Save in Django Admin sometimes fails - django

Question

I have a portfolio page with django, and i'm noticing a strange behaviour when a try to save an edited entry. It saves, and then it seems that the redirect fails to catch the ID and then goes to a 404 page that says domain.com/admi/internal_error.html/ in the URL (note the admi, sometimes is ad or adm). It happens with both 'Save' and 'Save and continue editing'.
This is my model
from django.db import models
from ramonlapenta.portfolio.managers import EntryManager
from ramonlapenta.slughifi import slughifi
class Type(models.Model):
type = models.CharField(max_length=100)
def __unicode__(self):
return self.type
class Entry(models.Model):
type = models.ForeignKey(Type)
created = models.DateTimeField(auto_now_add=True)
title = models.CharField(max_length=100)
slug = models.SlugField()
description = models.TextField()
requirement = models.TextField()
solution = models.TextField()
url = models.CharField(blank=True, max_length=64)
published = models.BooleanField(db_index=True, default=True)
logo = models.ImageField(upload_to="logos")
image = models.ImageField(upload_to="portfolio", height_field='height', width_field='width')
height = models.CharField(max_length=3)
width = models.CharField(max_length=3)
objects = EntryManager()
def __unicode__(self):
return u"%s - %s" % (self.title, self.created)
class Meta:
verbose_name_plural = "entries"
def save(self, *args, **kwargs):
self.slug = slughifi(self.title)
super(Entry, self).save(*args, **kwargs)
And this is the admin.py
from django.contrib import admin
from ramonlapenta.portfolio.models import Type
from ramonlapenta.portfolio.models import Entry
from django import forms
class EntryAdmin(admin.ModelAdmin):
fieldsets = [
('Title', {'fields' : ['title']}),
('Address', {'fields' : ['url']}),
('Description', {'fields' : ['description','requirement','solution']}),
('Type', {'fields' : ['type']}),
('Image', {'fields' : ['logo', 'image']}),
]
list_display = ('title', 'created')
list_filter = ['created', 'type']
admin.site.register(Type)
admin.site.register(Entry, EntryAdmin)
This is my entry manager, where i only filter the results.
from django.db import models
class EntryManager(models.Manager):
def published(self):
return self.model.objects.filter(published=True).order_by('-id')
This is the general urls.py
from django.conf.urls.defaults import patterns, include, url
from django.conf.urls.defaults import *
from django.contrib import admin
admin.autodiscover()
urlpatterns = patterns('',
(r'^', include('site.pages.urls')),
(r'^', include('site.blog.urls')),
(r'^', include('site.portfolio.urls')),
(r'^admin/', include(admin.site.urls)),
)
And the portfolio urls.py
from django.conf.urls.defaults import *
urlpatterns = patterns('ramonlapenta.portfolio.views',
url(r'^portfolio/$', 'index', name="port-main"),
url(r'^portfolio/(?P<item_slug>[a-zA-Z0-9_.-]+)/$', 'detail', name="port-slug"),
url(r'^portfolio/type/(?P<type>[a-zA-Z0-9_.-]+)/$', 'type', name="port-type")
)
Thos is what i see with HttpFox:
Note: everything else works fine, even there it sometimes works fine, and the public site works fine too. The problem is just editing a portfolio entry.
Does anybody knows why is this happening and how can i fix it?

Answer 1

My guess is that the main url.py is catching some of the admin data (being that any admin action will be considered by all the other urlconfs.
Try to put the admin urls at the top:
urlpatterns = patterns('',
(r'^admin/', include(admin.site.urls)),
(r'^', include('site.pages.urls')),
(r'^', include('site.blog.urls')),
(r'^', include('site.portfolio.urls')),
)
Edit: second guess
The key information is that second 302 in the request list. Someone (probably dreamost's apache) is eating the response and returning a redirect to a custom page.
In this case setting DEBUG = True is of no help, because the response would have anyway the same error.
This means two things:
You have an error somewhere in your Model's code, probably some attribute/field/property that's used to display the object.
To isolate the error, try to find a pattern on which specific values trigger the error and which values allows to load the admin form.
You can't see the django error page unless you either work locally in the development server (manage.py runserver) or disable custom error pages in dreamhost as other suggest.

Answer 2

Knowing your setup and what appears in server logs at the time you're saving an entry might help us locate a problem. It's likely that the cause is outside Django (since the bug is not reproducible under Django's development server).
Anyway, you might find some of these solutions relevant:
Django on dreamhost problem (old post, but symptoms described there are similar, might be relevant if you're running Django on FastCGI).
getting 500 internal server error with django on dreamhost (in short: just try re-create the whole setup and see if that helps).
Or you may want simply to google dreamhost django 500 in case you haven't already, seems like people frequently encounter similar problem while setting up Django on Dreamhost.

Answer 3

I'll be curious to see your urls.py . My guess is that the regex for the admin site is bogus.

Answer 4

For sure an error is happening when you save those entries and you should check your logs. Or try reproduce it with DEBUG=True
My guess is that you are using dreamhost and Dreamhost allows you to define custom error pages and "internal_error.html" is for the status 500 error page (see : http://wiki.dreamhost.com/Creating_custom_error_pages).

Answer 5

Try to have a look at your dreamhost error.log file.
The sure thing is that the problem comes from your dreamhost configuration and not your django code (since it is working properly in development with Django 1.2)