Database.Persist.GenericSql

Description

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

Synopsis

Documentation

Constructors

SqlPersist
Fields unSqlPersist :: ReaderT Connection m a

Instances

MonadTrans SqlPersist
Monad m => Monad (SqlPersist m)
Functor m => Functor (SqlPersist m)
Applicative m => Applicative (SqlPersist m)
MonadInvertIO m => MonadInvertIO (SqlPersist m)
MonadIO m => MonadIO (SqlPersist m)
MonadInvertIO m => PersistBackend (SqlPersist m)

data Connection Source

type ConnectionPool = Pool Connection Source

data Statement Source

runSqlConn :: MonadInvertIO m => SqlPersist m a -> Connection -> m aSource

runSqlPool :: MonadInvertIO m => SqlPersist m a -> Pool Connection -> m aSource

type Migration m = WriterT [String] (WriterT CautiousMigration m) ()Source

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

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

printMigration :: MonadInvertIO m => Migration (SqlPersist m) -> SqlPersist m ()Source

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

runMigration :: MonadInvertIO m => Migration (SqlPersist m) -> SqlPersist m ()Source

runMigrationSilent :: MonadInvertIO m => Migration (SqlPersist m) -> SqlPersist m [String]Source

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

runMigrationUnsafe :: MonadInvertIO m => Migration (SqlPersist m) -> SqlPersist m ()Source

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

mkMigrate :: String -> [EntityDef] -> Q [Dec]Source

Creates a single function to perform all migrations for the entities defined here. One thing to be aware of is dependencies: if you have entities with foreign references, make sure to place those definitions after the entities they reference.