When given a csv of the games, find the players from each game and update their ratings based on a calculation.
This should take the current_rating and move it into old_rating, run the calculations, then save it to the current_rating for each player using Transactions.
When given a csv of the games, find the players from each game and update their ratings based on a calculation.
This should take the current_rating and move it into old_rating, run the calculations, then save it to the current_rating for each player using Transactions.