Question

我通过执行以下操作将Grails 1.3.7应用升级到Grails 2.2

将GRAILS_HOME变量设置为Grails 2.2的位置
编辑路径以引用此位置
跑grails upgrade
编辑application.properties以删除所有插件引用
编辑Build.config以创建plugins封闭以引用我的插件
跑grails clean
跑grails compile

步骤7因以下错误而失败：

C:\code\querium\AppServer-grails-2>grails compile --stacktrace
| Compiling 98 source files
| Warning The [executeSafely] action accepts a parameter of type [groovy.lang.Closure] which has not been marked with @V
alidateable.  Data binding will still be applied to this command object but the instance will not be validateable.

       def executeSafely(Closure c) {
       ^
| Warning The [executeSafely] action accepts a parameter of type [groovy.lang.Closure] which has not been marked with @V
alidateable.  Data binding will still be applied to this command object but the instance will not be validateable.

        def executeSafely(Closure c) {
    ^
| Warning The [increment] action accepts a parameter of type [java.util.Map] which has not been marked with @Validateabl
e.  Data binding will still be applied to this command object but the instance will not be validateable.

        def increment(Map map, String t, int index) {
    ^
| Compiling 98 source files.
| Error Fatal error during compilation org.apache.tools.ant.BuildException: Compilation Failed (NOTE: Stack trace has be
en filtered. Use --verbose to see entire trace.)
java.lang.NullPointerException
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.codehaus.gant.GantBuilder.invokeMethod(GantBuilder.java:99)
        at _GrailsCompile_groovy$_run_closure2_closure6_closure7.doCall(_GrailsCompile_groovy:48)
        at _GrailsCompile_groovy$_run_closure2_closure6_closure7.doCall(_GrailsCompile_groovy)
        at _GrailsCompile_groovy.withCompilationErrorHandling(_GrailsCompile_groovy:69)
        at _GrailsCompile_groovy.this$4$withCompilationErrorHandling(_GrailsCompile_groovy)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:168)
        at _GrailsCompile_groovy$_run_closure2_closure6.doCall(_GrailsCompile_groovy:47)
        at _GrailsCompile_groovy$_run_closure2_closure6.doCall(_GrailsCompile_groovy)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
        at _GrailsCompile_groovy$_run_closure2.doCall(_GrailsCompile_groovy:46)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:1
85)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
        at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
        at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
        at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
        at gant.Gant.withBuildListeners(Gant.groovy:427)
        at gant.Gant.this$2$withBuildListeners(Gant.groovy)
        at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
        at gant.Gant.dispatch(Gant.groovy:415)
        at gant.Gant.this$2$dispatch(Gant.groovy)
        at gant.Gant.invokeMethod(Gant.groovy)
        at gant.Gant.executeTargets(Gant.groovy:591)
        at gant.Gant.executeTargets(Gant.groovy:590)
| Error Fatal error during compilation org.apache.tools.ant.BuildException: Compilation Failed

我不确定真正的错误在哪里，以及如何纠正它。我很乐意忽略这些警告，除非有充分理由解决这些警告。（如果是这样，怎么样？）

Answer 1

我不确定NPE，但警告是由控制器中的公共方法引起的。无法从应用程序代码中调用控制器，因此公共方法没有意义。在2.0以上的操作中，除了闭包之外，现在可以使用方法，因此您的帮助方法被误解为控制器操作。让它们变得私密，警告就会消失，而NPE也是如此。

docs btw中有升级信息：）

Gant在编译升级的grails应用程序时抛出NullPointerException

1 个答案: