Revert "More BackendCompatible generalizations (#723)"

persistent-mysql/Database/Persist/MySQL.hs

@@ -29,7 +29,7 @@ import Control.Monad.Logger (MonadLogger, runNoLoggingT)
 import Control.Monad.IO.Class (MonadIO (..))
 import Control.Monad.Trans.Class (lift)
 import Control.Monad.Trans.Except (runExceptT)
-import Control.Monad.Trans.Reader (runReaderT, ReaderT)
+import Control.Monad.Trans.Reader (runReaderT, ReaderT, withReaderT)
 import Control.Monad.Trans.Writer (runWriterT)
 import Data.Either (partitionEithers)
 import Data.Monoid ((<>))
@@ -1182,7 +1182,8 @@ insertManyOnDuplicateKeyUpdate
     -> ReaderT backend m ()
 insertManyOnDuplicateKeyUpdate [] _ _ = return ()
 insertManyOnDuplicateKeyUpdate records fieldValues updates =
-    uncurry rawExecute
+    withReaderT projectBackend
+    . uncurry rawExecute
     $ mkBulkInsertQuery records fieldValues updates
 
 -- | This creates the query for 'bulkInsertOnDuplicateKeyUpdate'. If you

persistent-mysql/persistent-mysql.cabal

@@ -1,5 +1,5 @@
 name:            persistent-mysql
-version:         2.6.2.2
+version:         2.6.2.1
 license:         MIT
 license-file:    LICENSE
 author:          Felipe Lessa <felipe.lessa@gmail.com>, Michael Snoyman

persistent/ChangeLog.md

@@ -1,10 +1,13 @@
-## 2.7.2.1
+## 2.7.3 
 
+* Reverts [#723](https://github.com/yesodweb/persistent/pull/723), which generalized functions using the `BackendCompatible` class. These changes were an accidental breaking change.
 * Recommend the `PersistDbSpecific` docs if someone gets an error about converting from `PersistDbSpecific`
 
-## 2.7.2
+## 2.7.2 [DEPRECATED ON HACKAGE]
 
 * Many of the functions have been generalized using the `BackendCompatible` class. [#723](https://github.com/yesodweb/persistent/pull/723)
+	* This change was an accidental breaking change and was reverted in 2.7.3.
+	* These change will be released in a future version of Persistent with a major version bump.
 * Add raw sql quasi quoters [#717](https://github.com/yesodweb/persistent/pull/717)
 
 ## 2.7.1

persistent/Database/Persist/Sql/Migration.hs

@@ -27,7 +27,6 @@ import Control.Monad.Trans.Control (liftBaseOp_)
 import Database.Persist.Sql.Types
 import Database.Persist.Sql.Raw
 import Database.Persist.Types
-import Database.Persist.Sql.Orphan.PersistStore()
 
 allSql :: CautiousMigration -> [Sql]
 allSql = map snd

persistent/Database/Persist/Sql/Raw.hs

@@ -47,20 +47,20 @@ rawQueryRes sql vals = do
         stmtQuery stmt vals
 
 -- | Execute a raw SQL statement
-rawExecute :: (MonadIO m, BackendCompatible SqlBackend backend)
+rawExecute :: MonadIO m
            => Text            -- ^ SQL statement, possibly with placeholders.
            -> [PersistValue]  -- ^ Values to fill the placeholders.
-           -> ReaderT backend m ()
+           -> ReaderT SqlBackend m ()
 rawExecute x y = liftM (const ()) $ rawExecuteCount x y
 
 -- | Execute a raw SQL statement and return the number of
 -- rows it has modified.
-rawExecuteCount :: (MonadIO m, BackendCompatible SqlBackend backend)
+rawExecuteCount :: (MonadIO m, IsSqlBackend backend)
                 => Text            -- ^ SQL statement, possibly with placeholders.
                 -> [PersistValue]  -- ^ Values to fill the placeholders.
                 -> ReaderT backend m Int64
 rawExecuteCount sql vals = do
-    conn <- projectBackend `liftM` ask
+    conn <- persistBackend `liftM` ask
     runLoggingT (logDebugNS (pack "SQL") $ T.append sql $ pack $ "; " ++ show vals)
         (connLogFunc conn)
     stmt <- getStmt sql
@@ -69,10 +69,10 @@ rawExecuteCount sql vals = do
     return res
 
 getStmt
-  :: (MonadIO m, BackendCompatible SqlBackend backend)
+  :: (MonadIO m, IsSqlBackend backend)
   => Text -> ReaderT backend m Statement
 getStmt sql = do
-    conn <- projectBackend `liftM` ask
+    conn <- persistBackend `liftM` ask
     liftIO $ getStmtConn conn sql
 
 getStmtConn :: SqlBackend -> Text -> IO Statement

persistent/Database/Persist/Sql/Types/Internal.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE ConstraintKinds #-}
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
@@ -40,7 +39,6 @@ import Database.Persist.Class
   , PersistQueryRead, PersistQueryWrite
   , PersistStoreRead, PersistStoreWrite
   , PersistUniqueRead, PersistUniqueWrite
-  , BackendCompatible(..)
   )
 import Database.Persist.Class.PersistStore (IsPersistBackend (..))
 import Database.Persist.Types
@@ -132,7 +130,7 @@ readToUnknown ma = do
 
 -- | A constraint synonym which witnesses that a backend is SQL and can run read queries.
 type SqlBackendCanRead backend =
-  ( BackendCompatible SqlBackend backend
+  ( IsSqlBackend backend
   , PersistQueryRead backend, PersistStoreRead backend, PersistUniqueRead backend
   )
 -- | A constraint synonym which witnesses that a backend is SQL and can run read and write queries.

persistent/persistent.cabal

@@ -1,5 +1,5 @@
 name:            persistent
-version:         2.7.2.1
+version:         2.7.3
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>