Fix where clause, add count in headers

Main.hs

@@ -70,12 +70,11 @@ app config req respond = do
       ([table], "GET") ->
         if range == Just emptyRange
         then return $ responseLBS status416 [] "HTTP Range error"
-        else responseLBS status200 [json] . rrBody <$>
+        else respondWithRangedResult <$>
           (getRows (show ver) (unpack table) qq range =<< conn)
       (_, _) ->
         return $ responseLBS status404 [] ""
 
-
   respond $ either sqlErrorHandler id r
 
   where
@@ -87,6 +86,13 @@ app config req respond = do
     ver    = fromMaybe 1 $ requestedVersion (requestHeaders req)
     range  = requestedRange (requestHeaders req)
 
+respondWithRangedResult :: RangedResult -> Response
+respondWithRangedResult rr =
+  responseLBS status206 [json, ("Content-Range", "*/" <> (BS.pack . show . rrTotal) rr)] (rrBody rr)
+
+  where
+    json = (hContentType, "application/json")
+
 requestedVersion :: RequestHeaders -> Maybe Int
 requestedVersion hdrs =
   case verStr of

PgQuery.hs

@@ -36,14 +36,16 @@ getRows schema table qq range conn = do
     $ selectStarClause schema table
       <> whereClause qq
       <> limitClause range
+  count <- populateSql conn
+    $ selectCountClause schema table
+      <> whereClause qq
   r <- quickQuery conn query []
+  [[n]] <- quickQuery conn count []
 
-  let body = case r of
-             [[SqlNull]] -> "[]"
-             [[json]]    -> fromSql json
-             _           -> ""
-  return $ RangedResult 0 0 0 body
-
+  return $ case r of
+             [[SqlNull]] -> RangedResult 0 0 0 ""
+             [[json]]    -> RangedResult 0 0 (fromSql n) (fromSql json)
+             _           -> RangedResult 0 0 0 ""
 
 whereClause :: Net.Query -> QuotedSql
 whereClause qs =
@@ -55,7 +57,7 @@ whereClause qs =
 
 wherePred :: Net.QueryItem -> QuotedSql
 wherePred (column, predicate) =
-  ("t.%I " <> op <> "%L", map toSql [column, value])
+  ("%I " <> op <> "%L", map toSql [column, value])
 
   where
     opCode:rest = BS.split ':' $ fromMaybe "" predicate