[web2py] Custom links for SQLFORM.grid

[Jim Steil]

Hi

I'm using the following to generate custom links for my SQLFORM.smartgrid:
    actions = dict()
    nextActions = db(db.requisitionStatus.nextFunctionLabel>0).select()
    for nextAction in nextActions:
        actions[nextAction.requisitionStatusId] = 
dict(label=nextAction.nextFunctionLabel,
                                                       
action=nextAction.nextFunction)
    links = [lambda row: A(actions[row.requisitionStatusId]['label'],
                           
_href=URL(actions[row.requisitionStatusId]['action'],args=[row.id]))]

This is all working fine to generate the buttons I need.  My problem is 
that for some of my requisitionStatus records I don't want any button at 
all to appear for that row.  I can't figure out how to do it.  I've tried:

    links = [lambda row: A(actions[row.requisitionStatusId]['label'],
                           
_href=URL(actions[row.requisitionStatusId]['action'],args=[row.id])) if 
actions[row.requisitionStatusId]['label'] != '' else None]

but that just generates a button with the text of 'None'.  I'm not that 
good with lambda functions and was wondering if there was a way that I 
could have no button generated somehow.

    -Jim