Documentation

Arguments

:: MonadIO m
=> ConnectionString	Connection string to the database.
-> Int	Number of connections to be kept open in the pool.
-> (ConnectionPool -> m a)	Action to be executed that uses the connection pool.
-> m a

Create a PostgreSQL connection pool and run the given action. The pool is properly released after the action finishes using it. Note that you should not use the given ConnectionPool outside the action since it may be already been released.

withPostgresqlConn :: ResourceIO m => ConnectionString -> (Connection -> m a) -> m aSource

Same as withPostgresqlPool, but instead of opening a pool of connections, only one connection is opened.

createPostgresqlPool Source

Arguments

:: MonadIO m
=> ConnectionString	Connection string to the database.
-> Int	Number of connections to be kept open in the pool.
-> m ConnectionPool

Create a PostgreSQL connection pool. Note that it's your responsability to properly close the connection pool when unneeded. Use withPostgresqlPool for an automatic resource control.

module Database.Persist

module Database.Persist.GenericSql

type ConnectionString = ByteString Source

A libpq connection string. A simple example of connection string would be "host=localhost port=5432 user=test dbname=test password=test". Please read libpq's documentation at http://www.postgresql.org/docs/9.1/static/libpq-connect.html for more details on how to create such strings.

data PostgresConf Source

Information required to connect to a PostgreSQL database using persistent's generic facilities. These values are the same that are given to withPostgresqlPool.

Constructors

PostgresConf
Fields pgConnStr :: ConnectionString The connection string. pgPoolSize :: Int How many connections should be held on the connection pool.

Instances

PersistConfig PostgresConf