I was trying to deploy a django application on Heroku. The official documentation given at https://devcenter.heroku.com/articles/django is very helpful but misses out some details,so i was not able to successfully deploy the django app to heroku by following those steps as is. So, for the benefit of those who may be facing this problem, im outlining the steps i followed to get a django app running on heroku platform.
Im assuming you have already installed the heroku toolbelt and are are able to login to your heroku account from the terminal. If not, have a look at https://devcenter.heroku.com/articles/python#local_workstation_setup.
Please note that this post is aimed at getting you up and running with django on heroku quickly, so i wont be covering stuff like using a production ready webserver for deployment or asynchronous task processing in your apps .With that said, here we go. Lets say, you are creating this heroku hosted app in a folder called Foo on your local machine. For every new django project you want to host on heroku create a folder for that project and after switching to that folder repeat step 2 onwards.
Step 1. Create folder Foo and move into it
mkdir Foo
cd Foo
Step 2. Create a virtual envirtonment using virtualenv and activate it
virtualenv --no-site-packages venv
source venv/bin/activate
Step 3. Install django and psycopg2 (Python driver for PostgreSQL.Heroku provides each app with a full-featured PostgreSQL database) in your virtual environment
pip install django
pip install psycopg2
Step 4. Create your django project
django-admin.py startproject helloheroku
Step 5. Create a .gitignore file and add venv to it,because we dont want to push our local virtual environment to heroku,it would be automagically created for us 
,as described in the next step.Then,initialize a git repository using git init
Step 6. In order for heroku to be able to replicate our local virtual environment by installing the required python modules we need to create a requirements file as follows
pip freeze > requirements.txt
Step 7. Create a file called Procfile with the following contents.The Procfile specifies how to run the inbuilt django webserver to start our application.
web: python helloheroku/manage.py runserver 0.0.0.0:$PORT --noreload
Step 8. Add our django project,Procfile and the requirements.txt file to the git repo and commit
git add .
git commit -m "first commit"
Step 9. So, now we have our local setup ready for the first push to Heroku. But,before we push we need to create an application on Heroku using the Cedar stack, and then do a git push as shown below.On Heroku, your app will have a url like http://my-app-name.herokuapp.com
heroku create --stack cedar
git push heroku master
If “git push heroku master” gives you an error “heroku does not appear to be a git repository”, run the following command to add heroku as a remote git repository.
git remote add heroku git@heroku.com:my-app-name.git
Step 10. And finally, we can start our application on heroku by issuing the following command
heroku ps:scale web=1
You can now access your app by visiting the url generated for your app by heroku .
Here are some additional tips which would come in handy
1. To check if your webserver process is up on heroku, run the command heroku ps
2. To see the logs generated by the webserver , run the command heroku logs
3. For a database to use with your django application, you can go for the free 5 MB shared postgresql database provided by heroku ( This shared database is to be used for development and staging only, and not recommended for production, for which you should go for a dedicated database ) by issuing the following command
heroku addons:add shared-database:5mb
We can see the url for this database by issuing the command heroku config and looking at the SHARED_DATABASE_URL parameter . This url would be of the format postgres://username:password@hostname/dbname . You can enter these database details in your settings.py and then after comming your changes and doing the git push run heroku run python manage.py syncdb
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