django admin interface not behaving properly in firefox.

[chs2048@…]

Hi,

I have a simple Django app that connects to a database and allows me to administrate it.

It consists of a few models, and some inlines, but little else other than Django.

but I'm getting strange behavior when using firefox 13.0.1 (IE 8.0 works).

for the following inlines:

class UserRoleClientMembershipInline(admin.TabularInline):
    model = UserRoleClientMembership
    extra = 1

class UserRoleClientGroupMembershipInline(admin.TabularInline):
    model = UserRoleClientGroupMembership
    extra = 1

class UserAdmin(admin.ModelAdmin):
    inlines = [UserRoleClientMembershipInline, UserRoleClientGroupMembershipInline]

admin.site.register(User, UserAdmin)

where the model 'user' is:

class User(models.Model):
    user_name = models.CharField(max_length=1024)
    roles = models.ManyToManyField(Role, through='UserRoleClientMembership')
    def __unicode__(self):
        return self.user_name
    class Meta:
        db_table = u'users'

When I try to add any user I get:

ValidationError at <url>
[u'ManagementForm data is missing or has been tampered with']

Also, when I remove the second inline, adding users works, but if I enter incomplete data in the first inline, firefox doesn't always give a (second field required) like IE does, it just ignores the inline instead. At other times, firefox *has* added new users, and has displayed the field-required warning.

I should note that I'm running Django ontop of Jython ontop of tomcat6 (which has caused problems before), but in this case I'm curious as to why IE works correctly.

Thanks.

[Chris2048 <chs2048@…>]

Chrome 20.0 also works.

[Julien Phalip]

I'm afraid I can't reproduce this. Your code samples were incomplete so I've made some guesses and used the following:

# models.py

from django.db import models

class Role(models.Model):
    name = models.CharField(max_length=255)

class Group(models.Model):
    name = models.CharField(max_length=255)

class UserRoleClientGroupMembership(models.Model):
    group = models.ForeignKey('Group')
    user = models.ForeignKey('User')

class UserRoleClientMembership(models.Model):
    role = models.ForeignKey('Role')
    user = models.ForeignKey('User')

class User(models.Model):
    user_name = models.CharField(max_length=1024)
    roles = models.ManyToManyField(Role, through='UserRoleClientMembership')
    def __unicode__(self):
        return self.user_name


# admin.py

from django.contrib import admin
from models import *

class UserRoleClientMembershipInline(admin.TabularInline):
    model = UserRoleClientMembership
    extra = 1

class UserRoleClientGroupMembershipInline(admin.TabularInline):
    model = UserRoleClientGroupMembership
    extra = 1

class UserAdmin(admin.ModelAdmin):
    inlines = [UserRoleClientMembershipInline, UserRoleClientGroupMembershipInline]

admin.site.register(User, UserAdmin)

Could you please provide more specific code samples and instructions to reproduce the problem?

[Chris2048]

Ok, I managed to fix it.

The issue was that the multipart/form-data packets didnd't contain all the form fields (as verified by wire-shark),
the data was missing for some reason. It was also the case that the data seem to be cut off at a certain point (the issue only arose on pages with lots of fields).

Infact, it was the fact I was running Django-on-Jython on top of tomcat as described ​here.

There is already a ticket for this, #13756,
and a bug on the jython bugtracker, ​issue1754

Thank you for you attention.