To create a simple model and register it

 in the app specific files:

models.py

--------

from django.db import models

class Notes(models.Model):

  title = models.CharField(max_length=200)

  text = models.TextField()

  created = models.DateTimeField(auto_now_add=True)

python manage.py makemigrations

python manage.py migrate

admin.py

----

from django.contrib import admin

from . import models

class NotesAdmin(admin.ModelAdmin):

 list_display = ('title',)

admin.site.register(model.Notes,NotesAdmin)