Django 管理中的自定义验证

我有一个非常简单的 Django 应用程序，用于记录同事的讲座。由于它非常初级，所以我使用 Django 管理本身。这是我的 models.py：

#models.py
from django.db import models

class Lecture(models.Model):
    topic = models.CharField(max_length=100)
    speaker = models.CharField(max_length=100)
    start_date = models.DateField()
    end_date = models.DateField()

我需要确保没有人在管理表单中输入结束日期之后的开始日期，因此我阅读了 django 文档以在管理中进行自定义验证，并在我的 admin.py 中实现了以下内容：

#admin.py
from models import Lecture
from django.contrib import admin
from django import forms


class LectureForm(forms.ModelForm):
    class Meta:
        model = Lecture

        def clean(self):
            start_date = self.cleaned_data.get('start_date')
            end_date = self.cleaned_data.get('end_date')
            if start_date > end_date:
                raise forms.ValidationError("Dates are incorrect")
        return self.cleaned_data


class LectureAdmin(admin.ModelAdmin):
    form = LectureForm
    list_display = ('topic', 'speaker', 'start_date', 'end_date')

admin.site.register(Lecture, LectureAdmin)

However,this has no effect whatsoever on my admin and I am able to save lectures where start_date is after end_date as seen in the image:

我究竟做错了什么 ？？

通常您只想在模型本身上定义一个 clean() 方法。

https://docs.djangoproject.com/en/2.1/ref/models/instances/#validating-objects https://docs.djangoproject.com/en/2.1/ref/models/instances/#validating-objects

from django.core.exceptions import ValidationError

class Lecture(models.Model):
    topic = models.CharField(max_length=100)
    speaker = models.CharField(max_length=100)
    start_date = models.DateField()
    end_date = models.DateField()

    def clean(self):
        if self.start_date > self.end_date::
            raise ValidationError("Dates are incorrect")

类似的东西可以在 django admin 中工作，无需创建表单类。