Question

我想创建一个模型，它应该只接受今天15天后的日期并存储开始和结束时间，并在我们输入开始时间之前的结束时间时显示错误。

Answer 1

模型清洁功能正是您所需要的。

这是一个从django文档开始的例子：

import datetime
from django.core.exceptions import ValidationError
from django.db import models

class Article(models.Model):
    ...
    def clean(self):
        # Don't allow draft entries to have a pub_date.
        if self.status == 'draft' and self.pub_date is not None:
            raise ValidationError('Draft entries may not have a publication date.')
        # Set the pub_date for published items if it hasn't been set already.
        if self.status == 'published' and self.pub_date is None:
            self.pub_date = datetime.date.today()

有关详细信息，请参阅此处：https://docs.djangoproject.com/en/dev/ref/models/instances/#validating-objects

Django模型日期时间字段

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