Remove unnecessary caching of get_tag_info.

go/vumitools/routing.py

@@ -381,7 +381,7 @@ def get_config(self, msg):
         if msg_mdh.has_user_account():
             user_account_key = msg_mdh.get_account_key()
         elif msg_mdh.tag is not None:
-            tag_info = yield msg_mdh.get_tag_info()
+            tag_info = yield self.vumi_api.mdb.get_tag_info(msg_mdh.tag)
             user_account_key = tag_info.metadata['user_account']
             if user_account_key is None:
                 raise UnownedTagError(

go/vumitools/tests/test_utils.py

@@ -264,10 +264,8 @@ def test_clear_object_cache(self):
         md.set_tag(["pool", "tag"])
         self.assertEqual(md._store_objects, {})
         md_conv = yield md.get_conversation()
-        tag_info = yield md.get_tag_info()
         self.assertEqual(md._store_objects, {
             'conversation': md_conv,
-            'tag_info': tag_info,
         })
         md.clear_object_cache()
         self.assertEqual(md._store_objects, {})
@@ -459,40 +457,11 @@ def test_rewrap(self):
         self.assertEqual({}, other_md._store_objects)
         self.assertEqual(md._go_metadata, other_md._go_metadata)
 
-    def test_get_tag_info_no_tag(self):
-        md = self.mk_md()
-        self.assertEqual(None, md.tag)
-        self.assertRaises(ValueError, md.get_tag_info)
-
     def test_get_tagpool_metadata_no_tag(self):
         md = self.mk_md()
         self.assertEqual(None, md.tag)
         self.assertRaises(ValueError, md.get_tagpool_metadata)
 
-    @inlineCallbacks
-    def test_get_tag_info(self):
-        md = self.mk_md()
-        md.set_tag(["pool", "tagname"])
-
-        tag_info = yield md.get_tag_info()
-        self.assertEqual(("pool", "tagname"), tag_info.tag)
-
-    @inlineCallbacks
-    def test_tag_info_caching(self):
-        md = self.mk_md()
-        md.set_tag(["pool", "tagname"])
-
-        self.assertEqual({}, md._store_objects)
-        tag_info = yield md.get_tag_info()
-        self.assertEqual(("pool", "tagname"), tag_info.tag)
-        self.assertEqual({'tag_info': tag_info}, md._store_objects)
-
-        # Stash a fake thing in the cache to make sure that what we get is
-        # actually the thing in the cache.
-        md._store_objects['tag_info'] = "I am the cached tag_info"
-        cached_tag_info = yield md.get_tag_info()
-        self.assertEqual(cached_tag_info, "I am the cached tag_info")
-
     @inlineCallbacks
     def test_get_tagpool_metadata(self):
         yield self.vumi_helper.setup_tagpool("pool", ["tagname"], metadata={

go/vumitools/utils.py

@@ -188,13 +188,6 @@ def set_tag(self, tag):
         TaggingMiddleware.add_tag_to_msg(self.message, tag)
         self.tag = TaggingMiddleware.map_msg_to_tag(self.message)
 
-    def get_tag_info(self):
-        if self.tag is None:
-            raise ValueError("No tag to look up metadata for.")
-
-        return self._get_if_not_stashed(
-            'tag_info', self.vumi_api.mdb.get_tag_info, tuple(self.tag))
-
     def get_tagpool_metadata(self):
         if self.tag is None:
             raise ValueError("No tag to look up metadata for.")