Safe Haskell	Safe-Inferred
Language	GHC2021

Butler.Database

Contents

re-export

Description

This module contains logic around sqlite-easy

Synopsis

data Database
withDatabase :: StorageAddress -> DatabaseMigration -> (Database -> ProcessIO a) -> ProcessIO a
data DatabaseMigration = DatabaseMigration {
- migrations :: [MigrationName]
- migrateUp :: MigrationName -> Database -> ProcessIO ()
- migrateDown :: MigrationName -> Database -> ProcessIO ()
}
dbSimpleCreate :: Text -> Text -> DatabaseMigration
dbExecute :: MonadUnliftIO m => Database -> Query -> [NamedParam] -> m ()
dbQuery :: (MonadUnliftIO m, FromRow r) => Database -> Query -> [NamedParam] -> m [r]
data NamedParam where
- (:=) :: forall v. ToField v => Text -> v -> NamedParam
newtype Only a = Only {
- fromOnly :: a
}

Documentation

data Database #

withDatabase :: StorageAddress -> DatabaseMigration -> (Database -> ProcessIO a) -> ProcessIO a #

data DatabaseMigration #

Constructors

DatabaseMigration
Fields migrations :: [MigrationName] migrateUp :: MigrationName -> Database -> ProcessIO () migrateDown :: MigrationName -> Database -> ProcessIO ()

dbSimpleCreate :: Text -> Text -> DatabaseMigration #

dbExecute :: MonadUnliftIO m => Database -> Query -> [NamedParam] -> m () #

dbQuery :: (MonadUnliftIO m, FromRow r) => Database -> Query -> [NamedParam] -> m [r] #

re-export

data NamedParam where #

Constructors

(:=) :: forall v. ToField v => Text -> v -> NamedParam infixr 3

Instances

Instances details

Show NamedParam
Instance details Defined in Database.SQLite.Simple Methods showsPrec :: Int -> NamedParam -> ShowS # show :: NamedParam -> String # showList :: [NamedParam] -> ShowS #

newtype Only a #

The 1-tuple type or single-value "collection".

This type is structurally equivalent to the Identity type, but its intent is more about serving as the anonymous 1-tuple type missing from Haskell for attaching typeclass instances.

Parameter usage example:

encodeSomething (Only (42::Int))

Result usage example:

xs <- decodeSomething
forM_ xs $ \(Only id) -> {- ... -}

Constructors

Only
Fields fromOnly :: a

Instances

Instances details

Functor Only
Instance details Defined in Data.Tuple.Only Methods fmap :: (a -> b) -> Only a -> Only b # (<$) :: a -> Only b -> Only a #
Data a => Data (Only a)
Instance details Defined in Data.Tuple.Only Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Only a -> c (Only a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Only a) # toConstr :: Only a -> Constr # dataTypeOf :: Only a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Only a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Only a)) # gmapT :: (forall b. Data b => b -> b) -> Only a -> Only a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Only a -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Only a -> r # gmapQ :: (forall d. Data d => d -> u) -> Only a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Only a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Only a -> m (Only a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Only a -> m (Only a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Only a -> m (Only a) #
Generic (Only a)
Instance details Defined in Data.Tuple.Only Associated Types type Rep (Only a) :: Type -> Type # Methods from :: Only a -> Rep (Only a) x # to :: Rep (Only a) x -> Only a #
Read a => Read (Only a)
Instance details Defined in Data.Tuple.Only Methods readsPrec :: Int -> ReadS (Only a) # readList :: ReadS [Only a] # readPrec :: ReadPrec (Only a) # readListPrec :: ReadPrec [Only a] #
Show a => Show (Only a)
Instance details Defined in Data.Tuple.Only Methods showsPrec :: Int -> Only a -> ShowS # show :: Only a -> String # showList :: [Only a] -> ShowS #
NFData a => NFData (Only a)
Instance details Defined in Data.Tuple.Only Methods rnf :: Only a -> () #
Eq a => Eq (Only a)
Instance details Defined in Data.Tuple.Only Methods (==) :: Only a -> Only a -> Bool # (/=) :: Only a -> Only a -> Bool #
Ord a => Ord (Only a)
Instance details Defined in Data.Tuple.Only Methods compare :: Only a -> Only a -> Ordering # (<) :: Only a -> Only a -> Bool # (<=) :: Only a -> Only a -> Bool # (>) :: Only a -> Only a -> Bool # (>=) :: Only a -> Only a -> Bool # max :: Only a -> Only a -> Only a # min :: Only a -> Only a -> Only a #
FromField a => FromRow (Only a)
Instance details Defined in Database.SQLite.Simple.FromRow Methods fromRow :: RowParser (Only a) #
ToField a => ToRow (Only a)
Instance details Defined in Database.SQLite.Simple.ToRow Methods toRow :: Only a -> [SQLData] #
type Rep (Only a)
Instance details Defined in Data.Tuple.Only type Rep (Only a) = D1 ('MetaData "Only" "Data.Tuple.Only" "Only-0.1-DiaFlOQSZ1l8JCg8TmCabZ" 'True) (C1 ('MetaCons "Only" 'PrefixI 'True) (S1 ('MetaSel ('Just "fromOnly") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))