[web2py] How to send an URL() from a view to a controller?

[Sverre]

I want to implement a function to back to previous page. For example
from documents back to device or from documents back to workorder. So
I have to send an url from the device view  or the workorder view to
the controller of the documents, to implement this functionality. I
tried to put  the result of the URL()-function into args, but this is
not working.