I'm trying to build the bars tutorial project from "Getting Started with Play 2, Scala, and Squeryl" by James Ward, Ryan Knight July 11, 2012.
I can get it to work okay until I enter the URL for the bars list (//localhost:9000/bars). At that point I receive the following error in my browser: "Execution Exception [RuntimeException: java.lang.NoClassDefFoundError: scala/reflect/ClassManifest]". If I refresh my browser I then get the following error: "[RuntimeException: java.lang.NoClassDefFoundError: Could not initialize class com.codahale.jerkson.Json$]".
I've tried creating this project using Activator, Command Line Play and Eclipse.
I know there are differences in the versions of dependencies, Scala and Play 2 between the tutorial and what I'm using and that may be causing my problem. But I don't know what that might be. I'm assuming that I'm missing something to do with scala/reflect/ClassManifest. But, I have a dependency included for "org.scala-lang" % "scala-reflect" % "2.10.3".
I'm running Play 2.2.1 built with Scala 2.20.3 running Java 1.7.0.
I've tried to include all the relevant code below.
Any help would be appreciated. Thanks
build.sbt
> import AddSettings._ name := "mysquerylapp"
>
> version := "1.0-SNAPSHOT"
>
> libraryDependencies ++= Seq(
> "org.webjars" %% "webjars-play" % "2.2.0",
> "org.webjars" % "bootstrap" % "2.3.1",
> "org.scala-lang" % "scala-reflect" % "2.10.3",
> "org.scalatest" % "scalatest_2.10" % "2.0.M8",
> "com.codahale" % "jerkson_2.9.1" % "0.5.0",
> "org.squeryl" % "squeryl_2.10" % "0.9.5-6",
> "postgresql" % "postgresql" % "9.1-901-1.jdbc4", jdbc, anorm, cache )
>
> lazy val main = Project(id="main",
> base=file(".")).settings(play.Project.playScalaSettings:_*).autoSettings(userSettings,
> allPlugins, defaultSbtFiles)
>
> //play.Project.playScalaSettings
application.conf
> # This is the main configuration file for the application.
> # ~~~~~
>
> # Secret key
> # ~~~~~
> # The secret key is used to secure cryptographics functions.
> # If you deploy your application to several instances be sure to use the same key!
> application.secret="GZXuoBh0fnkNJh8B__1IsG5_YIi/Fw:W?=8[WB^k?=F?gR?X^oQ1J]fTqJB<ZZi1"
>
> # The application languages
> # ~~~~~ application.langs="en"
>
> # Global object class
> # ~~~~~
> # Define the Global object class for this application.
> # Default to Global in the root package.
> # application.global=Global
>
> # Router
> # ~~~~~
> # Define the Router object to use for this application.
> # This router will be looked up first when the application is starting up,
> # so make sure this is the entry point.
> # Furthermore, it's assumed your route file is named properly.
> # So for an application router like `my.application.Router`,
> # you may need to define a router file `conf/my.application.routes`.
> # Default to Routes in the root package (and conf/routes)
> # application.router=my.application.Routes
>
> # Database configuration
> # ~~~~~
> # You can declare as many datasources as you want.
> # By convention, the default datasource is named `default`
> # db.default.driver=org.h2.Driver db.default.url="jdbc:h2:mem:play"
> # db.default.user=sa
> # db.default.password=""
>
> # Evolutions
> # ~~~~~
> # You can disable evolutions if needed
> # evolutionplugin=disabled
>
> # Logger
> # ~~~~~
> # You can also configure logback (http://logback.qos.ch/),
> # by providing an application-logger.xml file in the conf directory.
>
> # Root logger: logger.root=ERROR
>
> # Logger used by the framework: logger.play=INFO
>
> # Logger provided to your application: logger.application=DEBUG
routes
# Routes
# This file defines all application routes (Higher priority routes first)
# ~~~~
# Home page
GET / controllers.Application.index
POST /bars controllers.Application.addBar
GET /bars controllers.Application.getBars
# Map static resources from the /public folder to the /assets URL path
GET /assets/*file controllers.Assets.at(path="/public", file)
1.sql
# --- First database schema
# --- !Ups
create sequence s_bar_id;
create table bar (
id bigint DEFAULT nextval('s_bar_id'),
name varchar(128)
);
# --- !Downs
drop table bar;
drop sequence s_bar_id;
Global.scala
import org.squeryl.adapters.{H2Adapter, PostgreSqlAdapter}
import org.squeryl.internals.DatabaseAdapter
import org.squeryl.{Session, SessionFactory}
import play.api.db.DB
import play.api.GlobalSettings
import play.api.Application
object Global extends GlobalSettings {
override def onStart(app: Application) {
SessionFactory.concreteFactory = app.configuration.getString("db.default.driver") match {
case Some("org.h2.Driver") => Some(() => getSession(new H2Adapter, app))
case Some("org.postgresql.Driver") => Some(() => getSession(new PostgreSqlAdapter, app))
case _ => sys.error("Database driver must be either org.h2.Driver or org.postgresql.Driver")
}
}
def getSession(adapter:DatabaseAdapter, app: Application) = Session.create(DB.getConnection()(app), adapter)
}
index.scala.html
@(form: play.api.data.Form[Bar])
@main("Welcome to Play 2.0") {
@helper.form(action = routes.Application.addBar) {
@helper.inputText(form("name"))
<input type="submit"/>
}
}
bar.scala
package models
import org.squeryl.{Schema, KeyedEntity}
case class Bar(name: Option[String]) extends KeyedEntity[Long] {
val id: Long = 0
}
object AppDB extends Schema {
val barTable = table[Bar]("bar")
}
application.scala
package controllers
import play.api.mvc._
import com.codahale.jerkson.Json
import play.api.data.Form
import play.api.data.Forms.{mapping, text, optional}
import org.squeryl.PrimitiveTypeMode._
import models.{AppDB, Bar}
object Application extends Controller {
val barForm = Form(
mapping(
"name" -> optional(text)
)(Bar.apply)(Bar.unapply)
)
def index = Action {
Ok(views.html.index(barForm))
}
def addBar = Action { implicit request =>
barForm.bindFromRequest.value map { bar =>
inTransaction(AppDB.barTable insert bar)
Redirect(routes.Application.index())
} getOrElse BadRequest
}
def getBars = Action {
val json = inTransaction {
val bars = from(AppDB.barTable)(barTable =>
select(barTable)
)
Json.generate(bars)
}
Ok(json).as(JSON)
}
Changed the "com.codahale" % "jerkson_2.9.1" % "0.5.0" to "com.cloudphysics" % "jerkson_2.10" % "0.6.3" in the build.sbt file and that allowed me to move on.