When you created your own Models in a app, they still need to be registered in order to become available in the admin pages.
This is done in the admin submodule. If your app was created using manage.py startapp, an admin.py file should already lay in you app module. Otherwise create it.
#myapp/admin.py
from django.contrib import admin
from myproject.myapp.models import MyModel
admin.site.register(MyModel)
All options are defined on the ModelAdmin subclass. some options:
class MyCustomAdmin(admin.ModelAdmin):
list_display = ('name','age','email') # fields to display in the listing
empty_value_display = '-empty-' # display value when empty
list_filter = ('name', 'company') # enable results filtering
list_per_page = 25 # number of items per page
ordering = ['-pub_date', 'name'] # Default results ordering
# and register it
admin.site.register(MyModel, MyCustomAdmin)
A more concise way to register a model is to use the admin.register decorator:
@admin.register(MyModel)
class MyCustomAdmin(admin.ModelAdmin)
...