Safe Haskell	None
Language	Haskell2010

Database.Beam.Backend.SQL.Row

Contents

Orphan instances

Synopsis

data FromBackendRowF be f where
- ParseOneField :: ( BackendFromField be a, Typeable a) => (a -> f) -> FromBackendRowF be f
- Alt :: FromBackendRowM be a -> FromBackendRowM be a -> (a -> f) -> FromBackendRowF be f
- FailParseWith :: BeamRowReadError -> FromBackendRowF be f
newtype FromBackendRowM be a = FromBackendRowM ( F ( FromBackendRowF be) a)
parseOneField :: ( BackendFromField be a, Typeable a) => FromBackendRowM be a
peekField :: ( Typeable a, BackendFromField be a) => FromBackendRowM be ( Maybe a)
data ColumnParseError
- = ColumnUnexpectedNull
- | ColumnNotEnoughColumns ! Int
- | ColumnTypeMismatch {
  - ctmHaskellType :: String
  - ctmSQLType :: String
  - ctmMessage :: String
  }
- | ColumnErrorInternal String
data BeamRowReadError = BeamRowReadError {
- brreColumn :: !( Maybe Int )
- brreError :: ! ColumnParseError
}
class BeamBackend be => FromBackendRow be a where
- fromBackendRow :: FromBackendRowM be a
- valuesNeeded :: Proxy be -> Proxy a -> Int

Documentation

data FromBackendRowF be f where Source #

Constructors

ParseOneField :: ( BackendFromField be a, Typeable a) => (a -> f) -> FromBackendRowF be f
Alt :: FromBackendRowM be a -> FromBackendRowM be a -> (a -> f) -> FromBackendRowF be f
FailParseWith :: BeamRowReadError -> FromBackendRowF be f

Instances

Instances details

Functor ( FromBackendRowF be) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fmap :: (a -> b) -> FromBackendRowF be a -> FromBackendRowF be b Source # (<$) :: a -> FromBackendRowF be b -> FromBackendRowF be a Source #

newtype FromBackendRowM be a Source #

Constructors

FromBackendRowM ( F ( FromBackendRowF be) a)

Instances

Instances details

Monad ( FromBackendRowM be) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods (>>=) :: FromBackendRowM be a -> (a -> FromBackendRowM be b) -> FromBackendRowM be b Source # (>>) :: FromBackendRowM be a -> FromBackendRowM be b -> FromBackendRowM be b Source # return :: a -> FromBackendRowM be a Source #
Functor ( FromBackendRowM be) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fmap :: (a -> b) -> FromBackendRowM be a -> FromBackendRowM be b Source # (<$) :: a -> FromBackendRowM be b -> FromBackendRowM be a Source #
MonadFail ( FromBackendRowM be) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fail :: String -> FromBackendRowM be a Source #
Applicative ( FromBackendRowM be) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods pure :: a -> FromBackendRowM be a Source # (<>) :: FromBackendRowM be (a -> b) -> FromBackendRowM be a -> FromBackendRowM be b Source # liftA2 :: (a -> b -> c) -> FromBackendRowM be a -> FromBackendRowM be b -> FromBackendRowM be c Source # (>) :: FromBackendRowM be a -> FromBackendRowM be b -> FromBackendRowM be b Source # (<*) :: FromBackendRowM be a -> FromBackendRowM be b -> FromBackendRowM be a Source #
Alternative ( FromBackendRowM be) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods empty :: FromBackendRowM be a Source # (<\|>) :: FromBackendRowM be a -> FromBackendRowM be a -> FromBackendRowM be a Source # some :: FromBackendRowM be a -> FromBackendRowM be [a] Source # many :: FromBackendRowM be a -> FromBackendRowM be [a] Source #

parseOneField :: ( BackendFromField be a, Typeable a) => FromBackendRowM be a Source #

peekField :: ( Typeable a, BackendFromField be a) => FromBackendRowM be ( Maybe a) Source #

data ColumnParseError Source #

The exact error encountered

Constructors

ColumnUnexpectedNull
ColumnNotEnoughColumns ! Int
ColumnTypeMismatch
Fields ctmHaskellType :: String ctmSQLType :: String ctmMessage :: String
ColumnErrorInternal String

