可以在django模型验证器中使用多个值吗?

时间:2012-09-28 11:20:37

标签: django model validation

我有一个模型使用一个名为CompareDates的验证类作为我的模型验证器,我想传递验证器两个字段值。但是我不确定如何在验证器中使用多个字段值。

我希望能够在日期之间进行比较,以便整体验证模型,但似乎您无法关联传递给验证器的值,或者我错过了什么?

from django.db import models
from myapp.models.validators.validatedates import CompareDates

class GetDates(models.Model):
    """
    Model stores two dates
    """
    date1 = models.DateField(
            validators = [CompareDates().validate])
    date2 = models.DateField(
            validators = [CompareDates().validate])

1 个答案:

答案 0 :(得分:4)

“普通”验证器只会获取当前字段值。所以它不会做你想做的事情。但是,您可以添加一个干净的方法,并且 - 如果需要 - 应该覆盖您的保存方法:

class GetDates(models.Model):
    date1 = models.DateField(validators = [CompareDates().validate])
    date2 = models.DateField(validators = [CompareDates().validate])
    def clean(self,*args,**kwargs):
        CompareDates().validate(self.date1,self.date2)
    def save(self,*args,**kwargs):
        # If you are working with modelforms, full_clean (and from there clean) will be called automatically. If you are not doing so and want to ensure validation before saving, uncomment the next line.
        #self.full_clean()
        super(GetDates,self).save(*args,**kwargs)