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

Change-Id: Ibefa6742d0411b8cb8ae1592c8b1ca077088c5e6

2 files changed, 35 insertions, 3 deletions

diff --git a/pecan/rest.py b/pecan/rest.py
index 4058bd6..881de79 100644
--- a/pecan/rest.py
+++ b/pecan/rest.py
@@ -64,9 +64,6 @@ 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
@@ -92,6 +89,9 @@ class RestController(object):
         return result
 
     def _handle_lookup(self, args):
+        # filter empty strings from the arg list
+        args = list(six.moves.filter(bool, args))
+
         # check for lookup controllers
         lookup = getattr(self, '_lookup', None)
         if args and iscontroller(lookup):
diff --git a/pecan/tests/test_rest.py b/pecan/tests/test_rest.py
index 2f5aefa..ab088f2 100644
--- a/pecan/tests/test_rest.py
+++ b/pecan/tests/test_rest.py
@@ -289,6 +289,38 @@ class TestRestController(PecanTestCase):
         assert r.status_int == 200
         assert r.body == b_(dumps(dict(items=ThingsController.data)))
 
+    def test_404_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):
+
+            @expose()
+            def _lookup(self, _id, *remainder):
+                return LookupController(_id), remainder
+
+        class RootController(object):
+            things = ThingsController()
+
+        # create the app
+        app = TestApp(make_app(RootController()))
+
+        # these should 404
+        for path in ('/things', '/things/'):
+            r = app.get(path, expect_errors=True)
+            assert r.status_int == 404
+
+        r = app.get('/things/foo')
+        assert r.status_int == 200
+        assert r.body == b_('ID: foo')
+
     def test_getall_with_lookup(self):
 
         class LookupController(RestController):