Frequently asked questions

All libraries that operate on file objects such as zipfile or reportlab will also work work with file-like objects. If you dynamically generate such an object you create a buffer instance and then use django's FileResponse to return a file-like object.

import io
from django.http import FileResponse
from reportlab.pdfgen import canvas

def my_view(request):
    buffer = io.BytesIO()
    c =  canvas.Canvas(buffer)
    c.drawString(100, 100, "Hello world.")
    c.showPage()
    c.save()
    buffer.seek(0)
    return FileResponse(buffer, as_attachment=True, filename='hello.pdf')

For more details see the official django documentation

Set the auto_now_add parameter to True. In this case the field value is only set when the record ist created and does not get changed on updates. If you want to keep track of when the record has last been updated you must use auto_now.

created = models.DateField(auto_now_add=True)
last_modified = models.DateField(auto_now=True)

Use the "date" filter:

<p class="tag is-info">Published: {{article.created|date:"d/m/Y"}}</p>

You probably have just created a new app within your project but forgot to register the app in settings.py. Add your app to INSTALLED_APPS like so:

INSTALLED_APPS = [
    'mynewapp.apps.MynewappConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]