mongodb/doc/Example.hs

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{-# LANGUAGE OverloadedStrings #-}
import Database.MongoDB
import Control.Monad.Trans (liftIO)
main = do
pipe <- runIOE $ connect (host "127.0.0.1")
e <- access pipe master "baseball" run
close pipe
print e
run = do
clearTeams
insertTeams
printDocs "All Teams" =<< allTeams
printDocs "National League Teams" =<< nationalLeagueTeams
printDocs "New York Teams" =<< newYorkTeams
clearTeams = delete (select [] "team")
insertTeams = insertMany "team" [
["name" =: u"Yankees", "home" =: ["city" =: u"New York", "state" =: u"NY"], "league" =: u"American"],
["name" =: u"Mets", "home" =: ["city" =: u"New York", "state" =: u"NY"], "league" =: u"National"],
["name" =: u"Phillies", "home" =: ["city" =: u"Philadelphia", "state" =: u"PA"], "league" =: u"National"],
["name" =: u"Red Sox", "home" =: ["city" =: u"Boston", "state" =: u"MA"], "league" =: u"American"] ]
allTeams = rest =<< find (select [] "team") {sort = ["home.city" =: (1 :: Int)]}
nationalLeagueTeams = rest =<< find (select ["league" =: u"National"] "team")
newYorkTeams = rest =<< find (select ["home.state" =: u"NY"] "team") {project = ["name" =: (1 :: Int), "league" =: (1 :: Int)]}
printDocs title docs = liftIO $ putStrLn title >> mapM_ (print . exclude ["_id"]) docs