I did try with a computed field, but it did not work. It kept giving None 
as the value. Here is what I've tried so far: 

Field('name', compute=lambda r: 'Node ' + r['id'] or 'Node'), 

and 

Field('name', default=lambda r: 'Node ' + r['id'] or 'Node'), 

I understand that *default* does not take arguments, but *compute* did not 
work for me either. Can you include an example so I am sure to try the 
exact syntax you're suggesting? 

Thanks, 
Matthew

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