This module aims to make mapping between algebraic data types and bson documents easy.

You can also generate documents with selectFields, which takes a list of functions names that of type a -> b and returns a function of type a -> Document.

Example:

import Data.Bson.Mapping
import Data.Time.Clock
import Data.Data (Typeable)

data Post = Post { time :: UTCTime
                 , author :: String
                 , content :: String
                 , votes :: Int
                 }
          deriving (Show, Read, Eq, Ord, Typeable)
$(deriveBson ''Post)

main :: IO ()
main = do
  now <- getCurrentTime
  let post = Post now "francesco" "lorem ipsum" 5
  (fromBson (toBson post) :: IO Post) >>= print
  print $ toBson post
  print $ $(selectFields ['time, 'content]) post