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#FSND Project 2 - Tournament Results Originally forked from fullstack-nanodegree-vm.

This project demonstrates creating and updating a data model within a relational database as a persistence layer as well as how to push some logic down to the RDBMS for simplifying app-level logic.

The project was built using the following software and their versions.

• Virtual Box - v4.3.28
• Vagrant - v1.7.2

There have been some known issues with Vagrant and the versions of curl on some operating systems. Using a preview build of MacOS X 10.10.4 required pulling down the box image first and adding it to the local Vagrant environment. You can try pulling the box down manually via a browser or curl and then adding the box before running vagrant up per the Usage instructions.

curl http://cloud-images.ubuntu.com/vagrant/trusty/current/trusty-server-cloudimg-i386-vagrant-disk1.box > ubuntu_trusty32.box

vagrant add ubuntu_trusty32.box ubuntu/trusty32

Bring the Vagrant managed VM online

vagrant up

Connect to the system via SSH

vagrant ssh

Change to the directory within the VM that's mapped to our project files.

cd /vagrant

First, bootstrap the Tournament PostgreSQL database using the provided SQL script.

psql -f tournament.sql

Run the test Python script that manipulates the state of the tournament within the database and validates Swiss Pairings.

python tournament_test.sql

If everything works, you should see valid output resembling:

1. Old matches can be deleted.
2. Player records can be deleted.
3. After deleting, countPlayers() returns zero.
Adding player "Chandra Nalaar"
4. After registering a player, countPlayers() returns 1.
Adding player "Markov Chaney"
Adding player "Joe Malik"
Adding player "Mao Tsu-hsi"
Adding player "Atlanta Hope"
5. Players can be registered and deleted.
Adding player "Melpomene Murray"
Adding player "Randy Schwartz"
6. Newly registered players appear in the standings with no matches.
Adding player "Bruno Walton"
Adding player "Boots O'Neal"
Adding player "Cathy Burton"
Adding player "Diane Grant"
7. After a match, players have updated standings.
Adding player "Twilight Sparkle"
Adding player "Fluttershy"
Adding player "Applejack"
Adding player "Pinkie Pie"
8. After one match, players with one win are paired.
Success!  All tests pass!

In identifying the approach for creating the Standings and Swiss Pairings, I consulted a few sources.

• PostgreSQL docs: http://www.postgresql.org/docs/9.3/static/index.html
• Pyscopg Basic Usage: http://initd.org/psycopg/docs/usage.html
• PostgreSQL row_number() example: http://stackoverflow.com/questions/3397121/how-to-show-row-numbers-in-postgresql-query