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alsa-seq Sound.ALSA.Sequencer.Client.Info Create a new information area filled with data about an arbitrary client. Copy the content of an object to a newly created object.
getAny :: T mode -> T -> T -> IO Talsa-seq Sound.ALSA.Sequencer.Port.Info No documentation available.
many :: Alternative f => f a -> f [a]classy-prelude ClassyPrelude Zero or more.
Examples
>>> many (putStr "la") lalalalalalalalala... * goes on forever *
>>> many Nothing Just []
>>> take 5 <$> many (Just 1) * hangs forever *
Note that this function can be used with Parsers based on Applicatives. In that case many parser will attempt to parse parser zero or more times until it fails.MkAnyStore :: forall ctx . Store ctx -> AnyStorecontext Context.Internal No documentation available.
ISRManyKeys :: Text -> [PersistValue] -> InsertSqlResultesqueleto Database.Esqueleto No documentation available.
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esqueleto Database.Esqueleto Get many records by their respective identifiers, if available.
Example usage
With schema-1 and dataset-1:getUsers :: MonadIO m => ReaderT SqlBackend m (Map (Key User) User) getUsers = getMany allkeys
musers <- getUsers
The above query when applied on dataset-1, will get these records:+----+-------+-----+ | id | name | age | +----+-------+-----+ | 1 | SPJ | 40 | +----+-------+-----+ | 2 | Simon | 41 | +----+-------+-----+
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esqueleto Database.Esqueleto Same as insertMany_, but takes an Entity instead of just a record. Useful when migrating data from one entity to another and want to preserve ids. The MongoDB, PostgreSQL, SQLite and MySQL backends insert all records in one database query.
Example usage
With schema-1 and dataset-1,insertUserEntityMany :: MonadIO m => ReaderT SqlBackend m () insertUserEntityMany = insertEntityMany [SnakeEntity, EvaEntity]
The above query when applied on dataset-1, will produce this:+-----+------+-----+ |id |name |age | +-----+------+-----+ |1 |SPJ |40 | +-----+------+-----+ |2 |Simon |41 | +-----+------+-----+ |3 |Snake |38 | +-----+------+-----+ |4 |Eva |38 | +-----+------+-----+
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esqueleto Database.Esqueleto Create multiple records in the database and return their Keys. If you don't need the inserted Keys, use insertMany_. The MongoDB and PostgreSQL backends insert all records and retrieve their keys in one database query. The SQLite and MySQL backends use the slow, default implementation of mapM insert.
Example usage
with schema-1 and dataset-1,insertUsers :: MonadIO m => ReaderT SqlBackend m [Key User] insertUsers = insertMany [User "John" 30, User "Nick" 32, User "Jane" 20]
userIds <- insertUsers
The above query when applied on dataset-1, will produce this:+-----+------+-----+ |id |name |age | +-----+------+-----+ |1 |SPJ |40 | +-----+------+-----+ |2 |Simon |41 | +-----+------+-----+ |3 |John |30 | +-----+------+-----+ |4 |Nick |32 | +-----+------+-----+ |5 |Jane |20 | +-----+------+-----+
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esqueleto Database.Esqueleto Same as insertMany, but doesn't return any Keys. The MongoDB, PostgreSQL, SQLite and MySQL backends insert all records in one database query.
Example usage
With schema-1 and dataset-1,insertUsers_ :: MonadIO m => ReaderT SqlBackend m () insertUsers_ = insertMany_ [User "John" 30, User "Nick" 32, User "Jane" 20]
The above query when applied on dataset-1, will produce this:+-----+------+-----+ |id |name |age | +-----+------+-----+ |1 |SPJ |40 | +-----+------+-----+ |2 |Simon |41 | +-----+------+-----+ |3 |John |30 | +-----+------+-----+ |4 |Nick |32 | +-----+------+-----+ |5 |Jane |20 | +-----+------+-----+
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esqueleto Database.Esqueleto Put many records into db
- insert new records that do not exist (or violate any unique constraints)
- replace existing records (matching any unique constraint)