multiple string queries on a single table - sql

Question

making a site for game trailers and on the front page I organize the games in terms of their category, so I end up doing this (rails):
def index
#newGames = Game.order("created_at DESC").limit(3)
#casualGames = Game.where("category = 'casual'").limit(9)
#actionGames = Game.where("category = 'action'").limit(8)
#strategyGames = Game.where("category = 'strategy'").limit(9)
#adventureGames = Game.where("category = 'adventure'").limit(8)
#puzzleGames = Game.where("category = 'puzzle'").limit(9)
end
Is there a way to accomplish the same thing but without making 6 separate queries on the sable table?
Thanks

Answer 1

As your search parameters are different querying DB multiple times is unavoidable. However you can make your controller skinny. Create a class method in Game class and collect and return everything you need in a hash.
Game.rb
def self.for_index_page
games = {}
games.merge!(new: order("created_at DESC").limit(3))
games.merge!(casual: category_with_limit('casual', 9)
games.merge!(action: category_with_limit('action', 8)
...
end
def self.category_with_limit(category, limit)
where(category: category).limit(limit)
end
GamesController.rb
def index
#games = Game.for_index_page
end
index.erb
<%=#games[:new] %>
<%=#games[:casual] %>
...