问题
I have a very simple Django app in order to record the lectures given my colleagues.Since it is quite elementary,I am using the Django admin itself. Here is my 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()
I need to ensure that nobody enters the start date after the end date in the admin forms,so I read the django docs for custom validation in the admin and implemented the following in my admin.py:
#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:
What am I doing wrong ??
回答1:
You have an indentation issue. Your clean
method is indented within the form's Meta class. Move it back one level. Also, ensure that the return
statement is indented within the method.
回答2:
Usually you just want to define a clean() method on the model itself.
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")
Something like that will work in the django admin without any need to create a form class.
回答3:
def clean(self):
if self.database_name != '111':
raise ValidationError("You can use only letters ,numbers and
underscores.")
This clean method works perfect for me in django admin
来源:https://stackoverflow.com/questions/24802244/custom-validation-in-django-admin