Hi,
i am writing a space blueprint with the help of the "Write a simple Confluence Space blueprint" tutorial. I now need to write a template which contains the tasks-report-macro but i have a problem with getting the space-key as a parameter inside the macro.
Using <at:var at:name="key"/> doesn't work. When i look at the storage format of the created template the spaces-parameter looks like this: <ac:parameter ac:name="spaces" />
My (not working) code looks like this:
<ac:structured-macro ac:name="tasks-report-macro">
<ac:parameter ac:name="spaces"><at:var at:name="key"/></ac:parameter>
<ac:parameter ac:name="pageSize">10</ac:parameter>
<ac:parameter ac:name="labels">product-requirements</ac:parameter>
</ac:structured-macro>
Thanks for you help! 
