Customisation

General

Add options to the ModelAdmin class:

class BookAdmin(admin.ModelAdmin):
    # use fields... or "exclude = ('title',)".
    fields = ('publisher', 'publication_date')
    list_display = ('title', 'publisher', 'publication_date')
    list_filter = ('publisher', 'publication_date')
    ordering = ('-publication_date',)
    search_fields = ('title',)

The list_display option controls which columns appear in the change list table. By default, the change list displays only a single column that contains the object’s string representation.
You will probably need to re-start the test server for the fields or exclude option to take effect.

Note: To display attributes of a foreign key, create a method on your model which returns the required data e.g:

class WorkingOnTicket(models.Model):
    user = models.ForeignKey(User)
    working_on = models.BooleanField()

    def working_on_user(self):
        return '%s' % self.user.username

This method (callable) can be added to the list_display e.g:

list_display = ('working_on_user', 'working_on',)

The list_filter option creates the filtering bar on the right side of the list. You can instruct the admin interface to filter by any field, but foreign keys, dates, Booleans, and fields with a choices attribute work best.
The ordering option controls the order in which the objects are presented in the admin interface.

Note: Django will only honor the first element in the list.
The search_fields option creates a field that allows text searches.

Inline

To edit squash courts on the same page as the club details:

from django.contrib import admin
from squash_club.club.models import Club
from squash_club.club.models import Court

class CourtInline(admin.TabularInline):
    model = Court

class ClubAdmin(admin.ModelAdmin):
    inlines = [
        CourtInline
    ]

admin.site.register(Club, ClubAdmin)

Media

Not really sure about this, but to reference media on an admin page, I think the URL is /adminmedia e.g:

/adminmedia/img/admin/arrow-up.gif

Query Set

class TextKeyAdmin(admin.ModelAdmin):
    def queryset(self, request):
        qs = self.model._default_manager.get_query_set().filter(id='144')
        return qs

… or if (for example), we have a manager on the model called dahl_objects:

def queryset(self, request):
    return self.model.dahl_objects

(see Manager).

Note: Return the query set as the function name not as an object i.e. don’t return dahl_objects().

`SlugField`

To automatically populate the SlugField, see Field Type, SlugField.

User

The save_model method is given the HttpRequest, a model instance, a ModelForm instance and a boolean value based on whether it is adding or changing the object. Here you can do any pre or post-save operations.

For example to attach request.user to the object prior to saving:

class ArticleAdmin(admin.ModelAdmin):
    def save_model(self, request, obj, form, change):
        obj.user = request.user
        obj.save()