Question

2.0.1 我确定了以下路线:

GET  /demo/list controllers.Demos.listDemos(page: Int ?= 0, orderBy: Int ?= 1, nameFilter: String ?= "", versionFilter: Long ?= -1, tagFilter: List[String] ?= Nil)

但我把这一错误汇编成册:

No QueryString binder found for type List[String]. Try to implement an implicit QueryStringBindable for this type.

我发现,Meron 2.1-RC(尚未正式发布)的守则将解决这一问题:

/**
* QueryString binder for List
*/
  implicit def bindableList[T: QueryStringBindable] = new QueryStringBindable[List[T]] {
    def bind(key: String, params: Map[String, Seq[String]]) = Some(Right(bindList[T](key, params)))
    def unbind(key: String, values: List[T]) = unbindList(key, values)
  }

  /**
* QueryString binder for java.util.List
*/
  implicit def bindableJavaList[T: QueryStringBindable] = new QueryStringBindable[java.util.List[T]] {
    def bind(key: String, params: Map[String, Seq[String]]) = Some(Right(bindList[T](key, params).asJava))
    def unbind(key: String, values: java.util.List[T]) = unbindList(key, values.asScala)
  }

  private def bindList[T: QueryStringBindable](key: String, params: Map[String, Seq[String]]): List[T] = {
    for {
      values <- params.get(key).toList
      rawValue <- values
      bound <- implicitly[QueryStringBindable[T]].bind(key, Map(key -> Seq(rawValue)))
      value <- bound.right.toOption
    } yield value
  }

  private def unbindList[T: QueryStringBindable](key: String, values: Iterable[T]): String = {
    (for (value <- values) yield {
      implicitly[QueryStringBindable[T]].unbind(key, value)
    }).mkString("&")
  }

但是,在经过两小时的尝试之后,“游戏”仍未找到该守则。我先尝试使用习惯物和含蓄地向该物体转化,但是它仍然不工作。

How can I force Play to do the implicit conversion?

<>Update>

我想尽可能避免2.1-SNAPSHOT,因为我担心其稳定,但如果没有其他办法,我将使用。我从4e6处尝试了解决办法,但并没有做到:

[warn]  ::::::::::::::::::::::::::::::::::::::::::::::                                 
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: org.slf4j#slf4j-api;1.6.1: configuration not found in org.slf4j#slf4j-api;1.6.1:  compile . It was required from org.hibernate#hibernate-validator;4.2.0.Final compile
[warn]  :: commons-codec#commons-codec;1.4: configuration not found in commons-codec#commons-codec;1.4:  compile . It was required from org.apache.httpcomponents#httpclient;4.1.2 compile
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::

我的精彩 p包括:

// Comment to get more information during initialization
logLevel := Level.Warn

// The Typesafe repository
resolvers ++= Seq(
  Resolver.url("Typesafe Ivy Snapshots", url("http://repo.typesafe.com/typesafe/ivy-snapshots/"))(Resolver.ivyStylePatterns),
  "Typesafe Releases" at "http://repo.typesafe.com/typesafe/releases/",
  "Typesafe Snapshots" at "http://repo.typesafe.com/typesafe/snapshots/",
  "DefaultMavenRepository" at "http://repo1.maven.org/maven2/",
  "JavaNet1Repository" at "http://download.java.net/maven/1/")

// Use the Play sbt plugin for Play projects
addSbtPlugin("play" % "sbt-plugin" % "2.1-SNAPSHOT")

Answer 1

我最后解决了这个问题。使用的法典是:

http://www.ohchr.org。

package models

import play.api.mvc.{JavascriptLitteral, QueryStringBindable}


/**
 * Created with IntelliJ IDEA.
 * User: pvillega
 * Date: 07/05/12
 * Time: 12:06
 * QueryStringBinders for some data types missing in 2.0.1
 */
//TODO: remove when updating to 2.1
object QueryBinders {

  /**
   * QueryString binder for List
   */
  implicit def bindableList[T: QueryStringBindable] = new QueryStringBindable[List[T]] {
    def bind(key: String, params: Map[String, Seq[String]]) = Some(Right(bindList[T](key, params)))
    def unbind(key: String, values: List[T]) = unbindList(key, values)
  }

  private def bindList[T: QueryStringBindable](key: String, params: Map[String, Seq[String]]): List[T] = {
    for {
      values <- params.get(key).toList
      rawValue <- values
      bound <- implicitly[QueryStringBindable[T]].bind(key, Map(key -> Seq(rawValue)))
      value <- bound.right.toOption
    } yield value
  }

  private def unbindList[T: QueryStringBindable](key: String, values: Iterable[T]): String = {
    (for (value <- values) yield {
      implicitly[QueryStringBindable[T]].unbind(key, value)
    }).mkString("&")
  }

  /**
   * Convert a Scala List[T] to Javascript array
   */
  implicit def litteralOption[T](implicit jsl: JavascriptLitteral[T]) = new JavascriptLitteral[List[T]] {
    def to(value: List[T]) = "[" + value.map { v => jsl.to(v)+"," } +"]"
  }

}

www.un.org/french/ga/president

 val main = PlayProject(appName, appVersion, appDependencies, mainLang = SCALA).settings(
      // Add your own project settings here
      lessEntryPoints <<= baseDirectory(_ / "app" / "assets" / "stylesheets" ** "style.less"),
      routesImport += "models.QueryBinders"
    )

在更新至2.1时,必须取消这一规定,但这样做是行之有效的,避免了我试图将该项目更新到2.1Snapshot的所有问题。

Answer 2

您可以转而使用<代码>2.1-SNAPSHOT(见,“在没有安装“游戏”的情况下提出新申请”。你们都需要修改<代码>t-plugin版本,并增加额外决心者。页: 1

resolvers ++= Seq(
  Resolver.url("Typesafe Ivy Snapshots", url("http://repo.typesafe.com/typesafe/ivy-snapshots/"))(Resolver.ivyStylePatterns),
  "Typesafe Releases" at "http://repo.typesafe.com/typesafe/releases/",
  "Typesafe Snapshots" at "http://repo.typesafe.com/typesafe/snapshots/",
  "Codahale Repo" at "http://repo.codahale.com")

addSbtPlugin("play" % "sbt-plugin" % "2.1-SNAPSHOT")

Update

我不知道你为什么对<代码>slf4j依附有问题。该系统成功地从向我下载的各类安全产品中下载。您可尝试在您的申请书中明确添加这一存放处(我指的是:,而不是plugins.sbt)。

[info] downloading http://repo.typesafe.com/typesafe/releases/org/slf4j/slf4j-api/1.6.1/slf4j-api-1.6.1.jar ...
[info]  [SUCCESSFUL ] org.slf4j#slf4j-api;1.6.1!slf4j-api.jar (538ms)

Update

友情链接