scalikejdbc

DB

object DB extends LoanPattern with Serializable

Basic Database Accessor

You can start with DB and blocks if using scalikejdbc.ConnectionPool.singleton().

Using DBSession:

ConnectionPool.singleton("jdbc:...","user","password")
case class User(id: Int, name: String)

val users = DB readOnly { session =>
  session.list("select * from user") { rs =>
    User(rs.int("id"), rs.string("name"))
  }
}

DB autoCommit { session =>
  session.update("insert into user values (?,?)", 123, "Alice")
}

DB localTx { session =>
  session.update("insert into user values (?,?)", 123, "Alice")
}

using(DB(ConnectionPool.borrow())) { db =>
  db.begin()
  try {
    DB withTx { session =>
      session.update("update user set name = ? where id = ?", "Alice", 123)
    }
    db.commit()
  } catch { case e =>
    db.rollbackIfActive()
    throw e
  }
}

Using SQL:

ConnectionPool.singleton("jdbc:...","user","password")
case class User(id: Int, name: String)

val users = DB readOnly { session =>
  SQL("select * from user").map { rs =>
    User(rs.int("id"), rs.string("name"))
  }.list.apply()
}

DB autoCommit { session =>
  SQL("insert into user values (?,?)").bind(123, "Alice").update.apply()
}

DB localTx { session =>
  SQL("insert into user values (?,?)").bind(123, "Alice").update.apply()
}

using(DB(ConnectionPool.borrow())) { db =>
  db.begin()
  try {
    DB withTx { session =>
      SQL("update user set name = ? where id = ?").bind("Alice", 123).update.apply()
    }
    db.commit()
  } catch { case e =>
    db.rollbackIfActive()
    throw e
  }
}
Linear Supertypes
Serializable, Serializable, LoanPattern, AnyRef, Any
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  1. DB
  2. Serializable
  3. Serializable
  4. LoanPattern
  5. AnyRef
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Type Members

  1. type CPContext = ConnectionPoolContext

  2. type Closable = AnyRef { def close(): Unit }

    Definition Classes
    LoanPattern

Value Members

  1. final def !=(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

    Definition Classes
    AnyRef → Any

  3. final def ==(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  4. val NoCPContext: NoConnectionPoolContext.type

  5. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  6. def autoCommit[A](execution: (DBSession) ⇒ A)(implicit context: CPContext = NoCPContext): A

    Begins a auto-commit block easily with ConnectionPool.

    Begins a auto-commit block easily with ConnectionPool.

    A

    return type

    execution

    execution

    context

    connection pool context

    returns

    result value

  7. def autoCommitSession()(implicit context: CPContext = NoCPContext): DBSession

    Returns auto-commit session instance.

    Returns auto-commit session instance. You SHOULD close this instance by yourself.

    context

    connection pool context

    returns

    session

  8. def autoCommitWithConnection[A](execution: (Connection) ⇒ A)(implicit context: CPContext = NoCPContext): A

    Begins a auto-commit block easily with ConnectionPool and pass not session but connection to execution block.

    Begins a auto-commit block easily with ConnectionPool and pass not session but connection to execution block.

    A

    return type

    execution

    execution

    context

    connection pool context

    returns

    result value

  9. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  10. def connect(conn: Connection = ConnectionPool.borrow()): DB

    Get a connection and returns a DB instance.

    Get a connection and returns a DB instance.

    conn

    connection

    returns

    DB instance

  11. def connected(implicit conn: Connection): DB

    Returns a DB instance by using an implicit Connection object.

