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Merge pull request #21 from fujimura/update-example-hs

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Update example and readme
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Sergei Lebedev 2014-03-02 13:15:17 +03:00
commit e8f6341756
2 changed files with 16 additions and 5 deletions
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8
README.md
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@ -1,9 +1,9 @@
This is the Haskell MongoDB driver (client). [MongoDB](http://www.mongodb.org) is a free, scalable, fast, document database management system. This driver lets you connect to a MongoDB server, and update and query its data. It also lets you do adminstrative tasks, like create an index or look at performance statistics.
### Documentation
* [Quick example](http://github.com/TonyGen/mongoDB-haskell/blob/master/doc/Example.hs)
* [Tutorial](http://github.com/TonyGen/mongoDB-haskell/blob/master/doc/tutorial.md)
* [Quick example](http://github.com/selectel/mongoDB-haskell/blob/master/doc/Example.hs)
* [Tutorial](http://github.com/selectel/mongoDB-haskell/blob/master/doc/tutorial.md)
* [Driver API](http://hackage.haskell.org/package/mongoDB)
* [MapReduce example](http://github.com/TonyGen/mongoDB-haskell/blob/master/doc/map-reduce-example.md)
* [Driver design](http://github.com/TonyGen/mongoDB-haskell/blob/master/doc/Article1.md)
* [MapReduce example](http://github.com/selectel/mongoDB-haskell/blob/master/doc/map-reduce-example.md)
* [Driver design](http://github.com/selectel/mongoDB-haskell/blob/master/doc/Article1.md)
* [MongoDB DBMS](http://www.mongodb.org)

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doc/Example.hs
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{-# LANGUAGE OverloadedStrings, ExtendedDefaultRules #-}
import Database.MongoDB
import Database.MongoDB (Action, Document, Document, Value, access,
close, connect, delete, exclude, find,
host, insertMany, master, project, rest,
runIOE, select, sort, (=:))
import Control.Monad.Trans (liftIO)
main :: IO ()
main = do
pipe <- runIOE $ connect (host "127.0.0.1")
e <- access pipe master "baseball" run
close pipe
print e
run :: Action IO ()
run = do
clearTeams
insertTeams
@ -16,18 +21,24 @@ run = do
nationalLeagueTeams >>= printDocs "National League Teams"
newYorkTeams >>= printDocs "New York Teams"
clearTeams :: Action IO ()
clearTeams = delete (select [] "team")
insertTeams :: Action IO [Value]
insertTeams = insertMany "team" [
["name" =: "Yankees", "home" =: ["city" =: "New York", "state" =: "NY"], "league" =: "American"],
["name" =: "Mets", "home" =: ["city" =: "New York", "state" =: "NY"], "league" =: "National"],
["name" =: "Phillies", "home" =: ["city" =: "Philadelphia", "state" =: "PA"], "league" =: "National"],
["name" =: "Red Sox", "home" =: ["city" =: "Boston", "state" =: "MA"], "league" =: "American"] ]
allTeams :: Action IO [Document]
allTeams = rest =<< find (select [] "team") {sort = ["home.city" =: 1]}
nationalLeagueTeams :: Action IO [Document]
nationalLeagueTeams = rest =<< find (select ["league" =: "National"] "team")
newYorkTeams :: Action IO [Document]
newYorkTeams = rest =<< find (select ["home.state" =: "NY"] "team") {project = ["name" =: 1, "league" =: 1]}
printDocs :: String -> [Document] -> Action IO ()
printDocs title docs = liftIO $ putStrLn title >> mapM_ (print . exclude ["_id"]) docs