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Use toEncoding for toPersistValueJSON #1541

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d618ef4
Use toEncoding for toPersistValueJSON
matthewbauer Jul 12, 2024
078d80a
Add changelog
matthewbauer Jul 12, 2024
cb292f1
Update persistent/Database/Persist/Class/PersistEntity.hs
matthewbauer Jul 13, 2024
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7 changes: 7 additions & 0 deletions persistent/ChangeLog.md
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Original file line number Diff line number Diff line change
@@ -1,5 +1,12 @@
# Changelog for persistent

## Unreleased

* [#1541](https://github.com/yesodweb/persistent/pull/1541)
* `toPersistValueJSON` now uses `ToJSON`’s `toEncoding` instead of
`toJSON`. This provides a performance benefit because Aeson no
longer needs to construct intermediate `Value`s.

## 2.14.6.1

* [#1528](https://github.com/yesodweb/persistent/pull/1528)
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7 changes: 3 additions & 4 deletions persistent/Database/Persist/Class/PersistEntity.hs
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Expand Up @@ -53,9 +53,10 @@ import Data.Aeson
, (.=)
)
import qualified Data.Aeson.Parser as AP
import Data.Aeson.Text (encodeToTextBuilder)
import Data.Aeson.Encoding (encodingToLazyByteString)
import Data.Aeson.Types (Parser, Result(Error, Success))
import Data.Attoparsec.ByteString (parseOnly)
import qualified Data.ByteString as B
import Data.Functor.Identity
import Web.PathPieces (PathMultiPiece(..), PathPiece(..))

Expand All @@ -71,8 +72,6 @@ import Data.Maybe (isJust)
import Data.Text (Text)
import qualified Data.Text as T
import qualified Data.Text.Encoding as TE
import qualified Data.Text.Lazy as LT
import qualified Data.Text.Lazy.Builder as TB
import GHC.Generics
import GHC.OverloadedLabels
import GHC.TypeLits
Expand Down Expand Up @@ -452,7 +451,7 @@ idField = "_id"
-- toPersistValue = toPersistValueJSON
-- @
toPersistValueJSON :: ToJSON a => a -> PersistValue
toPersistValueJSON = PersistText . LT.toStrict . TB.toLazyText . encodeToTextBuilder . toJSON
toPersistValueJSON = PersistByteString . B.toStrict . encodingToLazyByteString . toEncoding

-- | Convenience function for getting a free 'PersistField' instance
-- from a type with JSON instances. The JSON parser used will accept JSON
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