fix migration

wcs/sql.py

@@ -1579,7 +1579,7 @@ def do_global_views(conn, cur):
                 % (name, category.id)
             )
 
-    init_search_tokens_triggers(cur)
+    init_search_tokens(cur)
 
 
 def clean_global_views(conn, cur):
@@ -1703,6 +1703,7 @@ def init_search_tokens(conn=None, cur=None):
     init_search_tokens_data(cur)
 
     # Index at the end, small performance trick... not that useful, but it's free...
+    cur.execute("CREATE EXTENSION IF NOT EXISTS pg_trgm;")
     cur.execute("CREATE INDEX IF NOT EXISTS wcs_search_tokens_trgm ON wcs_search_tokens USING gin(token gin_trgm_ops);")
 
     # And last: functions to use this brand new table