使用GroovyPagesTemplateEngine时缺少taglib(Missing taglib when using GroovyPagesTemplateEngine)

 我一直在通过我自己的taglib中的标签处理动态GSP内容，使用如下代码可以很好地工作： 
 
    def GroovyPagesTemplateEngine groovyPagesTemplateEngine
    ...
    def processGSPContent(model, name, out) {
        log.debug("model is $model")
        Template t = groovyPagesTemplateEngine.createTemplate(model.content, name + ".gsp")
        Writable w = t.make(model: model)
        w.writeTo(out)
    }
 
 现在我不是100％确定如何找到像taglibs这样的各种资源，但是我所有的taglib都能像正常的grails库一样正常工作。 
 
 我AcegiSecurity的问题是AcegiSecurity的标签在以这种方式处理的内容中找不到：例如， 
 
<g:isLoggedIn>
   You're logged in :-)
</g:isLoggedIn>
 
 那么如何让GroovyPagesTemplateEngine找到AcegiSecurity标签？ 我猜这可能与ApplicationContext或ServletContext 。 
 
 编辑---看起来像它可能是一个重载的命名空间问题： 
 
    Caused by: org.codehaus.groovy.grails.web.taglib.exceptions.GrailsTagException: Tag [ifnotloggedin] does not exist. 
No tag library found for namespace: g at home_pmcneil_devel_Groupie_grails_app_views_display_page_gsp.run(home_pmcneil_devel_Groupie_grails_app_views_display_page_gsp:32) 

I've been processing dynamic GSP content via tags in my own taglib which works just fine using code like:
 
    def GroovyPagesTemplateEngine groovyPagesTemplateEngine
    ...
    def processGSPContent(model, name, out) {
        log.debug("model is $model")
        Template t = groovyPagesTemplateEngine.createTemplate(model.content, name + ".gsp")
        Writable w = t.make(model: model)
        w.writeTo(out)
    }
 
Now I'm not 100% sure on how various resources like taglibs are found, but all my taglibs work fine as do the normal grails libs.
 
The problem I have is that AcegiSecurity's tags aren't found in content processed this way: e.g.
 
<g:isLoggedIn>
   You're logged in :-)
</g:isLoggedIn>
 
so how do I get GroovyPagesTemplateEngine to find the AcegiSecurity tags? I'm guessing it may be something to do with ApplicationContext or ServletContext.
 
edit--- Looks like it might be an overloaded namespace problem: 
 
    Caused by: org.codehaus.groovy.grails.web.taglib.exceptions.GrailsTagException: Tag [ifnotloggedin] does not exist. 
No tag library found for namespace: g at home_pmcneil_devel_Groupie_grails_app_views_display_page_gsp.run(home_pmcneil_devel_Groupie_grails_app_views_display_page_gsp:32) 

原文：https://stackoverflow.com/questions/1616861