Hi,
I'm using Pyramid 1.0 for a toy project, and I'm confused about the
view lookup process. I've put a complete script showing my problem at
http://pylonshq.com/pasties/45e916782bf3e2896b94ea2e7a0fc13d
I'm using traversal, and I'd like to be able to ensure trailing
slashes on certain resources. As far as I can tell,
append_slash_notfound_view is only relevant when using URL dispatch,
so instead I'm trying to use view predicates.
I've created a marker interface for resources which should have
trailing slashes (IContainer), and the following view configuration:
@view_config(context=IContainer,
path_info='.*[^/]$')
def add_trailing_slash(request):
# HTTPTemporaryRedirect supports an 'add_slash' parameter, but we
# can't use it in Pyramid because it only takes effect when the
# exception is called (as a WSGI app), and Pyramid doesn't call
# it.
location = request.path_url + '/'
if request.environ.get('QUERY_STRING'):
location += '?' + req.environ['QUERY_STRING']
return exc.HTTPTemporaryRedirect(location=location)
This seems to work until I add a view configuration for a specific
resource class, even though that configuration includes a path_info
predicate which only matches with a trailing slash:
# A view that should match Resource objects, but only when the URL
ends
# with a trailing slash
@view_config(context=Resource,
path_info='.*/$')
def view_child(context, request):
page = """
<a href="child">Child without slash</a>
<br>
<a href="child/">Child with slash</a>
"""
return Response(page)
With that view in place, if I visit "/child/" I get the page I expect,
but if I visit "/child" (no slash) I get the following error:
predicate mismatch for view <function view_child at 0x92b93e4>
If I use the interface in both view configurations, everything is
fine, and if I use the Resource class in both places, it's also fine.
But I can't seem to use them both together.
(I've also tried custom_predicates instead of path_info, with the same
effect)
Is this expected behaviour, and if so, does anyone have any
suggestions for how I can achieve the trailing slash behaviour that I
want?
Thanks a lot,
Simon
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