Django：管理员中的验证错误 [英] Django: Validation error in Admin

问题描述

NEWBIE ALERT！

背景：

我正在写一个需要验证的模型。我不能拥有重叠日期范围的两个项目。我有一切工作，除了当我提出forms.ValidationError，我得到黄色的屏幕死亡（debug = true）或500页（debug = false）。

For the first time, I am writing a model that needs to be validated. I cannot have two Items that have overlapping "date ranges". I have everything working, except when I raise forms.ValidationError, I get the yellow screen of death (debug=true) or a 500 page (debug=false).

我的问题：

如何在管理中显示错误消息一个必填的空白）？

How can I have an error message show up in the Admin (like when you leave a required filed blank)?

对于我的经验不好，请让我知道，如果我可以更好地澄清问题。

Sorry for my inexperience, please let me know if I can clarify the question better.

Models.py

Models.py

from django.db import models
from django import forms
from django.forms import ModelForm
from django.db.models import Q 

class Item(models.Model):
    name = models.CharField(max_length=500)
    slug = models.SlugField(unique=True)
    startDate = models.DateField("Start Date", unique="true")
    endDate = models.DateField("End Date")

    def save(self, *args, **kwargs):
        try:
            Item.objects.get(Q(startDate__range=(self.startDate,self.endDate))|Q(endDate__range=(self.startDate,self.endDate))|Q(startDate__lt=self.startDate,endDate__gt=self.endDate))

            #check for validation, which may raise an Item.DoesNotExist error, excepted below
            #if the validation fails, raise this error:

            raise forms.ValidationError('Someone has already got that date, or somesuch error message')

         except Item.DoesNotExist:
             super(Item,self).save(*args,**kwargs)          


    def __unicode__(self):
        return self.name

    def get_absolute_url(self):
        return "/adtest/%s/" % self.slug    

推荐答案

对于Django 1.2，请参阅 http://docs.djangoproject.com/en/dev/ref/forms/validation/#using-validation-in -practice 。

For Django 1.2 see http://docs.djangoproject.com/en/dev/ref/forms/validation/#using-validation-in-practice.

在1.2之前的版本中，您必须为您的管理员制作自己的模型表单，并将验证方法放在那里！ http：//docs.djangoproject .com / en / dev / ref / forms / validation /＃cleaning-a-specific-field-attribute

In versions prior to 1.2 you would have to make your own model form for your admin and put your validation methods there! http://docs.djangoproject.com/en/dev/ref/forms/validation/#cleaning-a-specific-field-attribute

from django import forms
from models import Item

class ItemForm(forms.ModelForm):

   class Meta:
       model = Item

   def clean(self, value):
       data = self.cleaned_data
       start = data['startDate']
       end =  data['endDate']
       try:
           item = Item.objects.get(Q(startDate__range=(start,end))|\
                                   Q(endDate__range=(start,end))|\
                                   Q(startDate__lt=start,endDate__gt=end))
           raise forms.ValidationError('.....')
       except:
           pass

   return data 

然后放入你的管理员 form = ItemForm ，并确保在之前定义表单！
有关更详细的说明，请参见 http://www.jroller.com/RickHigh/ entry / django_admin_validation_of_multiple 。

进一步分类到django约定，你应该命名你的字段，例如。 end_date 而不是 endDate 。猜猜你甚至不需要再指定他们的verbose_name了！

Then put in your admin form=ItemForm and make sure to define the form somewhere before! For a more detailled description see http://www.jroller.com/RickHigh/entry/django_admin_validation_of_multiple.
Further to assort to django conventions you should name your fields eg. end_date and not endDate. Guess you will not even need to specify their verbose_name then anymore!

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