A simple Django view that handles both GET and POST requests

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Tags: python

Below is a simple Django view that handles both GET and POST requests. This view will render a basic HTML form on a GET request and process the form submission on a POST request:

First, let's create a Django model called Message in models.py:

from django.db import models

class Message(models.Model):
    content = models.TextField()

Now, we'll handle the view logic. Create or update a views.py file:

from django.shortcuts import render, redirect
from .models import Message

def message_view(request):
    if request.method == "POST":
        content = request.POST.get('content')
        Message.objects.create(content=content)
        return redirect('message_view')

    return render(request, 'message_form.html')

Next, let's create a template message_form.html inside your app's templates directory:

<!DOCTYPE html>
<html>
<head>
    <title>Message Form</title>
</head>
<body>
    <form method="post">
        {% csrf_token %}
        <textarea name="content" placeholder="Enter your message"></textarea><br>
        <button type="submit">Submit</button>
    </form>
</body>
</html>

Update your urls.py to include the view:

from django.urls import path
from . import views

urlpatterns = [
    path('message/', views.message_view, name='message_view'),
]

Ensure you have added your app and the django.middleware.csrf.CsrfViewMiddleware middleware in the INSTALLED_APPS and MIDDLEWARE settings respectively in your settings.py; Run migrations to create the Message model in your database:
```
python3 manage.py makemigrations
python3 manage.py migrate
```
Start the development server:
```
python3 manage.py runserver 0.0.0.0:80
```
Now, if you navigate to http://127.0.0.1:8000/message/, you should see a simple form. Upon submission, the form content will be saved to the database.

[Without Model]

Create or update a views.py file:

from django.shortcuts import render
from django.http import HttpResponse

def message_view(request):
    if request.method == "POST":
        message = request.POST.get('content')

        # Convert the message to uppercase
        processed_message = message.upper()

        return HttpResponse(f"Received message: {processed_message}")

    return render(request, 'message_form.html')

Let's reuse the template message_form.html from the previous example inside your app's templates directory:

<!DOCTYPE html>
<html>
<head>
    <title>Message Form</title>
</head>
<body>
    <form method="post">
        {% csrf_token %}
        <textarea name="content" placeholder="Enter your message"></textarea><br>
        <button type="submit">Submit</button>
    </form>
</body>
</html>

Update your urls.py to include the view:

from django.urls import path
from . import views

urlpatterns = [
    path('message/', views.message_view, name='message_view'),
]

Ensure you have added the django.middleware.csrf.CsrfViewMiddleware middleware in the MIDDLEWARE setting of your settings.py; Start the development server:
```
python manage.py runserver
```
Now, when you navigate to http://127.0.0.1:8000/message/ and submit the form, you will receive a response showing the message you submitted without saving it to a database.

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