Don't base copy/rename API URLs on the "from" multi path.

Since "copy" and "rename" are operations rather than resources
underneath the multi, let's put them in the root of the API namespace.

r2/r2/config/routing.py

@@ -321,8 +321,8 @@ def make_map():
     mc('/api/:action', controller='api')
 
     mc("/api/multi/mine", controller="multiapi", action="my_multis")
-    mc("/api/multi/*multipath/copy", controller="multiapi", action="multi_copy")
-    mc("/api/multi/*multipath/rename", controller="multiapi", action="multi_rename")
+    mc("/api/multi/copy", controller="multiapi", action="multi_copy")
+    mc("/api/multi/rename", controller="multiapi", action="multi_rename")
     mc("/api/multi/*multipath/r/:srname", controller="multiapi", action="multi_subreddit")
     mc("/api/multi/*multipath/description", controller="multiapi", action="multi_description")
     mc("/api/multi/*multipath", controller="multiapi", action="multi")

r2/r2/controllers/multi.py

@@ -222,7 +222,7 @@ class MultiApiController(RedditController, OAuth2ResourceController):
     @validate(
         VUser(),
         VModhash(),
-        from_multi=VMultiByPath("multipath", require_view=True),
+        from_multi=VMultiByPath("from", require_view=True),
         to_path_info=VMultiPath("to",
             docs={"to": "destination multireddit url path"},
         ),
@@ -256,7 +256,7 @@ class MultiApiController(RedditController, OAuth2ResourceController):
     @validate(
         VUser(),
         VModhash(),
-        from_multi=VMultiByPath("multipath", require_edit=True),
+        from_multi=VMultiByPath("from", require_edit=True),
         to_path_info=VMultiPath("to",
             docs={"to": "destination multireddit url path"},
         ),

r2/r2/public/static/js/multi.js

@@ -147,8 +147,9 @@ r.multi.MultiReddit = Backbone.Model.extend({
         var deferred = new $.Deferred
         Backbone.ajax({
             type: 'POST',
-            url: this.url() + '/' + op,
+            url: '/api/multi/' + op,
             data: {
+                from: this.get('path'),
                 to: newCollection.pathByName(newName)
             },
             success: _.bind(function(resp) {