Database.Beam.Backend.SQL.Row

Documentation

data FromBackendRowF be f where

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

Functor (FromBackendRowF be)

Defined in Database.Beam.Backend.SQL.Row

Methods

fmap :: (a -> b) -> FromBackendRowF be a -> FromBackendRowF be b

(<$) :: a -> FromBackendRowF be b -> FromBackendRowF be a

newtype FromBackendRowM be a

Constructors

FromBackendRowM (F (FromBackendRowF be) a)

Instances

Monad (FromBackendRowM be)

Defined in Database.Beam.Backend.SQL.Row

Methods

(>>=) :: FromBackendRowM be a -> (a -> FromBackendRowM be b) -> FromBackendRowM be b

(>>) :: FromBackendRowM be a -> FromBackendRowM be b -> FromBackendRowM be b

return :: a -> FromBackendRowM be a

Functor (FromBackendRowM be)

Defined in Database.Beam.Backend.SQL.Row

Methods

fmap :: (a -> b) -> FromBackendRowM be a -> FromBackendRowM be b

(<$) :: a -> FromBackendRowM be b -> FromBackendRowM be a

MonadFail (FromBackendRowM be)

Defined in Database.Beam.Backend.SQL.Row

Methods

fail :: String -> FromBackendRowM be a

Applicative (FromBackendRowM be)

Defined in Database.Beam.Backend.SQL.Row

Methods

pure :: a -> FromBackendRowM be a

(<*>) :: FromBackendRowM be (a -> b) -> FromBackendRowM be a -> FromBackendRowM be b

liftA2 :: (a -> b -> c) -> FromBackendRowM be a -> FromBackendRowM be b -> FromBackendRowM be c

(*>) :: FromBackendRowM be a -> FromBackendRowM be b -> FromBackendRowM be b

(<*) :: FromBackendRowM be a -> FromBackendRowM be b -> FromBackendRowM be a

Alternative (FromBackendRowM be)

Defined in Database.Beam.Backend.SQL.Row

Methods

empty :: FromBackendRowM be a

(<|>) :: FromBackendRowM be a -> FromBackendRowM be a -> FromBackendRowM be a

some :: FromBackendRowM be a -> FromBackendRowM be [a]

many :: FromBackendRowM be a -> FromBackendRowM be [a]

