Re: Dynamic list

Hi Daniel,

Here is the scenario. Let's say I have this XML as an input (data- 
model):
<root>
	<parent1>
		<child1>text</child1>
		<child1>text</child1>
	</parent1>
	<parent2>text</parent2>
	<parent2>text</parent2>
	<parent2>text</parent2>
</root>

Based on the template I use and more specifically, this part  
(simplified):

<#macro @element>
    <#-- this emits an opening tag -->
    <${.node?node_name} <#if!.node?children?has_content>/</#if>>

    <#-- this emits variable name, with proper formatting -->
    <#if .node?children?size = 1>
        ${r"${"}${.node?node_name}${r"}"}
    </#if>

    <#if .node?children?size &gt; 0>
        <#recurse>
    </#if>

    <#-- this emits closing tag -->
    <#if .node?children?has_content>
    </${.node?node_name}>
    </#if>
</#macro>


The output will be this:

<root>
	<parent1>
		<child1>${child1}</child1>
		<child1>${child1}</child1>
	</parent1>
	<parent2>${child2}</parent2>
	<parent2>${child2}</parent2>
	<parent2>${child2}</parent2>
</root>
		
What I'd like to achieve is this:

<root>
	<parent1>
		<#list child1 as childItem1>
			<child1>${childItem1}</child1>
		</#list>
	</parent1>
	<#list parent2 as parentItem2>
		<parent2>${parentItem2}
	</#list>
</root>

So, basically, instead of outputting tags with the same name, create a  
list of such items.

In this particular case, Freemarker has to detect if there is more  
than one element with a same name,
and if there is - create a list of those elements.

I've managed to find a workaround, with a simple test variable, and by  
appending [0], [1], etc to variable names.
But <#list> should look a lot better though, and easier to understand  
for template users.


Thanks again for your input.

Cheers,
Kirill



On Feb 25, 2009, at 2:38 AM, Daniel Dekany wrote:

> Wednesday, February 25, 2009, 2:55:12 AM, Kirill wrote:
>
>> Hi All,
>>
>> I've been fighting with this for a while and now out looking for  
>> help.
>>
>> I am creating a generic template, used to work with XML data model.
>> Here is how the template looks right now:
>>
>> <#ftl>
>>
>> <#-- this will be a Freemarker Template -->
>> <#noparse><#ftl ns_prefixes={"D":"http://our.site.com/ns"}></ 
>> #noparse>
>>
>> <#list .data_model?keys as key>
>>  <#if .data_model[key]?is_node>
>>    <#recurse .data_model[key]>
>>  </#if>
>> </#list>
>>
>> <#macro @element>
>>    <${.node?node_name} <@attributes/><#if
>> !.node?children?has_content>/</#if>>
>>
>>    <#if .node?children?size = 1>
>>        ${r"${"}${varPath}.<@nodePath/>${.node?node_name}${r"}"}
>>    </#if>
>>
>>    <#if .node?children?size &gt; 0>
>>        <#recurse>
>>    </#if>
>>
>>    <#if .node?children?has_content>
>>    </${.node?node_name}>
>>    </#if>
>> </#macro>
>>
>> <#macro @text>
>> </#macro>
>>
>> <#macro attributes>
>>    <#if .node.@@?has_content>
>>        <@compress single_line=true>
>>            <#list .node.@@ as attribute>
>>
>> ${attribute?node_name}=${r"${"}${varPath}.<@nodePath/>${.node? 
>> node_name}.@${attribute?node_name}${r"}"}
>>            </#list>
>>        </@compress>
>>    </#if>
>> </#macro>
>>
>> <#macro nodePath>
>>    <@compress single_line=true>
>
> (I don't think you need this @compress, since you are already using
> <#t>.)
>
>>        <#list .node?ancestors?reverse as node>
>>            <#if node?node_type = 'element'>
>>                ${node?node_name}.<#t>
>>            </#if>
>>        </#list>
>>    </@compress>
>> </#macro>
>>
>>
>> And here is where I'm stuck. Sometimes, there are multiple @element's
>> out there, for example, XML looks like this:
>> <root>
>>   <parent>
>>       <child/>
>>       <child/>
>>       <child/>
>>   </parent>
>> </root>
>>
>> With the current template, in the output I'm getting all of the
>> <child> nodes, and all of them have same variable names, of course.
>> What I need to do - is create a list of those nodes, so the result is
>> smth like: <#list nodes as node>${node?node_name}</#list>
>>
>> How can I create such a list, without breaking the <#macro  
>> @element> ?
>> Or, if this needs to be re-done, what's the best possible way here?
>
> I'm not sure what you want to achieve... demonstrate the problem with
> a more bare-bone example, because I don't think others will follow
> either.
>
>> Thanks a bunch for all the help.
>>
>> - Kirill
>>
>> ------------------------------------------------------------------------------
>> Open Source Business Conference (OSBC), March 24-25, 2009, San  
>> Francisco, CA
>> -OSBC tackles the biggest issue in open source: Open Sourcing the  
>> Enterprise
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>>
>
> -- 
> Best regards,
> Daniel Dekany
>
>
> ------------------------------------------------------------------------------
> Open Source Business Conference (OSBC), March 24-25, 2009, San  
> Francisco, CA
> -OSBC tackles the biggest issue in open source: Open Sourcing the  
> Enterprise
> -Strategies to boost innovation and cut costs with open source  
> participation
> -Receive a $600 discount off the registration fee with the source  
> code: SFAD
> http://p.sf.net/sfu/XcvMzF8H
> _______________________________________________
> FreeMarker-user mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/freemarker-user


------------------------------------------------------------------------------
Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA
-OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise
-Strategies to boost innovation and cut costs with open source participation
-Receive a $600 discount off the registration fee with the source code: SFAD
http://p.sf.net/sfu/XcvMzF8H