错误500:处理GroovyPageView时出错:null [英] Error 500: Error processing GroovyPageView: null

问题描述

我正在构建Grails/Groovy/GSP应用程序.

I'm building a Grails/Groovy/GSP app.

我习惯于看到诸如无法在空对象上获取属性'id'"或没有名为...的属性"之类的错误.但是我不确定"null"本身是什么意思！

I'm used to seeing errors such as "Cannot get property 'id' on null object", or "no property named ...". But I'm not sure what "null" by itself means!

错误500:处理GroovyPageView时出错:null

Error 500: Error processing GroovyPageView: null

只是"null".

现在，我了解到完整的错误堆栈将为您提供帮助，并且我仍在研究它以了解错误.但我只是想知道一般来说什么类型的错误就是空".

Now I understand that the full error stack is going to help, and I'm still studying it to understand the error. But I just wonder in general what type of error is just "null".

我注意到的另一件事是，对于有关groovy/gsp页面的错误消息，行号始终完全关闭且无用.

One other thing I noticed is that for error messages regarding groovy/gsp pages, the line numbers are always completely off and useless.

org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error processing GroovyPageView: null

    at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199)

    at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282)

    at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:754)

    at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:684)

    at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:876)

    at java.lang.Thread.run(Thread.java:619)

Caused by: java.lang.NullPointerException

    at gsp_shop_viewCategoryshow_gsp$_run_closure1.doCall(gsp_shop_viewCategoryshow_gsp.groovy:36)

    at gsp_shop_viewCategoryshow_gsp$_run_closure1.doCall(gsp_shop_viewCategoryshow_gsp.groovy)

    at gsp_shop_viewCategoryshow_gsp.run(gsp_shop_viewCategoryshow_gsp.groovy:54)

    ... 6 more

推荐答案

我再次假设您正在使用gsp中的null对象做某事.如果您看不到这种情况，请执行gsp_shop_viewCategoryshow_gsp.groovy并查看第36行上的内容.

I'd again assume you are doing something with a null object in your gsp. If you don't see such a thing, go and fine gsp_shop_viewCategoryshow_gsp.groovy, and see what's there on line 36.

我不确定该文件的确切位置，具体取决于设置，但是请检查您的HOME/.grails文件夹.

I'm not sure exactly where this file would reside, and it depends on the settings, but check your HOME/.grails folder.

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