genesluder / dj-optimizely

Database-backed storage for your Optimizaly datafile and utilities for using Rollouts in Django.

dj-optimizely

Introduction

Database-backed storage for your Optimizaly datafile and utilities for using Rollouts in Django.

Features:

• Database-backed storage for Optimizaly datafile
• Webhook endpoint to recieve datafile updates
  • The webhook payload contains the datafile for the primary environment. If the current environment is not the primary environment, the webhook call will trigger a fetch of your current environment's datafile. Only your current environment's datafile is stored locally at this time.
  • On server start the datafile will be initialized via a pull based on the provided datafile url
• Currently only supports Rollouts. Check if a featuee flag is enabled.

Quickstart

Install:

pip install dj-optimizely

Add djoptimizely to INSTALLED_APPS:

INSTALLED_APPS = [
    ...
    'djoptimizely',
    ...
]

Add djoptimizely.middleware.optimizely_middleware to MIDDLEWARE:

MIDDLEWARE = [
    ...
    'djoptimizely.middleware.optimizely_middleware',
    ...
]

Specify additional required settings:

OPTIMIZELY_ENVIRONMENT = 'staging'
OPTIMIZELY_WEBHOOK_SECRET = os.getenv('OPTIMIZELY_WEBHOOK_SECRET')
OPTIMIZELY_DATAFILE_URL = os.getenv('OPTIMIZELY_DATAFILE_URL')

Specify optional callbacks. Both functions take the request as the first parameter:

OPTIMIZELY_USER_ID_CALLBACK = 'myapp.module.get_user_id'
OPTIMIZELY_USER_ATTRIBS_CALLBACK = 'myapp.module.get_user_attribs'

Default callbacks:

def get_user_id_default(request):
    if request.user.is_authenticated:
        return request.user.pk
    else:
        return request.session._get_or_create_session_key()

def get_user_attribs_default(request):
    attribs = {
        'is_authenticated': False,
        'is_staff': False
    }
    if request.user.is_authenticated:
        attribs['is_authenticated'] = True
        if request.user.is_staff:
            attribs['is_staff'] = True
        
    return attribs

Add the webhook to urls.py:

path('webhooks/', include('djoptimizely.urls')),

Check if a feature should be enabled:

from djoptimizely.services import get_feature_enabled

if get_feature_enabled(request, 'cool_stuff'):
    print('Cool!')

Check in a template

{% load djoptimizely_tags %}

{% feature_enabled 'cool_stuff' as show_cool_stuff %}
{% if show_cool_stuff %}
    <p>COOL Stuff!</p>
{% endif %}

Generic view mixin:

If the specified feature_key is not enabled for request.user return a 404

from djoptimizely.mixins import OptimizelyFeatureViewMixin
from django.views.generic.base import TemplateView

class CoolView(OptimizelyFeatureViewMixin, TemplateView):
    feature_key = 'cool_stuff'
    ...