Re: Data model traverse

Thanks Daniel.  Maybe data_model has been overridden then, because when I use
your suggestion this is the error I encounter:

Caused by: freemarker.template.TemplateException: Expected extended hash.
.data_model evaluated instead to freemarker.co
re.Environment$1 on line 3, column 10 in appfuse/web/struts/action-test.ftl.
        at
freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:135)
        at
freemarker.core.BuiltIn$keysBI._getAsTemplateModel(BuiltIn.java:594)
        at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
        at freemarker.core.IteratorBlock.accept(IteratorBlock.java:87)
        at freemarker.core.Environment.visit(Environment.java:196)
        at freemarker.core.MixedContent.accept(MixedContent.java:92)
        at freemarker.core.Environment.visit(Environment.java:196)
        at freemarker.core.Environment.process(Environment.java:176)
        at freemarker.template.Template.process(Template.java:232)
        at
org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelper.java:255)


But it's not clear to me in looking at the Template.process() call, if this
is really happening.  

The process(java.lang.Object, java.io.Writer)  method is being given a
freemarker.template.SimpleHash, defined as 
        getContext().put("version", Version.getDefault());
        getContext().put("ctx", getContext());
        getContext().put("templates", new Templates());
        getContext().put("date", new SimpleDate(new Date(), 3));

and I don't see anything else being done at the top level.  I haven't
figured out yet how the data model name gets set - what should I look for? 




Daniel Dekany wrote:
> 
> Wednesday, March 25, 2009, 9:50:38 PM, wkbutler wrote:
>>
>> Hi -
>> I know this has been asked before, but I have not seen an answer that
>> seems
>> to work for me.  I am looking to discover the contents of the data model
>> during template processing time, just for the purpose of setting up a
>> debugging FTL template.
>>
>> Is there a constant keyword for the root of the model?  
>>
>> I have seen .data_model used but for me that was an Environment object
>> (and
> 
> You have overlooked something there; .data_model is the root of the
> data-model itself. It's not an Environment object (of course, unless
> someone uses the Environment object as the data-model parameter in
> Template.process... but that's at best unusual.)
> 
>> accessing .data_model.dataModel as I thought should have been
>> possible, according to the freemarker.core.Environment API, result
>> in an 'undefined' error).
>>
>> This thread asks the same question
>> http://www.nabble.com/traverse-the-data-tree-td6874906.html#a6874906
>>
>> and Attila mentions it's possible but unfortunately did not
>> elaborate. Using <#recurse> is apparently valid but for me resulted
>> in an error also.
> 
> #recurse only works for FTL node values, like wrapped XML-s. I doesn't
> work for plain hashes and like. You should use ?keys on them, like:
> 
> <p>The variables in the data-model are:
> <ul>
>   <#list .data_model?keys as key>
>     <li>${key?html}
>   </#list>
> </ul>
> 
>> Thanks for any advice!
> 
> -- 
> Best regards,
>  Daniel Dekany
> 
> 
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