Fix a trailing slash bug for `RestController`s that have a `_lookup` method.

Change-Id: Ibd025fc52d37f58644de23cf283afd8d4d55e2d1
Closes-Bug: #1280003

pecan/rest.py

@@ -1,6 +1,7 @@
 from inspect import getargspec, ismethod
 
 from webob import exc
+import six
 
 from .core import abort, request
 from .decorators import expose
@@ -63,6 +64,9 @@ class RestController(object):
         try:
             result = handler(method, args)
 
+            # filter empty strings from the arg list
+            args = list(six.moves.filter(bool, args))
+
             #
             # If the signature of the handler does not match the number
             # of remaining positional arguments, attempt to handle

pecan/tests/test_rest.py

@@ -289,6 +289,45 @@ class TestRestController(PecanTestCase):
         assert r.status_int == 200
         assert r.body == b_(dumps(dict(items=ThingsController.data)))
 
+    def test_getall_with_lookup(self):
+
+        class LookupController(RestController):
+
+            def __init__(self, _id):
+                self._id = _id
+
+            @expose()
+            def get_all(self):
+                return 'ID: %s' % self._id
+
+        class ThingsController(RestController):
+
+            data = ['zero', 'one', 'two', 'three']
+
+            @expose()
+            def _lookup(self, _id, *remainder):
+                return LookupController(_id), remainder
+
+            @expose('json')
+            def get_all(self):
+                return dict(items=self.data)
+
+        class RootController(object):
+            things = ThingsController()
+
+        # create the app
+        app = TestApp(make_app(RootController()))
+
+        # test get_all
+        for path in ('/things', '/things/'):
+            r = app.get(path)
+            assert r.status_int == 200
+            assert r.body == b_(dumps(dict(items=ThingsController.data)))
+
+        r = app.get('/things/foo')
+        assert r.status_int == 200
+        assert r.body == b_('ID: foo')
+
     def test_simple_nested_rest(self):
 
         class BarController(RestController):