Merge branch 'mr/develop/tag' into 'master'

add

See merge request !66

data_sync/topic/util.py

@@ -102,7 +102,7 @@ def get_problem_extra(pid, uid, tids, sid, did):
     res['closure_tag_ids'] = []
     if tids:
         tag_sql = """
-            select id, name from api_tag
+            select id, name from api_sub_tag
             where id in ({}) and
             is_online=true""".format(
                 ','.join([str(tid) for tid in tids]))