grailsで奇妙な '不明なプロパティ'エラーが発生しました

Question

私はGrailsに一番の基本的なチュートリアルに従っています。それがうまくいっていますが、次に最も基本的なものに移りました。他の人との関係。

私たちは航空会社タイプのフィールド航空会社を持つクラス旅行を持っていると言う。クラスには他にもいくつかのフィールドがありますが、それらは単なるプリミティブです。

Tripオブジェクトを作成し、航空会社の航空会社のフィールドを新しい航空会社のインスタンスに設定すると、そのコードは正常に実行されます。私はGrailsのアプリ/ confに/ Bootstrap.groovyに次のように置くことで、私がやっている（実行しようとした場合：

Trip t = new Trip (...) 
t.airline = new Airline(...) 
println t.airline 

それは大規模なスタックトレースを持つ巨大なエラーが発生します

org.springframework.beans.factory.access.BootstrapException: Error executing bootstraps; nested exception is org.codehaus.groovy.runtime.InvokerInvocationException: java.lang.NoSuchMethodException: Unknown property 'airline' 
    at org.codehaus.groovy.grails.web.context.GrailsContextLoader.createWebApplicationContext(GrailsContextLoader.java:74) 
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199) 
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45) 
    at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548) 
    at org.mortbay.jetty.servlet.Context.startContext(Context.java:136) 
    at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1234) 
    at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) 
    at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:460) 
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) 
    at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) 
    at org.mortbay.jetty.Server.doStart(Server.java:222) 
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoCachedMethodSiteNoUnwrapNoCoerce.invoke(PojoMetaMethodSite.java:229) 
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:52) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:43) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120) 
    at org.codehaus.groovy.grails.web.container.JettyServer.startServer(JettyServer.groovy:159) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:266) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:51) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:47) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:142) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:150) 
    at org.codehaus.groovy.grails.web.container.JettyServer.start(JettyServer.groovy:114) 
    at grails.web.container.EmbeddableServer$start.call(Unknown Source) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:43) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:128) 
    at _GrailsRun_groovy$_run_closure5_closure11.doCall(_GrailsRun_groovy:145) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:266) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:51) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:47) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:142) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:150) 
    at _GrailsRun_groovy$_run_closure5_closure11.doCall(_GrailsRun_groovy) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Closure.call(Closure.java:274) 
    at groovy.lang.Closure$call.call(Unknown Source) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:43) 
    at groovy.lang.Closure$call.call(Unknown Source) 
    at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:274) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Script.invokeMethod(Script.java:87) 
    at groovy.lang.MetaClassImpl.invokeMethodOnGroovyObject(MetaClassImpl.java:1119) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1023) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:66) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:47) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:142) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:154) 
    at _GrailsRun_groovy$_run_closure5.doCall(_GrailsRun_groovy:137) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Script.invokeMethod(Script.java:87) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:72) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:47) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:142) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:150) 
    at _GrailsRun_groovy.runInline(_GrailsRun_groovy:104) 
    at _GrailsRun_groovy.this$4$runInline(_GrailsRun_groovy) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1009) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.DelegatingMetaClass.invokeMethod(DelegatingMetaClass.java:142) 
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:127) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:66) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:47) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:142) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:162) 
    at _GrailsRun_groovy$_run_closure1.doCall(_GrailsRun_groovy:58) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.DelegatingMetaClass.invokeMethod(DelegatingMetaClass.java:142) 
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:127) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Closure.call(Closure.java:292) 
    at sun.reflect.GeneratedMethodAccessor48.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.DelegatingMetaClass.invokeMethod(DelegatingMetaClass.java:142) 
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:127) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:39) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:43) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:54) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124) 
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure4_closure8_closure9.doCall(GantBinding.groovy:152) 
    at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:266) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:51) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:150) 
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure4_closure8_closure9.doCall(GantBinding.groovy) 
    at sun.reflect.GeneratedMethodAccessor46.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Closure.call(Closure.java:274) 
    at groovy.lang.Closure$call.call(Unknown Source) 
    at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90) 
    at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy) 
