ライブラリで遊んでいScalikeJdbc
ます。PostgreSQL データベースからデータを取得したい。私が得るエラーは私にとって非常に奇妙です。CP を手動で構成しても、次のようになります。
val poolSettings = new ConnectionPoolSettings(initialSize = 100, maxSize = 100)
ConnectionPool.singleton("jdbc:postgresql://localhost:5432/test", "user", "pass", poolSettings)
まだエラーが表示されます。これが私のDAOです:
class CustomerDAO {
case class Customer(id: Long, firstname: String, lastname: String)
object Customer extends SQLSyntaxSupport[Customer]
val c = Customer.syntax("c")
def findById(id: Long)(implicit session: DBSession = Customer.autoSession) =
withSQL {
select.from(Customer as c)
}.map(
rs => Customer(
rs.int("id"),
rs.string("firstname"),
rs.string("lastname")
)
).single.apply()
}
アプリ:
object JdbcTest extends App {
val dao = new CustomerDAO
val res: Option[dao.Customer] = dao.findById(2)
}
私のapplication.conf
ファイル
# PostgreSQL
db.default.driver = "org.postgresql.Driver"
db.default.url = "jdbc:postgresql://localhost:5432/test"
db.default.user = "user"
db.default.password = "pass"
# Connection Pool settings
db.default.poolInitialSize = 5
db.default.poolMaxSize = 7
db.default.poolConnectionTimeoutMillis = 1000
エラー:
Exception in thread "main" java.lang.IllegalStateException: Connection pool is not yet initialized.(name:'default)
at scalikejdbc.ConnectionPool$$anonfun$get$1.apply(ConnectionPool.scala:57)
at scalikejdbc.ConnectionPool$$anonfun$get$1.apply(ConnectionPool.scala:55)
at scala.Option.getOrElse(Option.scala:120)
at scalikejdbc.ConnectionPool$.get(ConnectionPool.scala:55)
at scalikejdbc.ConnectionPool$.apply(ConnectionPool.scala:46)
at scalikejdbc.NamedDB.connectionPool(NamedDB.scala:20)
at scalikejdbc.NamedDB.db$lzycompute(NamedDB.scala:32)
私は何を取りこぼしたか?