--- a/candolint/handlers.py	Sat Aug 20 10:10:40 2016 +0800
+++ b/candolint/handlers.py	Sat Aug 20 10:21:05 2016 +0800
@@ -25,6 +25,16 @@
     return get_or_404(pq)
 
 
+def get_check_or_404(project, check_num):
+    cq = (Check
+        .select(Check, Change)
+        .join(Change)
+        .where(Check.project == project))
+    if check_num != 'latest':
+        cq = cq.where(Check.ordinal == check_num)
+    return get_or_404(cq)
+
+
 class BaseHandler(RequestHandler):
     def prepare(self):
         database.connect()
@@ -75,13 +85,7 @@
 class CheckHandler(BaseHandler):
     def get(self, domain, user, name, check_num, format_='html'):
         project = get_project_or_404(domain, user, name)
-        check_query = (Check
-                       .select(Check, Change)
-                       .join(Change)
-                       .where(Check.project == project))
-        if check_num != 'latest':
-            check_query = check_query.where(Check.ordinal == check_num)
-        check = get_or_404(check_query)
+        check = get_check_or_404(project, check_num)
         lines = json_decode(check.lines)
         if format_ == 'raw':
             self.get_raw(project, check, lines)