[Zope] saving/creating an object to an exsisting folderish object

[Allen Huang]

This is a problem a got a lot and I never able to seem to solve it. 
I want save or create a object to a specific folder or other folderish object, 
        I ask the user for the id of that folder or folderish object
                I store the id name in a variable 'name'

the problem is I know the type of the folder or folderish object but 'name' is a str object and I can't use command like name.manage_addFile().
The server just tells me that name is a str which contains no function manage_addFile().

I always end up doing a 
<dtml-in "objectValues(['Folder'])">
    <dtml-if "getId() == name">
        do something....
    </dtml-if>
</dtml-in>


this is very ineffecient when you have a lot of data. Is there a ways I could do something like "getFolder( name ).doSomething()". Is there anything like that in dtml?

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