# Step 01 — Application Backend Setup - geraldgsh/django-todo GitHub Wiki

Registering the Todo application

Register the todo application as an installed app so that Django can recognize it. Open the backend/settings.py file and update the INSTALLED_APPS section as so:

# backend/settings.py

# Application definition
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'todo' # add this
  ]

Defining the Todo model

Create a model to define how the Todo items should be stored in the database, open the todo/models.py file and update it with this snippet:

# todo/models.py

from django.db import models
# Create your models here.

# add this
class Todo(models.Model):
  title = models.CharField(max_length=120)
  description = models.TextField()
  completed = models.BooleanField(default=False)

  def _str_(self):
    return self.title

The code snippet above describes three properties on the Todo model:

• Title
• Description
• Completed

The completed property is the status of a task; a task will either be completed or not completed at any time.

Create a migration file and apply the changes to the database:

$ python3 manage.py makemigrations todo
$ python3 manage.py migrate todo

Open the todo/admin.py file and update:

# todo/admin.py

from django.contrib import admin
from .models import Todo # add this

class TodoAdmin(admin.ModelAdmin):  # add this
  list_display = ('title', 'description', 'completed') # add this

# Register your models here.
admin.site.register(Todo, TodoAdmin) # add this

Start the server once more and log in on the address — http://localhost:8000/admin:

$ python3 manage.py runserver

We can create, edit and delete Todo items using this interface.