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

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

data ColumnParseError

The exact error encountered

Constructors

ColumnUnexpectedNull

ColumnNotEnoughColumns !Int

ColumnTypeMismatch

Fields

• ctmHaskellType :: String
• ctmSQLType :: String
• ctmMessage :: String

ColumnErrorInternal String

Instances

Eq ColumnParseError

Defined in Database.Beam.Backend.SQL.Row

Methods

(==) :: ColumnParseError -> ColumnParseError -> Bool

(/=) :: ColumnParseError -> ColumnParseError -> Bool

Ord ColumnParseError

Defined in Database.Beam.Backend.SQL.Row

Methods

compare :: ColumnParseError -> ColumnParseError -> Ordering

(<) :: ColumnParseError -> ColumnParseError -> Bool

(<=) :: ColumnParseError -> ColumnParseError -> Bool

(>) :: ColumnParseError -> ColumnParseError -> Bool

(>=) :: ColumnParseError -> ColumnParseError -> Bool

max :: ColumnParseError -> ColumnParseError -> ColumnParseError

min :: ColumnParseError -> ColumnParseError -> ColumnParseError

Show ColumnParseError

Defined in Database.Beam.Backend.SQL.Row

Methods

showsPrec :: Int -> ColumnParseError -> ShowS

show :: ColumnParseError -> String

showList :: [ColumnParseError] -> ShowS

data BeamRowReadError

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

Eq BeamRowReadError

Defined in Database.Beam.Backend.SQL.Row

Methods

(==) :: BeamRowReadError -> BeamRowReadError -> Bool

(/=) :: BeamRowReadError -> BeamRowReadError -> Bool

Ord BeamRowReadError

Defined in Database.Beam.Backend.SQL.Row

Methods

compare :: BeamRowReadError -> BeamRowReadError -> Ordering

(<) :: BeamRowReadError -> BeamRowReadError -> Bool

(<=) :: BeamRowReadError -> BeamRowReadError -> Bool

(>) :: BeamRowReadError -> BeamRowReadError -> Bool

(>=) :: BeamRowReadError -> BeamRowReadError -> Bool

max :: BeamRowReadError -> BeamRowReadError -> BeamRowReadError

min :: BeamRowReadError -> BeamRowReadError -> BeamRowReadError

Show BeamRowReadError

Defined in Database.Beam.Backend.SQL.Row

Methods

showsPrec :: Int -> BeamRowReadError -> ShowS

show :: BeamRowReadError -> String

showList :: [BeamRowReadError] -> ShowS

Exception BeamRowReadError

Defined in Database.Beam.Backend.SQL.Row

Methods

toException :: BeamRowReadError -> SomeException

fromException :: SomeException -> Maybe BeamRowReadError

displayException :: BeamRowReadError -> String

class BeamBackend be => FromBackendRow be a where

Minimal complete definition

Nothing

Methods

fromBackendRow :: FromBackendRowM be a

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

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

Instances

BeamBackend be => FromBackendRow be ()

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be ()

valuesNeeded :: Proxy be -> Proxy () -> Int

FromBackendRow be x => FromBackendRow be (SqlSerial x)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (SqlSerial x)

valuesNeeded :: Proxy be -> Proxy (SqlSerial x) -> Int

(FromBackendRow be x, FromBackendRow be SqlNull) => FromBackendRow be (Maybe x)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (Maybe x)

valuesNeeded :: Proxy be -> Proxy (Maybe x) -> Int

(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))

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (tbl (Nullable Identity))

valuesNeeded :: Proxy be -> Proxy (tbl (Nullable Identity)) -> Int

(BeamBackend be, Generic (tbl Identity), Generic (tbl Exposed), GFromBackendRow be (Rep (tbl Exposed)) (Rep (tbl Identity))) => FromBackendRow be (tbl Identity)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (tbl Identity)

valuesNeeded :: Proxy be -> Proxy (tbl Identity) -> Int

(BeamBackend be, FromBackendRow be a, FromBackendRow be b) => FromBackendRow be (a, b)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (a, b)

valuesNeeded :: Proxy be -> Proxy (a, b) -> Int

(BeamBackend be, KnownNat n, FromBackendRow be a) => FromBackendRow be (Vector n a)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (Vector n a)

valuesNeeded :: Proxy be -> Proxy (Vector n a) -> Int

(BeamBackend be, FromBackendRow be t) => FromBackendRow be (Tagged tag t)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (Tagged tag t)

valuesNeeded :: Proxy be -> Proxy (Tagged tag t) -> Int

(BeamBackend be, FromBackendRow be a, FromBackendRow be b, FromBackendRow be c) => FromBackendRow be (a, b, c)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (a, b, c)

valuesNeeded :: Proxy be -> Proxy (a, b, c) -> Int

(BeamBackend be, FromBackendRow be a, FromBackendRow be b, FromBackendRow be c, FromBackendRow be d) => FromBackendRow be (a, b, c, d)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (a, b, c, d)

valuesNeeded :: Proxy be -> Proxy (a, b, c, d) -> Int

(BeamBackend be, FromBackendRow be a, FromBackendRow be b, FromBackendRow be c, FromBackendRow be d, FromBackendRow be e) => FromBackendRow be (a, b, c, d, e)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (a, b, c, d, e)

valuesNeeded :: Proxy be -> Proxy (a, b, c, d, e) -> Int

(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)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (a, b, c, d, e, f)

valuesNeeded :: Proxy be -> Proxy (a, b, c, d, e, f) -> Int

(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)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (a, b, c, d, e, f, g)

valuesNeeded :: Proxy be -> Proxy (a, b, c, d, e, f, g) -> Int

(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)

Defined in Database.Beam.Backend.SQL.Row

Methods

fromBackendRow :: FromBackendRowM be (a, b, c, d, e, f, g, h)

valuesNeeded :: Proxy be -> Proxy (a, b, c, d, e, f, g, h) -> Int

Orphan instances

Generic (a, b, c, d, e, f, g, h)

Associated Types

type Rep (a, b, c, d, e, f, g, h) :: Type -> Type

Methods

from :: (a, b, c, d, e, f, g, h) -> Rep (a, b, c, d, e, f, g, h) x

to :: Rep (a, b, c, d, e, f, g, h) x -> (a, b, c, d, e, f, g, h)