Database.Persist.GenericSql

This is a helper module for creating SQL backends. Regular users do not need to use this module.

Documentation

newtype SqlPersist m a

Constructors

SqlPersist

Fields

unSqlPersist :: ReaderT Connection m a

Instances

MonadTrans SqlPersist

MonadControlIO m => PersistBackend SqlPersist m

Monad m => Monad (SqlPersist m)

Functor m => Functor (SqlPersist m)

MonadPlus m => MonadPlus (SqlPersist m)

Applicative m => Applicative (SqlPersist m)

MonadIO m => MonadIO (SqlPersist m)

MonadControlIO m => MonadControlIO (SqlPersist m)

SinglePiece (Key SqlPersist entity)

(PersistEntity one, PersistEntity many, Eq (Key SqlPersist one)) => RunJoin (SelectOneMany SqlPersist one many)

data Connection

type ConnectionPool = Pool Connection

data Statement

runSqlConn :: MonadControlIO m => SqlPersist m a -> Connection -> m a

runSqlPool :: MonadControlIO m => SqlPersist m a -> Pool Connection -> m a

type Migration m = WriterT [Text] (WriterT CautiousMigration m) ()

parseMigration :: Monad m => Migration m -> m (Either [Text] CautiousMigration)

parseMigration' :: Monad m => Migration m -> m CautiousMigration

printMigration :: MonadControlIO m => Migration (SqlPersist m) -> SqlPersist m ()

getMigration :: MonadControlIO m => Migration (SqlPersist m) -> SqlPersist m [Sql]

runMigration :: MonadControlIO m => Migration (SqlPersist m) -> SqlPersist m ()

runMigrationSilent :: MonadControlIO m => Migration (SqlPersist m) -> SqlPersist m [Text]

Same as runMigration, but returns a list of the SQL commands executed instead of printing them to stderr.

runMigrationUnsafe :: MonadControlIO m => Migration (SqlPersist m) -> SqlPersist m ()

migrate :: (MonadControlIO m, PersistEntity val) => val -> Migration (SqlPersist m)

commit :: MonadIO m => SqlPersist m ()

Perform a database commit.

rollback :: MonadIO m => SqlPersist m ()

Perform a database rollback.

newtype Key backend entity

Constructors

Key

Fields

unKey :: PersistValue

Instances

Eq (Key backend entity)

Ord (Key backend entity)

Read (Key backend entity)

Show (Key backend entity)

SinglePiece (Key SqlPersist entity)

PersistField (Key backend entity)