = True, null=True, verbose_name = 'Gender' )
    language = models.ForeignKey(Language, null = True, blank=True)
    teacher_type = models.ForeignKey(TeacherType, null = True, blank=True, verbose_name='Type')
    cvv = models.FileField(upload_to=teacher_directory_path, null=True, blank = True, verbose_name="CV")
    profile_image = models.ImageField(upload_to=teacher_directory_path,
                                      null = True,
                                      blank=True,
                                      default='/perfil.png',
                                      )


    RATINGS = (
        (1, '1'),
        (2, '2'),
        (3, '3'),
        (4, '4'),
        (5, '5'),
    )
    rating = models.IntegerField(default=0, choices=RATINGS, blank=True, verbose_name="RATINGS", null=False)
    #True if the profile will appear on milingual site as Public
    published = models.BooleanField(null=False, blank=False, default=True)
    #Url: Teacher's Url
    url = models.SlugField(max_length=400, null=True, blank = True, verbose_name='Url')
    # True if teacher is legacy
    legacy = models.BooleanField(default=False, blank=True)
    legacy_id = models.IntegerField(default=0, null=True, blank=True)

    class Meta:
        verbose_name_plural = 'Teachers'
        verbose_name = 'Teacher'

    @property
    def absolute_rating(self):
        return int(float(self.rating)/5 * 100)

    def save(self, *args, **kwargs):
        # Check how the current values differ from ._loaded_values. For example,
        # prevent changing the creator_id of the model. (This example doesn't
        # support cases where 'creator_id' is deferred).
        #Building_unique_url
        url =  str(self.first_name).lower() + '_' + str(self.last_name).lower() + '_' + str(int(self.user.id))
        self.url = url
        super(ProfileTeacher, self).save(*args, **kwargs)

    def __unicode__(self):
        return "%s %s" % (self.first_name, self.last_name)

def save(self, *args, **kwargs):
    if self.rating == '':
        self.rating = 0
    super(ProfileTeacher, self).save(*args, **kwargs)