hasql wants to rowParse text not bytestring

src/App.hs

@@ -1,5 +1,5 @@
 {-# LANGUAGE FlexibleContexts #-}
-module App (app) where
+module App (runApp, app) where
 
 import Control.Monad (join)
 import Data.Monoid ( (<>) )
@@ -8,7 +8,7 @@ import Control.Applicative
 import Control.Monad.IO.Class (liftIO, MonadIO)
 
 import Data.Text hiding (map)
-import Data.Maybe (listToMaybe, fromMaybe)
+import Data.Maybe (fromMaybe)
 import Text.Regex.TDFA ((=~))
 import Data.Ord (comparing)
 import Data.Ranged.Ranges (emptyRange)
@@ -33,6 +33,10 @@ import RangeQuery
 import PgStructure
 import Auth
 
+runApp :: H.Postgres -> H.SessionSettings -> Application
+runApp pg sess req respond =
+  respond =<< H.session pg sess (app req)
+
 app :: Request -> H.Session H.Postgres IO Response
 app req =
   case (path, verb) of
@@ -64,9 +68,9 @@ app req =
                   . whereT qq
                   $ selectStar qt
                 )
-        row <- H.tx Nothing $ listToMaybe <$> H.list select
+        row <- H.tx Nothing $ H.single select
         let (tableTotal, queryTotal, body) =
-              fromMaybe (0, 0, Just "" :: Maybe ByteString) row
+              fromMaybe (0, 0, Just "" :: Maybe Text) row
             from = fromMaybe 0 $ rangeOffset <$> range
             to = from+queryTotal
             contentRange = contentRangeH from to tableTotal

src/Main.hs

@@ -8,7 +8,6 @@ import Middleware
 
 import Control.Monad (unless)
 import Data.String.Conversions (cs)
-import Network.Wai
 import Network.Wai.Middleware.Cors (cors)
 import Network.Wai.Handler.Warp hiding (Connection)
 import Network.Wai.Middleware.Gzip (gzip, def)
@@ -32,26 +31,22 @@ main = do
   Prelude.putStrLn $ "Listening on port " ++ (show $ configPort conf :: String)
 
 
-  let pgSettings = H.Postgres "localhost" 5432 "postgres" "" "postgres"
+  let pgSettings = H.Postgres "localhost" 5432 "dbapi_test" "" "dbapi_test"
 
   sessSettings <- maybe (fail "Improper session settings") return $
-                    H.sessionSettings 6 30
+                    H.sessionSettings 95 30
 
-  let settings = setPort port
-               . setServerName (cs $ "dbapi/" <> prettyVersion)
-               $ defaultSettings
+  let appSettings = setPort port
+                  . setServerName (cs $ "dbapi/" <> prettyVersion)
+                  $ defaultSettings
       middle =
         (if configSecure conf then redirectInsecure else id)
         . gzip def . cors corsPolicy . clientErrors
         . staticPolicy (only [("favicon.ico", "static/favicon.ico")]) in
 
-    runSettings settings $ middle (runApp pgSettings sessSettings)
+    runSettings appSettings $ middle (runApp pgSettings sessSettings)
  --     . authenticated (cs $ configAnonRole conf) $ app
 
   where
     describe = progDesc "create a REST API to an existing Postgres database"
     prettyVersion = intercalate "." $ map show $ versionBranch version
-
-runApp :: H.Postgres -> H.SessionSettings -> Application
-runApp pg sess req respond =
-  respond =<< H.session pg sess (app req)

src/PgQuery.hs

@@ -74,7 +74,7 @@ countRows t =
 
 asJsonWithCount :: StatementT
 asJsonWithCount (sql, params) = (
-    "count(t), array_to_json(array_agg(row_to_json(t)))::character varying  from (" <> sql <> ") t"
+    "count(t), array_to_json(array_agg(row_to_json(t)))::character varying from (" <> sql <> ") t"
   , params
   )