Django admin does not show all entities - django

Question

I've inherited an app created with Django. There is a problem with it: in admin interface, the page lists not all entities (videos), but some (16 of 25). I have no idea, what is this.
Then I run python manage.py shell, and there Video.objects.all(), there are all 25 objects (counted them using len and by iterating them with for loop).
I have found no managers or whatever (maybe I just don't know where to look for them).
On the bottom of admin page: 25 videos, while there are only 16 rows.
Then I add to VideoModelAdmin class list_per_page = 10, paginator show three pages, but only first two of them has any Videos, third shows no rows.
Here are some code.
# admin.py
class VideoModelAdmin(admin.ModelAdmin):
list_display = ['title', 'short_desc', 'author', 'redactor_choise', 'views_num', 'rating', 'is_published']
list_filter = ['is_published', 'redactor_choise']
list_per_page = 10
actions = ['make_published', 'update_comments_count']
exclude = ('file_lq', 'file_hq', )#'thumb',)
def make_published(self, request, queryset):
queryset.update(is_published=1)
make_published.short_description = "Опубликовать выделенные"
def save_model(self, request, obj, form, change):
instance = form.save(commit=False)
instance.author = request.user
instance.save()
return instance
def update_comments_count(self, request, queryset):
for video in queryset:
video.update_comments_count()
update_comments_count.short_description = "Пересчитать комментарии!"
# later there
admin.site.register(Video, VideoModelAdmin)
# models.py
class Video(models.Model):
def make_upload_path(instance, filename):
return 'video/thumbs/' + generate_random_name(filename)
category = models.ManyToManyField(Category, limit_choices_to = {'is_published': 1})
title = models.CharField(max_length=128)
short_desc = models.CharField(max_length=255)
long_desc = tinymce_models.HTMLField(blank=True)
file_lq = models.FileField(upload_to='video/lq/', null=True, blank=True)
file_hq = models.FileField(upload_to='video/hq/', null=True, blank=True)
thumb = models.FileField(upload_to=make_upload_path, blank=True, null=True)
#thumb = fields.ThumbnailField(upload_to=make_upload_path, sizes=settings.VIDEO_THUMB_SIZE, blank=True, null=True)
author = models.ForeignKey(User, editable=False)
redactor_choise = models.BooleanField(default=False)
views_num = models.SmallIntegerField(default=0, editable=False)
comments_num = models.SmallIntegerField(default=0, editable=False)
rating = models.SmallIntegerField(default=0, editable=False)
voters = fields.PickledObjectField(blank=True, editable=False)
created = models.DateTimeField(auto_now_add=True)
is_published = models.BooleanField(default=False)
def get_absolute_url(self):
return "/video/%d" % self.id
def views_num_plus(self):
cursor = connection.cursor()
cursor.execute('update soctv_video set views_num=views_num+1 where id=%d', [self.id])
cursor.close()
def update_comments_count(self):
from threadedcomments.models import ThreadedComment as Comment
self.comments_num = Comment.objects.filter(video=self).count()
self.save()
#cursor = connection.cursor()
#cursor.execute('update soctv_video set comments_num = (select count(*) from soctv_comment where video_id = %s) where id = %s', [self.id, self.id])
#cursor.close()
def update_categories_counts(self):
cursor = connection.cursor()
cursor.execute('update soctv_category set num_items = (select count(*) from soctv_video_category where category_id = soctv_category.id)')
cursor.close()
def is_user_voted(self, uid):
try:
if self.voters[uid]:
return self.voters[uid]
except Exception:
return False
def increment_view_count(self, token):
import md5
token = md5.new(token).hexdigest()
if VideoView.objects.filter(uniquetoken=token).count() == 0:
VideoView(uniquetoken = token, video = self).save()
def view_count(self):
return self.views_num + VideoView.objects.filter(video=self).count()
def __unicode__(self):
return unicode(self.title)

Answer 1

The problem can be that some FK in some of your videos points to something that does not exist.
I had the same problem and this was the reason.

Answer 2

Django will silently fail if the value is not there in the foreign key column.
Add both null and blank attribute to the column
null=True, blank=True

Answer 3

Make sure that you are logged in to the correct account aswell.
In my case, My account did not have permissions to modify <Model>