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rating-db

In this guide we explain how you can download and restore the ratings database. There’s also a short description of its main tables.

How to use it

1. Download backup

Backups are available at https://pub-5200ce7fb4b64b5ea3b6b0b0f05cfcd5.r2.dev/YYYY-MM-DD_rating.backup (replace YYYY-MM-DD with a real date from the past 30 days).

You can run download.sh to download a backup from yesterday to rating.backup (we create backups around 23:00 UTC, so a backup for today might not exist):

./download.sh

2. Run docker-compose up

Rename the downloaded file to rating.backup and put into the same folder as docker-compose.yml and restore.sh from this repository. Optionally change user, password, and port variables in docker-compose.yml (e.g., if you run already a Postgres instance locally and want this container to use another port).

Run

docker-compose up

You should now be able to connect to the database using this URI:

postgresql://postgres:password@localhost:5432/postgres

3. Set up services

For rating-b (recalculations), edit .env. E.g.:

DJANGO_POSTGRES_DB_HOST=localhost
DJANGO_POSTGRES_DB_PORT=5432
DJANGO_POSTGRES_DB_USER=postgres
DJANGO_POSTGRES_DB_PASSWORD=password
DJANGO_POSTGRES_DB_NAME=postgres
DJANGO_SECRET_KEY=asdf

For rating-ui (web UI), you can either set the DATABASE_URL env variable (e.g., DATABASE_URL=postgresql://postgres:password@localhost:5432/postgres rails s) or update config/database.yml.

SQLite

Alternatively, you can download sqlite databases:

They are split by schema: public and b (see below). They will not work for running rating-b or rating-ui, but might be more suitable for ad-hoc data exploration.

What’s in there

Two schemas: b and public. public has data about tournaments, results, and rosters that we sync from rating.chgk.info. rating-b calculates ratings and stores them in the b schema.

public

Most of these tables are populated by rating-importer using data from rating.chgk.info. Ignore auth_*, django_*, and schema_migrations tables.

Table Name Comment
base_rosters
models rating-ui internal table, list of models (schemas) in the database
ndcg WIP: we’ll use it to compare models in the future
players
rating_individual_old We use ratings from April 2020 as a starting point.
rating_individual_old_details We use ratings from April 2020 as a starting point.
rosters
seasons
teams
tournament_results
tournament_rosters
tournaments
towns

b

rating-b’s tables are in its models.py.