Instances

Instances details

Eq ColumnParseError Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods (==) :: ColumnParseError -> ColumnParseError -> Bool Source # (/=) :: ColumnParseError -> ColumnParseError -> Bool Source #
Ord ColumnParseError Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods compare :: ColumnParseError -> ColumnParseError -> Ordering Source # (<) :: ColumnParseError -> ColumnParseError -> Bool Source # (<=) :: ColumnParseError -> ColumnParseError -> Bool Source # (>) :: ColumnParseError -> ColumnParseError -> Bool Source # (>=) :: ColumnParseError -> ColumnParseError -> Bool Source # max :: ColumnParseError -> ColumnParseError -> ColumnParseError Source # min :: ColumnParseError -> ColumnParseError -> ColumnParseError Source #
Show ColumnParseError Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods showsPrec :: Int -> ColumnParseError -> ShowS Source # show :: ColumnParseError -> String Source # showList :: [ ColumnParseError ] -> ShowS Source #

data BeamRowReadError Source #

An error that may occur when parsing a row. Contains an optional annotation of which column was being parsed (if available).

Constructors

BeamRowReadError
Fields brreColumn :: !( Maybe Int ) brreError :: ! ColumnParseError

Instances

Instances details

Eq BeamRowReadError Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods (==) :: BeamRowReadError -> BeamRowReadError -> Bool Source # (/=) :: BeamRowReadError -> BeamRowReadError -> Bool Source #
Ord BeamRowReadError Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods compare :: BeamRowReadError -> BeamRowReadError -> Ordering Source # (<) :: BeamRowReadError -> BeamRowReadError -> Bool Source # (<=) :: BeamRowReadError -> BeamRowReadError -> Bool Source # (>) :: BeamRowReadError -> BeamRowReadError -> Bool Source # (>=) :: BeamRowReadError -> BeamRowReadError -> Bool Source # max :: BeamRowReadError -> BeamRowReadError -> BeamRowReadError Source # min :: BeamRowReadError -> BeamRowReadError -> BeamRowReadError Source #
Show BeamRowReadError Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods showsPrec :: Int -> BeamRowReadError -> ShowS Source # show :: BeamRowReadError -> String Source # showList :: [ BeamRowReadError ] -> ShowS Source #
Exception BeamRowReadError Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods toException :: BeamRowReadError -> SomeException Source # fromException :: SomeException -> Maybe BeamRowReadError Source # displayException :: BeamRowReadError -> String Source #

class BeamBackend be => FromBackendRow be a where Source #

Minimal complete definition

Nothing

Methods

fromBackendRow :: FromBackendRowM be a Source #

Parses a beam row. This should not fail, except in the case of an internal bug in beam deserialization code. If it does fail, this should throw a BeamRowParseError .

default fromBackendRow :: ( Typeable a, BackendFromField be a) => FromBackendRowM be a Source #

