Opaleye.Classy

Documentation

data DbEnv

Constructors

DbEnv

Fields

_dbEnvConn :: Connection

dbEnvConn :: HasDbEnv c => Lens' c Connection

data DbError

Constructors

DbSqlError SqlError

DbQueryError QueryError

DbResultError ResultError

Instances

Show DbError

_DbSqlError :: AsDbError r => Prism' r SqlError

_DbQueryError :: AsDbError r => Prism' r QueryError

_DbResultError :: AsDbError r => Prism' r ResultError

type CanDb m c e = (MonadReader c m, MonadError e m, MonadIO m, Applicative m, AsDbError e, HasDbEnv c)

liftQueryFirst :: (CanDb m c e, Default QueryRunner a b, Applicative m) => Query a -> m (Maybe b)

liftQuery :: (CanDb m c e, Default QueryRunner a b) => Query a -> m [b]

liftInsert :: CanDb m c e => Table colW colR -> colW -> m Int64

liftInsertReturning :: (CanDb m c e, Default QueryRunner ret hask, Default Unpackspec ret ret) => Table colW colR -> (colR -> ret) -> colW -> m [hask]

liftDelete :: CanDb m c e => Table colW colR -> (colR -> Column PGBool) -> m Int64

liftUpdate :: CanDb m c e => Table colW colR -> (colR -> colW) -> (colR -> Column PGBool) -> m Int64

closeEnv :: DbEnv -> IO ()

derivePGField :: forall a b. FromField a => (a -> b) -> Field -> Maybe ByteString -> Conversion b