如何从django内置的唯一字段验证erro响应中删除第三个括号“[]”

class CustomerAdd(models.Model): user = models.ForeignKey('accounts.CustomUser', on_delete=models.CASCADE) is_customer = models.BooleanField('customer status', default=True) is_supplier = models.BooleanField('supplier status', default=False) customer_name = models.CharField(max_length=100) customer_phone = models.CharField(max_length=15, unique=True, error_messages={'unique': "This customer_phone has " "already been registered."}) previous_due = models.DecimalField(max_digits=10, decimal_places=2, default=0.00) date = models.DateField(auto_now_add=True) picture = models.ImageField(upload_to='customer_add_pics', default='images.png') def __str__(self): return self.customer_name class Meta: verbose_name = "Customer Add" verbose_name_plural = "Customer Add"

Django引发了以下验证错误: { "customer_phone": [ "This customer_phone has already been registered." ] }

发生这种情况的原因是,同一个字段可以倍数错误。例如,密码字段可以要求至少包含八个字符,并且至少包含一个数字。通过使用列表,它可以列出一个 或者更多 同一领域的问题。从建模的角度来看,这是一种报告错误的更合理的方法。

你可以实现 custom exception handling Â ^[drf-doc] 要对每个字段仅使用第一项,请执行以下操作:

# app_name/utils.py

from rest_framework.views import exception_handler
from rest_framework.exceptions import ValidationError

def custom_exception_handler(exc, context):
    if isinstance(exc, ValidationError) and isinstance(exc.detail, dict):
        data = {
            k: vs[0]
            for k, vs in exc.detail.items()
        }
        exc = ValidationError(detail=data)
    
    return exception_handler(exc, context)

然后将异常处理程序设置为:

# settings.py

REST_FRAMEWORK = {
    # …,
    'EXCEPTION_HANDLER': 'app_name.utils.custom_exception_handler'
}

但我认为这是不好主意。一个字段可能会有多个问题,从而引发多个验证错误。