How to allow sorting in the Django admin by a custom list_display field, which doesn't have a DB fie

Posted by Gj on Stack Overflow See other posts from Stack Overflow or by Gj
Published on 2010-04-15T17:36:00Z Indexed on 2010/04/17 4:23 UTC
Read the original article Hit count: 248

Filed under:

django

|

django-admin

I have a custom list_display field which is responsible for a column of integers in one of my admin pages.

I need to allow staff members to sort according to it.

There's a solution for how to acheive that if the integer represents a count/average/etc of some DB field, which is not the case for me.

[ the solution for that case is here: http://stackoverflow.com/questions/2168475/django-admin-how-to-sort-by-one-of-the-custom-list-display-fields-that-has-no-da ]

Any ideas how I can achieve this sorting without actually creating and maintaining a DB field for the values?

© Stack Overflow or respective owner

Related posts about django

Overriding the save() method of a model that uses django-mptt

as seen on Stack Overflow - Search for 'Stack Overflow'
I've been using django-mptt in my project for a while now, it's fabulous. Recently, I've found a need to override a model's save() method that uses mptt, and I'm getting an error when I try to save a new instance of that model: Exception Type: ValueError at /admin/scrivener/page/add/ Exception Value:… >>> More
Where is meta.local_fields set in django.db.models.base.py ?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm getting the error: Exception Value: (1110, "Column 'about' specified twice") As I was reviewing the Django error page, I noticed that the customizations the model User, seem to be appended to the List twice. This seems to be happening here in django/db/model/base.py in base_save(): values… >>> More
Deploying Django on EC2 using Bitnami Djangostack: WSGI script cannot be loadded

as seen on Stack Overflow - Search for 'Stack Overflow'
I've been struggling to deploy Django application on Amazon EC2 using Bitnami Djangostack for the last couple of days. When I go to http://dewey.io I see the default bitnami page (/opt/bitnami/apache2/htdocs/index.html), however, when I open http://dewey.io/portnoy, I get 'Internal Server Error'… >>> More
Internal Server Error with mod_wsgi [django] on windows xp

as seen on Stack Overflow - Search for 'Stack Overflow'
when i run development server it works very well, even an empty project runing in mod_wsgi i have no problem but when i want to put my own project i get an Internal Server Error (500) in my apache conf i put WSGIScriptAlias /codevents C:/django/apache/CODEvents.wsgi <Directory "C:/django/apache"> Order… >>> More
Internal Server Error with mod_wgsi [django] on windows xp

as seen on Stack Overflow - Search for 'Stack Overflow'
when i run development server it works very well, even an empty project runing in mod_wsgi i have no problem but when i want to put my own project i get an Internal Server Error (500) in my apache conf i put WSGIScriptAlias /codevents C:/django/apache/CODEvents.wsgi <Directory "C:/django/apache"> Order… >>> More

Related posts about django-admin

Django-admin.py not working (-bash:django-admin.py: command not found)

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm having trouble getting django-admin.py to work... it's in this first location: /Users/mycomp/bin/ but I think I need it in another location for the terminal to recognize it, no? Noob, Please help. Thanks!! my-computer:~/Django-1.1.1 mycomp$ sudo ln -s /Users/mycomp/bin/django-admin.py /Users/mycomp/django-1… >>> More
How to open python scripts directly by typing in their name in terminal (Mac OS X)

as seen on Super User - Search for 'Super User'
I'm working on installing django and running it on my system. I have a problem though, in this tutorial creating a project is explained by running the command django-admin.py startproject mysite My issue is that this doesn't work. I changed to the directory where django-admin.py is located and… >>> More
Django admin site populated combo box based on imput

as seen on Stack Overflow - Search for 'Stack Overflow'
hi i have to following model class Match(models.Model): Team_one = models.ForeignKey('Team', related_name='Team_one') Team_two = models.ForeignKey('Team', related_name='Team_two') Stadium = models.CharField(max_length=255, blank=True) Start_time = models.DateTimeField(auto_now_add=False… >>> More
Django Admin: Detect if a subset of an object fields has changed and which of them

as seen on Stack Overflow - Search for 'Stack Overflow'
I need to detect when some of the fields of certain model have changed in the admin, to later send notifications depending on which fields changed and previous/current values of those fields. I tried using a ModelForm and overriding the save() method, but the form's self.cleaned_data and seld.instance… >>> More
Django admin, hide a model

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello At the root page of the admin site where registered models appear, I want to hide several models that are registered to the Django admin. If I directly unregister those, I am not able to add new records as the add new symbol "+" dissapears. How can this be done ? >>> More