series: Only accept integers in the detailed series URL

We were trying to find a series with a primary key not being an integer
otherwise, resulting in a ValueError and an HTTP error 500.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

patchwork/tests/test_series.py

@@ -116,6 +116,11 @@ def testStringRepresentation(self):
         revision = series.revisions()[0]
         self.assertEquals(str(revision), 'Revision 1')
 
+class SeriesViewTest(GeneratedSeriesTest):
+    def testSeriesIdNotInteger(self):
+        response = self.client.get('/series/foo/')
+        self.assertEqual(response.status_code, 404)
+
 class IntelGfxTest(SeriesTest):
     project = Project(linkname = 'intel-gfx',
                       name = 'Intel Gfx',

patchwork/urls.py

@@ -73,7 +73,7 @@
     # series views
     url(r'^project/(?P<project>[^/]+)/series/$', SeriesListView.as_view(),
      name='series_list'),
-    (r'^series/(?P<series>[^/]+)/$', SeriesView.as_view()),
+    (r'^series/(?P<series>\d+)/$', SeriesView.as_view()),
 
     # patch views
     (r'^patch/(?P<patch_id>\d+)/$', 'patchwork.views.patch.patch'),