<h2>What is Django?</h2>
<p>Python-based web framework used for rapid development of web applications.</p>
<h2>Installing Django + Setup</h2>
<pre class="language-python"><code>pip install django</code></pre>
<h3>Creating a project</h3>
<p>The below command creates a new project named projectName</p>
<pre class="language-python"><code>django-admin startproject projectName</code></pre>
<h3>Starting a server</h3>
<p>The below command starts the development server.</p>
<pre class="language-python"><code>python manage.py runserver</code></pre>
<h2>Django MVT</h2>
<p>Django follows MVT(Model, View, Template) architecture.</p>
<h3>Sample Django Model</h3>
<p>The model represents the schema of the database.</p>
<pre class="language-python"><code>from django.db import models

class Product(models.Model): # Product is the name of our model
    product_id=models.AutoField</code></pre>
<h3>Sample views.py</h3>
<p>View decides what data gets delivered to the template.</p>
<pre class="language-python"><code>from django.http import HttpResponse

def index(request):
    return HttpResponse("Django CodeWithHarry Cheatsheet")</code></pre>
<h3>Sample HTML Template</h3>
<p>A sample .html file that contains HTML, CSS and Javascript.</p>
<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
    &lt;meta charset="UTF-8"&gt;
    &lt;meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;
    &lt;meta http-equiv="X-UA-Compatible" content="ie=edge"&gt;
    &lt;title&gt;CodeWithHarry Cheatsheet&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;h1&gt;This is a sample template file.&lt;/h1&gt;
&lt;/body&gt;
&lt;/html&gt;</code></pre>
<h2>Views in Django</h2>
<h3>Sample Function-Based Views</h3>
<p>A python function that takes a web request and returns a web response.</p>
<pre class="language-python"><code>from django.http import HttpResponse

def index(request):
    return HttpResponse("This is a function based view.")</code></pre>
<h3>Sample Class-Based Views</h3>
<p>Django's class-based views provide an object-oriented way of organizing your view code.</p>
<pre class="language-python"><code>from django.views import View

class SimpleClassBasedView(View):
    def get(self, request):
        pass # Code to process a GET request</code></pre>
<h2>URLs in Django</h2>
<p>Set of URL patterns to be matched against the requested URL.</p>
<h3>Sample urls.py file1</h3>
<pre class="language-python"><code>from django.contrib import admin
from django.urls import path
from . import views

urlPatterns = [
    path('admin/', admin.site.urls),
    path('', views.index, name='index'),
    path('about/', views.about, name='about'),
]</code></pre>
<h3>Sample urls.py file2</h3>
<pre class="language-python"><code>from django.urls import include, path

urlpatterns = [
    # ... snip ...
    path('community/', include('aggregator.urls')),
    path('contact/', include('contact.urls')),
    # ... snip ...
]</code></pre>
<h2>Forms in Django</h2>
<p>Similar to HTML forms but are created by Django using the form field.</p>
<h3>Sample Django form</h3>
<pre class="language-python"><code>from django import forms

# creating a form
class SampleForm(forms.Form):
    name = forms.CharField()
    description = forms.CharField()</code></pre>
<p>&lt;|AD|&gt;</p>
<h2>Apps in Django</h2>
<p>Apps in Django are like independent modules for different functionalities.</p>
<h3>Creating an app</h3>
<pre class="language-python"><code>python manage.py startapp AppName</code></pre>
<h3>Listing app in the settings.py</h3>
<p>After creating an app, we need to list the app name in INSTALLED_APPS</p>
<pre class="language-python"><code>INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'AppName'
]</code></pre>
<h2>Templates in Django</h2>
<p>Used to handle dynamic HTML files separately.</p>
<h3>Configuring templates in settings.py</h3>
<pre class="language-python"><code>TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': ["templates"],
        'APP_DIRS': True,
        'OPTIONS': {
            # some options here
        },
    },
]</code></pre>
<h3>Changing the views.py file</h3>
<p>A view is associated with every URL. This view is responsible for displaying the content from the template.</p>
<pre class="language-python"><code>def index(request):
    return render(request, 'index.html') #render is used to return the template</code></pre>
<h3>Sample template file</h3>
<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
    &lt;meta charset="UTF-8"&gt;
    &lt;title&gt;Template is working&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;h1&gt;This is a sample django template.&lt;/h1&gt;
&lt;/body&gt;
&lt;/html&gt;</code></pre>
<h2>Migrations in Django</h2>
<p>Migrations are Django's way of updating the database schema according to the changes that you make to your models.</p>
<h3>Creating a migration</h3>
<p>The below command is used to make migration (create files with information to update database) but no changes are made to the actual database.</p>
<pre class="language-python"><code>python manage.py makemigrations
</code></pre>
<h3>Applying the migration</h3>
<p>The below command is used to apply the changes to the actual database.</p>
<pre class="language-python"><code>python manage.py migrate</code></pre>
<h2>Admin interface in Django</h2>
<p>Django comes with a ready-to-use admin interface.</p>
<h3>Creating the admin user</h3>
<pre class="language-python"><code>python manage.py createsuperuser</code></pre>
<h2>Page Redirection</h2>
<p>Redirection is used to redirect the user to a specific page of the application on the occurrence of an event.</p>
<h3>Redirect method</h3>
<pre class="language-python"><code>from django.shortcuts import render, redirect

def redirecting(request):
    return redirect("https://www.codewithharry.com")</code></pre>
<p>&nbsp;</p>
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Django Cheatsheet

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