python pyramid, render user dashboard at root url when logged in

Question

How is it possible within a pyramid app to render a logged in users dashboard at the root url? When not logged in the root url shows a sign in form.

After searching I've only found examples for other frameworks.

Answer 1

You can simply do:

@view_config(route_name='home', renderer='dashboard.jinja2')
def home_view(request):
    if request.authenticated_userid is None:
        # most people would probably opt to redirect to the login url
        # here instead of rendering a response, but you asked
        return render_to_response('login.jinja2', {}, request=request)
    # user is logged in, so use the dashboard renderer
    return {}

HOWEVER, pyramid is cool and has predicates. Neat. So we can use the effective_principals predicate to dispatch between 2 different views based on whether the user is logged in:

from pyramid.security import Authenticated

@view_config(route_name='home', effective_principals=Authenticated, renderer='dashboard.jinja2')
def dashboard_view(request):
    return {}

@view_config(route_name='home', renderer='login.jinja2')
def login_from_home_view(request):
    return {}