added my database experiments

1 files changed, 36 insertions, 0 deletions

diff --git a/fooes.hs b/fooes.hs
new file mode 100644
index 000000000..80f4b7dc5
--- /dev/null
+++ b/fooes.hs
@@ -0,0 +1,36 @@
+{-# LANGUAGE QuasiQuotes, TypeFamilies, GeneralizedNewtypeDeriving, TemplateHaskell,
+             OverloadedStrings, GADTs, FlexibleContexts #-}
+import Database.Persist.TH
+import Database.Persist.Sqlite (runSqlite)
+import Control.Monad.IO.Class (liftIO)
+import Control.Monad
+import Database.Esqueleto hiding (Key)
+
+share [mkPersist sqlSettings, mkSave "entityDefs", mkMigrate "migrateAll"] [persistLowerCase|
+CachedKey
+  key String
+  UniqueKey key
+  deriving Show
+
+AssociatedFiles
+  key CachedKeyId Eq
+  file FilePath
+  UniqueKeyFile key file
+  deriving Show
+|]
+
+main :: IO ()
+main = runSqlite "foo.db" $ do
+	runMigration migrateAll
+
+	forM_ [1..30000] $ \i -> do
+		k <- insert $ CachedKey (show i)
+		liftIO $ print k
+		insert $ AssociatedFiles k (show i)
+
+		[(k2)] <- select $ from $ \k -> do
+			where_ (k ^. CachedKeyKey ==. val (show i))
+			return (k ^. CachedKeyId)
+		liftIO $ print (2, k2)
+		delete $ from $ \f -> do
+			where_ (f ^. AssociatedFilesKey ==. k2)