Getting the current user/principal
==================================

You often might want to get the user currently accessing your page. The best way
is to fetch the user (or principal) is via the page's request. It's done like this:

.. code-block:: python
    
    self.request.principal
    
If you don't have a request at hand (you really should have one) you can use this
somewhat hackish workaround:

.. code-block:: python
    
    import zope.security
    principal=zope.security.management.getInteraction().participations[0].principal
    
If you are using Dolmen and menhir.contenttype.user you can use code like this to
get the menhir.contenttype.user.User object:

.. code-block:: python
    
    def getCurrentUser(request):
        # todo: could use principal.id instead of this magic looking stuff
        return request.principal.__parent__[request.principal.__name__]