How to use Django on Google App Engine / Python

environment

Mac
Python2.7
Google App Engine SDK for Python

It is work in the environment where.

Creating a Django app

First, create a project. Here, it is called gaedjango.

If you use django included in the SDK, it will be as follows. For other environments, please modify accordingly.

$ export PYTHONPATH='/usr/local/google_appengine/lib/django-1.5/'
$ /usr/local/google_appengine/lib/django-1.5/django/bin/django-admin.py startproject gaedjangoapp

A project will be created in the gaedjangoapp directory.

Creating an app.yaml file

The Google App Engine application is a file called app.yaml You need to configure the application. Python Application Configuration with app.yaml

`app.yaml`


application: gaedjangoapp
version: 1
runtime: python27
api_version: 1
threadsafe: yes

libraries:
- name: django
  version: "1.5"

builtins:
- django_wsgi: on

appengine_config.py When using Django of SDK, set PYTHONPATH.

For Django1.5, also set DJANGO_SETTINGS_MODULE.

`appengine_config.py`


# -*- coding: utf-8 -*-
import os
import sys

if os.environ.get('SERVER_SOFTWARE','').startswith('Dev'):
    sys.path.append('/usr/local/google_appengine/lib/django-1.5/')

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "gaedjangoapp.settings")

Start development server

Usually in django apps,

$ python manage.py runserver

Start the development server with This time it's Google App Engine, so

$ dev_appserver.py .

Start with.

In this state, if you access [http: // localhost: 8080](http: // localhost: 8080), It worked! And the screen in the initial state is displayed.

Creating a hello app

Create an app that displays Hello World.

$ python manage.py startapp hello

Will create an empty app in the hello directory.

Next, make hello / view.py as follows.

`hello/view.py`


# -*- coding:utf-8 -*-

from django.http import HttpResponse
def index(request):
    return HttpResponse("Hello, world.")

Next, set urls.py.

`gaedjangoapp/urls.py`


from django.conf.urls import patterns, include, url

urlpatterns = patterns('',
    (r'^$', 'gaedjangoapp.hello.views.index'),
)

Finally, add the application to settings.py.

`gaedjangoapp.settings.py`


INSTALLED_APPS = (
    ~~~~~
    # Uncomment the next line to enable the admin:
    # 'django.contrib.admin',
    # Uncomment the next line to enable admin documentation:
    # 'django.contrib.admindocs',
    'hello',
)

In this state, if you access [http: // localhost: 8080](http: // localhost: 8080), Hello, world. It will be displayed.