lib/Database/PostgreSQL/Opium.hs

@@ -5,7 +5,6 @@
 module Database.PostgreSQL.Opium
     -- * Connection Management
   ( Connection
-  , ConnectionError
   , connect
   , close
     -- * Queries
@@ -41,7 +40,7 @@ import Database.PostgreSQL.LibPQ (Result)
 import qualified Data.Text.Encoding as Encoding
 import qualified Database.PostgreSQL.LibPQ as LibPQ
 
-import Database.PostgreSQL.Opium.Connection (Connection, ConnectionError, connect, close, withRawConnection)
+import Database.PostgreSQL.Opium.Connection (Connection, connect, close, withRawConnection)
 import Database.PostgreSQL.Opium.Error (Error (..), ErrorPosition (..))
 import Database.PostgreSQL.Opium.FromField (FromField (..), RawField (..))
 import Database.PostgreSQL.Opium.FromRow (FromRow (..), ColumnTable)

lib/Database/PostgreSQL/Opium/Connection.hs

@@ -1,10 +1,8 @@
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE OverloadedRecordDot #-}
-{-# LANGUAGE OverloadedStrings #-}
 
 module Database.PostgreSQL.Opium.Connection
   ( Connection
-  , ConnectionError
   , unsafeWithRawConnection
   , withRawConnection
   , connect
@@ -12,21 +10,15 @@ module Database.PostgreSQL.Opium.Connection
   ) where
 
 import Control.Concurrent.MVar (MVar, newMVar, modifyMVar_, withMVar)
-import Data.Maybe (fromMaybe)
+import Data.ByteString (ByteString)
-import Data.Text (Text)
-import Database.PostgreSQL.LibPQ (ConnStatus (..))
 import GHC.Stack (HasCallStack)
 
-import qualified Data.Text.Encoding as Encoding
 import qualified Database.PostgreSQL.LibPQ as LibPQ
 
 newtype Connection = Connection
   { rawConnection :: MVar (Maybe LibPQ.Connection)
   } 
 
-newtype ConnectionError = ConnectionError Text
-  deriving (Show)
-
 withRawConnection
   :: HasCallStack
   => (Maybe LibPQ.Connection -> IO a)
@@ -43,18 +35,11 @@ unsafeWithRawConnection f = withRawConnection $ \case
   Nothing -> error "raw connection is missing! perhaps the connection was already closed."
   Just rawConn -> f rawConn
 
-connect :: Text -> IO (Either ConnectionError Connection)
+connect :: ByteString -> IO Connection
 connect connectionString = do
-  -- Appending the client_encoding setting overrides any previous setting in the connection string.
+  rawConn <- LibPQ.connectdb connectionString
-  -- We set the client encoding here to make sure we can use it below for decoding connection
+
-  -- error messages.
+  Connection <$> newMVar (Just rawConn)
-  rawConn <- LibPQ.connectdb $ Encoding.encodeUtf8 $ connectionString <> " client_encoding=UTF8"
-  status <- LibPQ.status rawConn
-  if status == ConnectionOk then
-    Right . Connection <$> newMVar (Just rawConn)
-  else do
-    rawError <- fromMaybe "" <$> LibPQ.errorMessage rawConn
-    pure $ Left $ ConnectionError $ Encoding.decodeUtf8Lenient rawError
 
 close :: Connection -> IO ()
 close conn = modifyMVar_ conn.rawConnection $ \case

opium.cabal

@@ -20,7 +20,7 @@ name:               opium
 -- PVP summary:     +-+------- breaking API changes
 --                  | | +----- non-breaking API additions
 --                  | | | +--- code changes with no API change
-version:            1.1.0.0
+version:            1.0.0.0
 
 -- A short (one-line) description of the package.
 -- synopsis:
@@ -126,7 +126,6 @@ test-suite opium-test
         base,
         opium,
         bytestring,
-        containers,
         hspec,
         postgresql-libpq,
         time,

test/SpecHook.hs

@@ -8,6 +8,7 @@ import Test.Hspec (Spec, SpecWith, around)
 import Text.Printf (printf)
 
 import qualified Data.Text as Text
+import qualified Data.Text.Encoding as Encoding
 
 import qualified Database.PostgreSQL.Opium as Opium
 
@@ -19,7 +20,7 @@ setupConnection = do
   Just dbPort <- lookupEnv "DB_PORT"
 
   let dsn = printf "host=localhost user=%s password=%s dbname=%s port=%s" dbUser dbPass dbName dbPort
-  Right conn <- Opium.connect $ Text.pack dsn
+  conn <- Opium.connect $ Encoding.encodeUtf8 $ Text.pack dsn
 
   Right _ <- Opium.execute_ "DROP TABLE IF EXISTS person" conn
   Right _ <- Opium.execute_ "CREATE TABLE person (name TEXT NOT NULL, age INT NOT NULL, score DOUBLE PRECISION NOT NULL, motto TEXT)" conn