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Split Windows and Linux Configuration

This is part 4 of a 4 part series on how to setup Django locally on Windows and deploy to Heroku.

  1. Introduction
  2. Setup and Run Django+Heroku Locally on Windows
  3. Change Django from SQLite to PostgreSQL
  4. Split Configuration for Windows and Linux (this page)

You may recall from the first page that setting up Django locally on Windows and deplying to Heroku has a problem. If the application uses PostgreSQL, then the configuration between Windows and Linux cannot be the same.

This final part describes how to setup the configuration (requirements) so that Windows and Linux have different requirements.

Two Requirements

The easiest way to specify different requirements is to have two requirements.txt files: one for local development and one for production. Heroku's Python buildpack uses requirements.txt, so unless you want to change the buildpack, the easiest way to set things up is:

  • requirements.txt: production (or staging)
  • devel-requirements.txt: local development

Create a copy of requirements.txt and name it devel-requirements.txt. This is the existing Windows requirements for location development. Then open requirements.txt and replace

-e git+https://github.com/nwcell/psycopg2-windows.git@win64-py34#egg=psycopg2

with

psycopg2==2.6

Commit to Git

Before adding and committing to Git, there are a few things that should not be committed to Git.

Since you cannot direclty create a file name in Windows starting with a period, execute the following to create the .gitignore file:

touch .gitignore

Then either open the file add the following:

*.pyc venv

or paste the full contents of Github's awesome standard .gitignore, adding the line:

venv

Then execute the following to add the files to Git:

git add . && git commit -m "Ficksworkshop is awesome! :)"

At this point, you should store your code in a remote repository. Personally, I use BitBucket because it allows free private repositories - but there are lots of other great alternatives.

Push to Heroku

The final step is to create a Heroku application and push to Heroku. First login to Heroku:

heroku login

Then, in the same folder as the application, exeucte the follow to create a new Heroku application:

heroku apps:create APPNAME

You must rename the application to something unique.

Finally, push your code to Heroku:

git push heroku master

Migrate the Database

Since this is the first time using this database for Django, the tables don't match what Django expects. Just as when running locally, the database needs to be migrated, but this time, using the heroku CLI to run the migration on the server.

heroku run python manage.py migrate

View the Running Application

If everything worked, the application is now running on Heroku. Point your browser to APPNAME.herokuapp.com to see it running.

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