valuesNeeded :: Proxy be -> Proxy a -> Int Source #

Instances

Instances details

BeamBackend be => FromBackendRow be () Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be () Source # valuesNeeded :: Proxy be -> Proxy () -> Int Source #
FromBackendRow be x => FromBackendRow be ( SqlSerial x) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be ( SqlSerial x) Source # valuesNeeded :: Proxy be -> Proxy ( SqlSerial x) -> Int Source #
( FromBackendRow be x, FromBackendRow be SqlNull ) => FromBackendRow be ( Maybe x) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be ( Maybe x) Source # valuesNeeded :: Proxy be -> Proxy ( Maybe x) -> Int Source #
( BeamBackend be, Generic (tbl ( Nullable Identity )), Generic (tbl ( Nullable Exposed )), GFromBackendRow be ( Rep (tbl ( Nullable Exposed ))) ( Rep (tbl ( Nullable Identity )))) => FromBackendRow be (tbl ( Nullable Identity )) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be (tbl ( Nullable Identity )) Source # valuesNeeded :: Proxy be -> Proxy (tbl ( Nullable Identity )) -> Int Source #
( BeamBackend be, Generic (tbl Identity ), Generic (tbl Exposed ), GFromBackendRow be ( Rep (tbl Exposed )) ( Rep (tbl Identity ))) => FromBackendRow be (tbl Identity ) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be (tbl Identity ) Source # valuesNeeded :: Proxy be -> Proxy (tbl Identity ) -> Int Source #
( BeamBackend be, FromBackendRow be a, FromBackendRow be b) => FromBackendRow be (a, b) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be (a, b) Source # valuesNeeded :: Proxy be -> Proxy (a, b) -> Int Source #
( BeamBackend be, KnownNat n, FromBackendRow be a) => FromBackendRow be ( Vector n a) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be ( Vector n a) Source # valuesNeeded :: Proxy be -> Proxy ( Vector n a) -> Int Source #
( BeamBackend be, FromBackendRow be t) => FromBackendRow be ( Tagged tag t) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be ( Tagged tag t) Source # valuesNeeded :: Proxy be -> Proxy ( Tagged tag t) -> Int Source #
( BeamBackend be, FromBackendRow be a, FromBackendRow be b, FromBackendRow be c) => FromBackendRow be (a, b, c) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be (a, b, c) Source # valuesNeeded :: Proxy be -> Proxy (a, b, c) -> Int Source #
( BeamBackend be, FromBackendRow be a, FromBackendRow be b, FromBackendRow be c, FromBackendRow be d) => FromBackendRow be (a, b, c, d) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be (a, b, c, d) Source # valuesNeeded :: Proxy be -> Proxy (a, b, c, d) -> Int Source #
( BeamBackend be, FromBackendRow be a, FromBackendRow be b, FromBackendRow be c, FromBackendRow be d, FromBackendRow be e) => FromBackendRow be (a, b, c, d, e) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be (a, b, c, d, e) Source # valuesNeeded :: Proxy be -> Proxy (a, b, c, d, e) -> Int Source #
( BeamBackend be, FromBackendRow be a, FromBackendRow be b, FromBackendRow be c, FromBackendRow be d, FromBackendRow be e, FromBackendRow be f) => FromBackendRow be (a, b, c, d, e, f) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be (a, b, c, d, e, f) Source # valuesNeeded :: Proxy be -> Proxy (a, b, c, d, e, f) -> Int Source #
( BeamBackend be, FromBackendRow be a, FromBackendRow be b, FromBackendRow be c, FromBackendRow be d, FromBackendRow be e, FromBackendRow be f, FromBackendRow be g) => FromBackendRow be (a, b, c, d, e, f, g) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be (a, b, c, d, e, f, g) Source # valuesNeeded :: Proxy be -> Proxy (a, b, c, d, e, f, g) -> Int Source #
( BeamBackend be, FromBackendRow be a, FromBackendRow be b, FromBackendRow be c, FromBackendRow be d, FromBackendRow be e, FromBackendRow be f, FromBackendRow be g, FromBackendRow be h) => FromBackendRow be (a, b, c, d, e, f, g, h) Source #
Instance details Defined in Database.Beam.Backend.SQL.Row Methods fromBackendRow :: FromBackendRowM be (a, b, c, d, e, f, g, h) Source # valuesNeeded :: Proxy be -> Proxy (a, b, c, d, e, f, g, h) -> Int Source #

Orphan instances

Generic (a, b, c, d, e, f, g, h) Source #
Instance details Associated Types type Rep (a, b, c, d, e, f, g, h) :: Type -> Type Source # Methods from :: (a, b, c, d, e, f, g, h) -> Rep (a, b, c, d, e, f, g, h) x Source # to :: Rep (a, b, c, d, e, f, g, h) x -> (a, b, c, d, e, f, g, h) Source #