[FIX] action-type button from a list row being edited in an o2m

Issue 575065

Flow for a button[@type=action] requires going through multiple RPC
calls to execute action. Due to reloading behavior of o2m-list on
actions (saves containing form then executes action then reloads row),
internal form view gets removed while e.g. server action is being
fetched (in Views#do_execute_action).

Problem: there is guard on ``rpc`` call which drops response to
stopped widget (Widget#rpc) => action/load call never returns
successfully because linked form is dead.

Solution: instead of calling View#do_execute_action via the formview,
call it via the listview (do_execute_action was already partially
overridden to change the ``on_close`` callback, override it further).

=> widget still lives, and rpc requests execute correctly leading to
all actions being correctly called (mostly).

bzr revid: xmo@openerp.com-20120629105325-vmwpyi7w3pc33sg9

addons/web/static/src/js/view_form.js

@@ -2752,12 +2752,16 @@ openerp.web.form.One2ManyList = openerp.web.ListView.List.extend({
                     self.cancel_pending_edition();
                 });
 
-            // Overload execute_action on the edition form to perform a simple
-            // reload_record after the action is done, rather than fully
-            // reload the parent view (or something)
-            var _execute_action = self.edition_form.do_execute_action;
+            // Replace form's do_execute_action by a call to listview's:
+            // because the form view is actually destroyed at one point, the
+            // RPC request to load&execute the action may get dropped on the
+            // floor in some cases (core.js:1173) leading to the flow not
+            // terminating for complex cases (a button of type action, which
+            // needs 2 or 3 RPC roundtrip to execute the action fully).
+            // => because do_execute_action really is on View, use the
+            // listview's
             self.edition_form.do_execute_action = function (action, dataset, record_id, _callback) {
-                return _execute_action.call(this, action, dataset, record_id, function () {
+                return self.view.do_execute_action(action, dataset, record_id, function () {
                     self.view.reload_record(
                         self.view.records.get(record_id));
                 });

addons/web/static/src/js/views.js

@@ -1166,7 +1166,11 @@ session.web.View = session.web.Widget.extend(/** @lends session.web.View# */{
             args.push(context);
             return dataset.call_button(action_data.name, args, handler);
         } else if (action_data.type=="action") {
-            return this.rpc('/web/action/load', { action_id: parseInt(action_data.name, 10), context: context, do_not_eval: true}, handler);
+            return this.rpc('/web/action/load', {
+                action_id: parseInt(action_data.name, 10),
+                context: context,
+                do_not_eval: true
+            }).then(handler);
         } else  {
             return dataset.exec_workflow(record_id, action_data.name, handler);
         }