不能用Lift和Scala.js构建一个简单的项目
不能用Lift和Scala.js构建一个简单的项目
提问于 2015-10-30 08:39:16
我做了一个简单的项目：https://github.com/eje211/scalajswithlift
我尝试用Lift创建一个JSON对象，并使用Scala.js在HTML中打印它。但我知道这个错误：
[info] Compiling 1 Scala source to /Users/eeytan/src/scalajs/target/scala-2.11/classes...
[info] Fast optimizing /Users/eeytan/src/scalajs/target/scala-2.11/scala-js-tutorial-fastopt.js
[error] Referring to non-existent class Lnet_liftweb_json_JsonDSL$
[error] called from Ltutorial_webapp_TutorialApp$.main__V
[error] called from sjs_js_JSApp$class.$$js$exported$meth$main__sjs_js_JSApp__O
[error] called from Ltutorial_webapp_TutorialApp$.$$js$exported$meth$main__O
[error] called from Ltutorial_webapp_TutorialApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] Ltutorial_webapp_TutorialApp$
[error] Referring to non-existent class Lnet_liftweb_json_package$
[error] called from Ltutorial_webapp_TutorialApp$.main__V
[error] called from sjs_js_JSApp$class.$$js$exported$meth$main__sjs_js_JSApp__O
[error] called from Ltutorial_webapp_TutorialApp$.$$js$exported$meth$main__O
[error] called from Ltutorial_webapp_TutorialApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] Ltutorial_webapp_TutorialApp$
[error] Referring to non-existent class Lnet_liftweb_json_JsonAST$
[error] called from Ltutorial_webapp_TutorialApp$.main__V
[error] called from sjs_js_JSApp$class.$$js$exported$meth$main__sjs_js_JSApp__O
[error] called from Ltutorial_webapp_TutorialApp$.$$js$exported$meth$main__O
[error] called from Ltutorial_webapp_TutorialApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] Ltutorial_webapp_TutorialApp$
[error] Referring to non-existent method Lnet_liftweb_json_JsonAST$.render__Lnet_liftweb_json_JsonAST$JValue__s_text_Document
[error] called from Ltutorial_webapp_TutorialApp$.main__V
[error] called from sjs_js_JSApp$class.$$js$exported$meth$main__sjs_js_JSApp__O
[error] called from Ltutorial_webapp_TutorialApp$.$$js$exported$meth$main__O
[error] called from Ltutorial_webapp_TutorialApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] Ltutorial_webapp_TutorialApp$
[error] Referring to non-existent method Lnet_liftweb_json_JsonDSL$.int2jvalue__I__Lnet_liftweb_json_JsonAST$JInt
[error] called from Ltutorial_webapp_TutorialApp$.main__V
[error] called from sjs_js_JSApp$class.$$js$exported$meth$main__sjs_js_JSApp__O
[error] called from Ltutorial_webapp_TutorialApp$.$$js$exported$meth$main__O
[error] called from Ltutorial_webapp_TutorialApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] Ltutorial_webapp_TutorialApp$
[error] Referring to non-existent method Lnet_liftweb_json_JsonDSL$.pair2Assoc__T2__F1__Lnet_liftweb_json_JsonDSL$JsonAssoc
[error] called from Ltutorial_webapp_TutorialApp$.main__V
[error] called from sjs_js_JSApp$class.$$js$exported$meth$main__sjs_js_JSApp__O
[error] called from Ltutorial_webapp_TutorialApp$.$$js$exported$meth$main__O
[error] called from Ltutorial_webapp_TutorialApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] Ltutorial_webapp_TutorialApp$
[error] Referring to non-existent method Lnet_liftweb_json_JsonDSL$.string2jvalue__T__Lnet_liftweb_json_JsonAST$JString
[error] called from Ltutorial_webapp_TutorialApp$.main__V
[error] called from sjs_js_JSApp$class.$$js$exported$meth$main__sjs_js_JSApp__O
[error] called from Ltutorial_webapp_TutorialApp$.$$js$exported$meth$main__O
[error] called from Ltutorial_webapp_TutorialApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] Ltutorial_webapp_TutorialApp$
[error] Referring to non-existent method Lnet_liftweb_json_package$.pretty__s_text_Document__T
[error] called from Ltutorial_webapp_TutorialApp$.main__V
[error] called from sjs_js_JSApp$class.$$js$exported$meth$main__sjs_js_JSApp__O
[error] called from Ltutorial_webapp_TutorialApp$.$$js$exported$meth$main__O
[error] called from Ltutorial_webapp_TutorialApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] Ltutorial_webapp_TutorialApp$
[trace] Stack trace suppressed: run last compile:fastOptJS for the full output.
[error] (compile:fastOptJS) There were linking errors
[error] Total time: 1 s, completed Oct 30, 2015 5:21:03 PM我不明白为什么。
如果我从build.sbt中删除注释，就会得到以下错误：
> ~fastOptJS
[trace] Stack trace suppressed: run last compile:scalaJSPreLinkClasspath for the full output.
[error] (compile:scalaJSPreLinkClasspath) org.scalajs.core.tools.classpath.JSLibResolveException: Some references to JS libraries could not be resolved:
[error] - Ambiguous reference to a JS library: jquery.js
[error] Possible paths found on the classpath:
[error] - scala/tools/nsc/doc/html/resource/lib/jquery.js
[error] - META-INF/resources/webjars/jquery/2.1.3/jquery.js
[error] originating from: scalajs:compile
[error] Total time: 1 s, completed Oct 30, 2015 5:35:09 PM我不明白怎么回事。我不能在Scala.js中使用Lift JSON吗？
Stack Overflow用户
发布于 2015-10-30 09:22:48
Lift和Lift JSON是JVM专用的项目。据我所知，它们不是为Scala.js移植/构建的。因此，不可以在Scala.js中使用它们。
一般来说，库需要交叉编译并发布给Scala/JVM和Scala.js，以便您能够使用它们。如果这有意义的话，您可以要求Lift开发人员交叉编译(一些)他们的库。
也就是说，在Scala.js中，您通常可以使用JSON来处理JSON数据结构：
import scala.scalajs.js
import js.Dynamic.{literal => lit}
val j = lit(a = 2, b = "Hello.")
println(js.JSON.stringify(j, space = 2))而且，通常情况下，您甚至根本不会直接操作JSON。相反，您将使用Scala.js可用的任何序列化库，例如uPickle、刺刺或BooPickle。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/33431721
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