40 lines
1.2 KiB
Haskell
40 lines
1.2 KiB
Haskell
{-# OPTIONS_GHC -fno-warn-orphans #-}
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{-# LANGUAGE UndecidableInstances #-}
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module Database.Persist.Class.Instances
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(
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) where
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import ClassyPrelude
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import Database.Persist.Class
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import Database.Persist.Types (HaskellName, DBName, PersistValue)
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import Database.Persist.Types.Instances ()
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import Data.Binary (Binary)
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import qualified Data.Binary as Binary
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import qualified Data.Map as Map
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instance PersistEntity record => Hashable (Key record) where
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hashWithSalt s = hashWithSalt s . toPersistValue
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instance PersistEntity record => Binary (Key record) where
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put = Binary.put . toPersistValue
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putList = Binary.putList . map toPersistValue
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get = either (fail . unpack) return . fromPersistValue =<< Binary.get
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instance PersistEntity record => NFData (Key record) where
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rnf = rnf . keyToValues
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uniqueToMap :: PersistEntity record => Unique record -> Map (HaskellName, DBName) PersistValue
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uniqueToMap = fmap Map.fromList $ zip <$> persistUniqueToFieldNames <*> persistUniqueToValues
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instance PersistEntity record => Eq (Unique record) where
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(==) = (==) `on` uniqueToMap
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instance PersistEntity record => Show (Unique record) where
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showsPrec p = showsPrec p . uniqueToMap
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