Admin

Replace the default /admin with /your_own address

...
from django.http import HttpResponse

def restricted(request):
    return HttpResponse("Access to the admin area is restricted.")

urlpatterns = [
    path('admin/', restricted),
    path('secret_admin/', admin.site.urls),
    ...
]

---

Register models and customize the Admin Panel

Imports

from django.contrib import admin
from django.contrib.auth.admin import UserAdmin
from django.contrib.auth.models import User

from .models import DBSpecies, DBFossil

Register

When you register a model in the Django admin panel using the admin.site.register method, only the species name will be displayed by default, as specified in the __str__ method of the model (def __str__(self): return f"{self.species_name}")

admin.site.register(DBSpecies)

Custom admin class

To include more fields, add filters, search, actions and more you can create a new admin class that inherits from the built-in ModelAdmin class and register it with the model.

def sell(modeladmin, request, queryset):
    queryset.update(fossil_status="Sold")
sell.short_description = "Sell selected fossils"

class DBFossilAdmin(admin.ModelAdmin):
    list_display = ('fossil_name', 'fossil_species', 'fossil_owner', 'fossil_status', 'fossil_age_mln')
    list_filter = ('fossil_status', 'fossil_species__species_name') # __ allows to traverse relationships and filter on related fields
    search_fields = ['fossil_name']
    actions = [sell]
admin.site.register(DBFossil, DBFossilAdmin)

def sell(modeladmin, request, queryset):
    queryset.update(fossil_status="Sold")
sell.short_description = "Sell selected fossils"

Merge the User and Profile models

class CustomUserAdmin(UserAdmin):
    ordering = ('-last_login',)
    list_display = (
        'id',
        'is_active',        
        'usr',      
        'email',
        'additional_email',
        'species',
        'fossils',
        'last_login',
        'website',       
        )

    def id(self, obj):
        return obj.id
    
    def is_active(self, obj):
        return obj.is_active

    def usr(self, obj):
        return obj.username
    
    def email(self, obj):
        return obj.email
    
    def additional_email(self, obj):
        return obj.profile.user_additional_email
       
    def species(self, obj):
        return obj.species_owner.count()
        # if obj.species_owner.count() doesn't work, try replacing with: DBSpecies.objects.filter(species_owner=obj).count()
    
    def fossils(self, obj):
        return obj.fossil_owner.count()
        # if obj.fossil_owner.count() doesn't work, try replacing with: DBFossil.objects.filter(fossil_owner=obj).count()
    
    def last_login(self, obj):
        return obj.last_login    

    def website(self, obj):
        return obj.profile.user_website

admin.site.unregister(User)
admin.site.register(User, CustomUserAdmin)

---

Sample admin.py file

from django.contrib import admin
from django.contrib.auth.admin import UserAdmin
from django.contrib.auth.models import User

from .models import DBSpecies, DBFossil

admin.site.register(DBSpecies)

def sell(modeladmin, request, queryset):
    queryset.update(fossil_status="Sold")
sell.short_description = "Sell selected fossils"

class DBFossilAdmin(admin.ModelAdmin):
    list_display = ('fossil_name', 'fossil_species', 'fossil_owner', 'fossil_status', 'fossil_age_mln')
    list_filter = ('fossil_status', 'fossil_species__species_name')
    actions = [sell]
admin.site.register(DBFossil, DBFossilAdmin)

def sell(modeladmin, request, queryset):
    queryset.update(fossil_status="Sold")
sell.short_description = "Sell selected fossils"

class CustomUserAdmin(UserAdmin):
    ordering = ('-last_login',)
    list_display = (
        'id',
        'is_active',        
        'usr',      
        'email',
        'additional_email',
        'species',
        'fossils',
        'last_login',
        'website',       
        )

    def id(self, obj):
        return obj.id
    
    def is_active(self, obj):
        return obj.is_active

    def usr(self, obj):
        return obj.username
    
    def email(self, obj):
        return obj.email
    
    def additional_email(self, obj):
        return obj.profile.user_additional_email
        
    def species(self, obj):
        return obj.species_owner.count()
        # if obj.species_owner.count() doesn't work, try replacing with: DBSpecies.objects.filter(species_owner=obj).count()
    
    def fossils(self, obj):
        return obj.fossil_owner.count()
        # if obj.fossil_owner.count() doesn't work, try replacing with: DBFossil.objects.filter(fossil_owner=obj).count()
    
    def last_login(self, obj):
        return obj.last_login    

    def website(self, obj):
        return obj.profile.user_website

admin.site.unregister(User)
admin.site.register(User, CustomUserAdmin)