    at sun.reflect.GeneratedMethodAccessor40.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1009) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:718) 
    at groovy.lang.GroovyObjectSupport.invokeMethod(GroovyObjectSupport.java:44) 
    at groovy.lang.MetaClassImpl.invokeMethodOnGroovyObject(MetaClassImpl.java:1119) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1023) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:66) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:158) 
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure4_closure8.doCall(GantBinding.groovy:152) 
    at sun.reflect.GeneratedMethodAccessor39.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:266) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:51) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:150) 
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure4_closure8.doCall(GantBinding.groovy) 
    at sun.reflect.GeneratedMethodAccessor38.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Script.invokeMethod(Script.java:87) 
    at groovy.lang.MetaClassImpl.invokeMethodOnGroovyObject(MetaClassImpl.java:1119) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1023) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.DelegatingMetaClass.invokeMethod(DelegatingMetaClass.java:142) 
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:127) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:66) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:47) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:142) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:146) 
    at RunApp$_run_closure1.doCall(RunApp.groovy:33) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.DelegatingMetaClass.invokeMethod(DelegatingMetaClass.java:142) 
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:127) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Closure.call(Closure.java:292) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.DelegatingMetaClass.invokeMethod(DelegatingMetaClass.java:142) 
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:127) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:39) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:43) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:54) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124) 
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure4_closure8_closure9.doCall(GantBinding.groovy:152) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:266) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:51) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:150) 
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure4_closure8_closure9.doCall(GantBinding.groovy) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Closure.call(Closure.java:274) 
    at groovy.lang.Closure$call.call(Unknown Source) 
    at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90) 
    at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1009) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:718) 
    at groovy.lang.GroovyObjectSupport.invokeMethod(GroovyObjectSupport.java:44) 
    at groovy.lang.MetaClassImpl.invokeMethodOnGroovyObject(MetaClassImpl.java:1119) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1023) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:66) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:158) 
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure4_closure8.doCall(GantBinding.groovy:152) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:266) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:51) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:150) 
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure4_closure8.doCall(GantBinding.groovy) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Closure.call(Closure.java:274) 
    at groovy.lang.Closure$call.call(Unknown Source) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:43) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120) 
    at gant.Gant$_dispatch_closure4.doCall(Gant.groovy:324) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Closure.call(Closure.java:292) 
    at groovy.lang.Closure$call$0.call(Unknown Source) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:43) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124) 
    at gant.Gant$_dispatch_closure6.doCall(Gant.groovy:334) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:266) 
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:51) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:47) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:142) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:150) 
    at gant.Gant$_dispatch_closure6.doCall(Gant.groovy) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86) 
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1061) 
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:893) 
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:892) 
    at groovy.lang.Closure.call(Closure.java:279) 
    at groovy.lang.Closure.call(Closure.java:274) 
    at groovy.lang.Closure$call.call(Unknown Source) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:43) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120) 
    at gant.Gant.withBuildListeners(Gant.groovy:344) 
    at gant.Gant.this$2$withBuildListeners(Gant.groovy) 
    at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source) 
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:47) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:142) 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:150) 
    at gant.Gant.dispatch(Gant.groovy:334) 
    at gant.Gant.this$2$dispatch(G 

Answer 1

ルックス。あなたの旅行のクラスのように「航空会社」性質を持っていない

を、私は以下のクラスを持っている場合は、それが正常に動作します：。

// grails-app/domain/Trip.groovy 
class Trip { 
String name 

static belongsTo = [airline: Airline] 

String toString() { name } 
} 

// grails-app/domain/Airline.groovy 
class Airline { 
String name 

static hasMany = [trips: Trip] 

String toString() { name } 
} 

はその後、「Grailsのコンソール」を開くと、このコードを実行します。

Trip t = new Trip(name: "my trip") 

t.airline = new Airline(name: "Delta") 

assert "Delta" == t.airline.name 

詳細はOne-to-many Grailsのドキュメントをチェックしてください。