Deploy to heroku in Django !!!(2018)

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Environment Information (anaconda Environment)

Windows 10 64 bit
python 3.6.6
django 2.0.6

※ python 3.6.7 version does not work well the present (2018/11/18).

Deployment steps

Things need to be prepared

Pre-developed application that to be deployed
Github account
Heroku account
Install some important modules
- Django-toolbelt
- Whitenoise

pip install django-toolbelt
pip install whitenoise

Create important files

runtime.txt
Procfile
requirements.txt
.gitignore

・runtime.txt

This is the file that tells the Python version to Heroku. Let's check the version of python by typing python --version at the command prompt.

runtime.txt

python-3.6.6

・Procfile

Procfile is the file in which contains the command to start the heroku process. Let's create the following file.

Procfile

web: gunicorn procjectName.wsgi --log-file -

※ Since the projectName of the django application under development is included in the place called projectName, please change each of them.

※ Example: Project name is my_project

web: gunicorm my_project.wsgi --log-file -

gunicorn is a python library that simply connects web servers and web applications. If you have not installed it, install it with the pip command (or conda command for anaconda). You can check with pip list to make sure if it is installed or not.

pip list pip install gunicorn

・requirements.txt

requirements.txt is a file that tells heroku, "I will use this module and libraries!"

You can create it with the following command. Let's type in the hierarchy of the project folder.

Command Prompt

pip freeze > requirements.txt

pip freeze is a command to output with the specific version of the library that you are using.

>requirements.txt is a command to create by inputting the output on the left side of the inequality into the file on the right side. So it's all good with the above command.

・.gitignore

Please use .gitignore (with the dot) in git described later.Simple explanation is that I want to push my files to the service called git, but files that i don't want to that be declare in .gitignore. (For example, the setting file for the development environment described later)

.gitignore

<your_venv>
__pycache__
staticfiles
local_settings.py
db.sqlite3
*.py[co]

Change/Add `setting` file

projectName/settings.py (Change the existing file)
projectName/local_settings.py (Create new)

projectName/setting.py

DEBUG = False

try:
    from .local_settings import *
except ImportError:
    pass

if not DEBUG:
    import django_heroku
    django_heroku.settings(locals())

Let's add this to the bottom of the existing setting.py DEBUG mode will be False in development.

projectName/local_settings.py

This is a code describing the development database and debugging. Let's Create New → Copy → Save.

projectName/lacal_settings.py

import os
BASE_DIR = os.path.dirname(os.path.dirname(__file__))

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}

DEBUG = True

Using git

To deploy to heroku I will send my file to github service and use git.

Let's install the software from the following site to use the git command via the command line

Install git command here

Type the following commands:

git init
git config user.name "username"
git config user.email "mailaddress"
git add -A .
git commit -m "first commit"

Please enter your user name and the mail address. Do not forget the last . (Dot) in the fourth line.

Lastly, deploy to Heroku

Type in the following commands:

heroku login
heroku create <Your user name>
git push heroku master
heroku ps:scale web=1
heroku run python manage.py migrate
heroku run python manage.py createsuperuser
heroku open

heroku run python manage.py migrate describe the heroku version of migrate (database update) you have been doing.

heroku run python manage.py createsuperuser is a command to log in to django's administration site. Let's create an account here.

By entering heroku open, heroku's web application that you deployed without permission opens in your browser. You can enter url of web application created manually from browser.