Is session[id] a Storage object? If so, if you do session[id].r and r does not exist, the Storage object will return None. If you try to do session[id].r['Nav'], it will attempt to subscript None with 'Nav', which won't work.
Anthony On Tuesday, August 14, 2012 12:36:22 PM UTC-4, Annet wrote: > > I have the following lines of code: > > aboutnav=db((db.NodeNav.nodeID==id)&(db.NodeNav.navID==db.Nav.id > )&(db.Nav.navbarID==ABOUTNAVBARID)).select(db.Nav.ALL,db.NodeNav.ALL,orderby=db.Nav.position).as_list() > if aboutnav: > session[id].aboutnav=True > for r in aboutnav: > if r['Nav']['id']==ABOUTNAVID and r['NodeNav']['frontend']: > session[id].site_menu.append([T(r['Nav']['name']),False,'#']) > elif r['NodeNav']['frontend']: > session[id].about_dropdown.append([T(r['Nav']['name']),False, > URL(r['Nav']['frontendcontroller'],r['Nav']['function'],args=id)]) > session[id].r['Nav']['function']=True > > The last line results in the following error: > > Traceback (most recent call last): > File "/Library/Python/2.5/site-packages/web2py/gluon/restricted.py", line > 205, in restricted > exec ccode in environment > File > "/Library/Python/2.5/site-packages/web2py/applications/bootstrap/controllers/site.py" > <http://127.0.0.1:8000/admin/default/edit/bootstrap/controllers/site.py>, > line 194, in <module> > File "/Library/Python/2.5/site-packages/web2py/gluon/globals.py", line 173, > in <lambda> > self._caller = lambda f: f() > File > "/Library/Python/2.5/site-packages/web2py/applications/bootstrap/controllers/site.py" > <http://127.0.0.1:8000/admin/default/edit/bootstrap/controllers/site.py>, > line 83, in index > session[id].r['Nav']['function']=True > TypeError: 'NoneType' object is unsubscriptable > > > Why can I do session[id].plural=True and can't I do > session[id].r['Nav']['function']=True > > > Annet > > > --
