return 404 if none found

isso/comment.py

@@ -18,4 +18,6 @@ def create(app, environ, request, path):
 def get(app, environ, request, path, id=None):
 
     rv = list(app.db.retrieve(path)) if id is None else app.db.get(path, id)
+    if not rv:
+        abort(404)
     return Response(json.dumps(rv), 200, content_type='application/json')

isso/db.py

@@ -71,6 +71,9 @@ class SQLite(Abstract):
         return
 
     def query2comment(self, query):
+        if query is None:
+            return None
+
         return Comment(
             text=query[4], author=query[5], email=query[6], website=query[7],
             parent=query[8], mode=query[9], id=query[0], created=query[2], modified=query[3]

specs/test_comment.py

@@ -57,3 +57,9 @@ class TestComments(unittest.TestCase):
 
         rv = json.loads(r.data)
         assert len(rv) == 20
+
+    def testGetInvalid(self):
+
+        assert self.get('/comment/path/123').status_code == 404
+        assert self.get('/comment/path/spam').status_code == 404
+        assert self.get('/comment/foo/').status_code == 404