Develop a Simple Python Django ToDo App in 1 minute

#python #djando #beginners #todo

Hello-Django

Completed App |
Django Official Website |
Getting Started

Make a Directory for the Project and navigate into it

mkdir hello-django && cd hello-django
Create and activate a Python Virtual Environment

python3 -m venv venv
source venv/bin/activate
Create a Django Project

django-admin startproject todoapp
Navigate into the django-project folder just created todoapp and Run the server

cd todoapp
python manage.py runserver
Quit the Server with Ctrl + C and create a application component inside the project todolist

python manage.py startapp todolist
Add the application component to the lists of apps in todoapp/settings.py INSTALLED_APPS

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'todolist', /* added line */
]

To add a view, go to todolist/views.py

# Create your views here.
def index(request):
    return render(request, "base.html", { "todo_list": todos })

For each view, register the route in a file urls.py created in the same todolist directory with the view.

from django.urls import path
from . import views

urlpatterns = [
    path("", views.index, name="index")
]

use the include function to add the todolist urls in the todoapp/urls.py on the main app.

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include('todolist.urls')),
]

Create the templates/base.html file in the project root directory sitting at the same level with todoapp and todolist directory. Make a small modification required by Django

                {% csrf_token %}

Go to todoapp/settings.py and add the templates directory to the DIR array entry of the TEMPLATES array.

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': ['templates'], /* modified */
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

Define the todolist model inside todolist/models.py

from django.db import models

# Create your models here.
class Todo(models.Model):
    title=models.CharField(max_length=350)
    complete=models.BooleanField(default=False)

    def __str__(self):
        return self.title

Run python manage.py makemigrations
- The command creates a migration for the model Todo
Then run python manage.py migrate
Create a Super user for the Admin panel python manage.py createsuperuser
Then follow the instruction to create name, email and password
Go to todolist/admin.py and register the model

from django.contrib import admin
from .models import Todo

# Register your models here.
admin.site.register(Todo)

No go to the todolist/views.py and import the Todo model

from django.shortcuts import render
from .models import Todo

# Create your views here.
def index(request):
    todos = Todo.objects.all()
    return render(request, "base.html", { "todo_list": todos })

Run the server again and test python manage.py runserver

Starting development server at http://127.0.0.1:8000/
If you try to add a record, it throws and error.
However, the TodoApp works find through the Admin Panel http://127.0.0.1:8000/admin

to implement the missing views, go to todolist/views.py

from django.shortcuts import render, redirect
from django.views.decorators.http import require_http_methods

from .models import Todo

# Create your views here.
def index(request):
    todos = Todo.objects.all()
    return render(request, "base.html", { "todo_list": todos })

@require_http_methods(["POST"])
def add(request):
    title = request.POST["title"]
    todo = Todo(title=title)
    todo.save()
    return redirect("index")

def update(request, todo_id):
    todo = Todo.objects.get(id=todo_id)
    todo.complete = not todo.complete
    todo.save()
    return redirect("index")

def delete(request, todo_id):
    todo = Todo.objects.get(id=todo_id)
    todo.delete()
    return redirect("index")

Add the views to the urlpatterns in todolist/urls.py

from django.urls import path
from . import views

urlpatterns = [
    path('', views.index, name='index'),
    path('add', views.add, name='add'),
    path('delete/<int:todo_id>/', views.delete, name='delete'),
    path('update/<int:todo_id>/', views.update, name='update'),
]

templates/base.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Todo App - Django</title>
        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/semantic-ui@2.4.2/dist/semantic.min.css">
        <script src="https://cdn.jsdelivr.net/npm/semantic-ui@2.4.2/dist/semantic.min.js"></script>
    </head>
    <body>
        <div style="margin-top: 50px;" class="ui container">
            <h1 class="ui center aligned header">Django ToDo App</h1>

            <form class="ui form" action="/add" method="post">
                <div class="field">
                    <label>Todo Title</label>
                    <input type="text" name="title" placeholder="Enter ToDo task...">
                    <br>
                </div>
                <button class="ui blue button" type="submit">Add</button>
            </form>

            <hr>

            {% for todo in todo_list %} 
            <div class="ui segment">
                <p class="ui big header">{{ todo.id }} | {{ todo.title }}</p>

                {% if todo.complete == False %}
                <span class="ui gray label">Not Complete</span>
                {% else %}
                <span class="ui green label">Complete</span>
                {% endif %}

                <a class="ui blue button" href="/update/{{ todo.id }}">Update</a>
                <a class="ui red button" href="/delete/{{ todo.id }}">Delete</a>

            </div>
            {% endfor %}

        </div>


    </body>

</html>

Finally, restart the App python manage.py runserver or refresh.
Review the App at http://127.0.0.1:8000/ and the out-of-the-box Admin Panel
Commit and push your code to github.com and Deactivate the Virtual Env.