The web development server that comes bundled with Flask is not robust, secure, or efficient enough to work in a production environment. In this chapter, production deployment options for Flask applications are examined.
Regardless of the hosting method used, there are a series of tasks that must be carried out when the application is installed on a production server. These include the creation or update of the database tables.
Having to run these tasks manually each time the application is installed or upgraded is error prone and time consuming. Instead, a command that performs all the required tasks can be added to flasky.py.
Example 17-1 shows a
deploy command implementation that is appropriate for Flasky.
"""Run deployment tasks."""
# migrate database to latest revision
# create or update user roles
# ensure all users are following themselves
The functions invoked by this command were all created before; they are just invoked all together from a single command to simplify the deployment of the application.
If you have cloned the application’s Git repository on GitHub, you can run
git checkout 17a to check out this version of the application.
These functions are all designed in a way that causes no problems if they are executed multiple ...