    Returns a DB instance by using an implicit Connection object.

    conn

    connection

    returns

    DB instance

  12. def describe(table: String)(implicit context: CPContext = NoCPContext): String

    Returns describe style string value for the table

    Returns describe style string value for the table

    table

    table name (with schema optionally)

    context

    connection pool context as implicit parameter

    returns

    described information

  13. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  14. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  15. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  16. def getAllTableNames()(implicit context: CPContext = NoCPContext): List[String]

    Returns all the table names

    Returns all the table names

    context

    connection pool context as implicit parameter

    returns

    table information

  17. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any

  18. def getColumnNames(table: String)(implicit context: CPContext = NoCPContext): List[String]

  19. def getTable(table: String)(implicit context: CPContext = NoCPContext): Option[Table]

    Returns table information

    Returns table information

    table

    table name (with schema optionally)

    context

    connection pool context as implicit parameter

    returns

    table information

  20. def getTableNames(tableNamePattern: String)(implicit context: CPContext = NoCPContext): List[String]

    Returns multiple table information

    Returns multiple table information

    tableNamePattern

    table name pattern (with schema optionally)

    context

    connection pool context as implicit parameter

    returns

    table information

  21. def hashCode(): Int

    Definition Classes
    AnyRef → Any

  22. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

  23. def localTx[A](execution: (DBSession) ⇒ A)(implicit context: CPContext = NoCPContext): A

    Begins a local-tx block easily with ConnectionPool.

    Begins a local-tx block easily with ConnectionPool.

    A

    return type

    execution

    execution

    context

    connection pool context

    returns

    result value

  24. def localTxWithConnection[A](execution: (Connection) ⇒ A)(implicit context: CPContext = NoCPContext): A

    Begins a local-tx block easily with ConnectionPool and pass not session but connection to execution block.

    Begins a local-tx block easily with ConnectionPool and pass not session but connection to execution block.

    A

    return type

    execution

    execution

    context

    connection pool context

    returns

    result value

  25. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  26. final def notify(): Unit

    Definition Classes
    AnyRef

  27. final def notifyAll(): Unit

    Definition Classes
    AnyRef

  28. def readOnly[A](execution: (DBSession) ⇒ A)(implicit context: CPContext = NoCPContext): A

    Begins a read-only block easily with ConnectionPool.

    Begins a read-only block easily with ConnectionPool.

    A

    return type

    execution

    execution

    context

    connection pool context

    returns

    result value

  29. def readOnlySession()(implicit context: CPContext = NoCPContext): DBSession

    Returns read-only session instance.

    Returns read-only session instance. You SHOULD close this instance by yourself.

    context

    connection pool context

    returns

    session

  30. def readOnlyWithConnection[A](execution: (Connection) ⇒ A)(implicit context: CPContext = NoCPContext): A

    Begins a read-only block easily with ConnectionPool and pass not session but connection to execution block.

    Begins a read-only block easily with ConnectionPool and pass not session but connection to execution block.

    A

    return type

    execution

    execution

    context

    connection pool context

    returns

    result value

  31. def showTables(tableNamePattern: String = "%", tableTypes: Array[String] = Array("TABLE", "VIEW"))(implicit context: CPContext = NoCPContext): String

    Returns table name list

    Returns table name list

    tableNamePattern

    table name pattern (with schema optionally)

    context

    connection pool context as implicit parameter

    returns

    table name list

  32. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef

  33. def toString(): String

    Definition Classes
    AnyRef → Any

  34. def using[R <: Closable, A](resource: R)(f: (R) ⇒ A): A

    Definition Classes
    LoanPattern

  35. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  36. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  37. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  38. def withinTx[A](execution: (DBSession) ⇒ A)(implicit db: DB): A

    Begins a within-tx block easily with a DB instance as an implicit parameter.

    Begins a within-tx block easily with a DB instance as an implicit parameter.

    A

    return type

    execution

    execution

    db

    DB instance as an implicit parameter

    returns

    result value

  39. def withinTxSession()(implicit db: DB): DBSession

    Returns within-tx session instance.

    Returns within-tx session instance. You SHOULD close this instance by yourself.

    db

    DB instance as an implicit parameter

    returns

    session

  40. def withinTxWithConnection[A](execution: (Connection) ⇒ A)(implicit db: DB): A

    Begins a within-tx block easily with a DB instance as an implicit parameter and pass not session but connection to execution block.

    Begins a within-tx block easily with a DB instance as an implicit parameter and pass not session but connection to execution block.

    A

    return type

    execution

    execution

    db

    DB instance as an implicit parameter

    returns

    result value

Inherited from Serializable

Inherited from Serializable

Inherited from LoanPattern

Inherited from AnyRef

Inherited from Any

Ungrouped