当值为空时，Django modelSerializer form.is_valid() 为真

Posted 2023-02-24

【中文标题】当值为空时，Django modelSerializer form.is_valid() 为真

【英文标题】：Django modelSerializer form.is_valid() is true when values are empty

【发布时间】：2022-01-02 20:40:53

【问题描述】：

当我运行form.is_valid() 时，它返回true，除了branchs_count 和employee_count。当我运行 form.save() 时，它会返回关键错误

序列化器.py

class GeneralInformationFormSerializer(serializers.ModelSerializer):

    class Meta:
        model = Business
        fields = ['location', 'date_founded', 'employee_count', 'branches_count', 'business_premises']

    def update(self, instance, validated_data):
        return update_business_details(instance, validated_data)

这是models.py

class Business(SyncedBusinessModel):
    location = models.TextField(blank=True)
    employee_count = models.IntegerField(blank=True, null=True)
    branches_count = models.IntegerField(blank=True, null=True)
    business_premises = models.CharField(max_length=255, blank=True, choices=BUSINESS_PREMISES_CHOICES)
    date_founded = models.DateField(blank=True, null=True)

    def __str__(self):
        return self.name

    class Meta:
        verbose_name_plural = "businesses"

【参考方案1】：

我的模型字段有 blank=True 这意味着验证将通过空白值。由于我不想强制模型字段，但希望这个特定的序列化程序要求它们用于其他应用程序，我将 extra_kwargs 字段添加到序列化程序并解决了问题

class GeneralInformationFormSerializer(serializers.ModelSerializer):

    class Meta:
        model = Business
        fields = ['location', 'date_founded', 'employee_count', 'branches_count', 'business_premises']
        # Ensure these values are availed and empty strings
        extra_kwargs = 
            'location': 'required': True, 'allow_blank': False,
            'date_founded': 'required': True,
            'business_premises': 'required': True, 'allow_blank': False