Author: John Au-Yeung

To filter query objects by date range in Python Django, we can use the filter method.

For instance, we write

Sample.objects.filter(date__range=["2021-01-01", "2021-01-31"])

to call objects.filter with the date__range parameter set to a list with the date range with the strings as the date values.

date is the column name we’re filtering by.

To add Python Django MEDIA_URL and MEDIA_ROOT, we add them to our URL config to serve uploaded files when developing our app locally.

For instance, we write

from django.conf import settings
from django.conf.urls.static import static

urlpatterns = patterns('',
    # ... the rest of your URLconf goes here ...
) + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

to call static with settings.MEDIA_URL and document_root=settings.MEDIA_ROOT to add the route to expose the uploaded files when developing our app locally.

To enable CORS on Python Django REST Framework, we add the django-cors-headers package.

To install it, we run

python -m pip install django-cors-headers

Then we add

INSTALLED_APPS = (
    ...
    'corsheaders',
    ...
)

in INSTALLED_APPS.

And add

MIDDLEWARE = [
    ...,
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.common.CommonMiddleware',
    ...,
]

in middleware.

Then we add

CORS_ALLOWED_ORIGINS = [
    'http://localhost:3030',
]

in our Django’s config to allow CORS in the hosts listed.

To override and extend basic Python Django admin templates, we can use the extends helper.

For instance, we write

{% extends "admin:admin/index.html" %}

{% block sidebar %}
    {{block.super}}
    <div>
        <h1>Extra links</h1>
        <a href="/admin/extra/">My extra link</a>
    </div>
{% endblock %}

to use extends with the admin template file we want to extend from.

And then we add our own items below the extends block.