Make saving also save the children in the #sortable element (TODO: name the #sortable element better)

cms/djangoapps/contentstore/views.py

@@ -276,8 +276,13 @@ def save_item(request):
     if not has_access(request.user, item_location):
         raise Http404  # TODO (vshnayder): better error
 
-    data = json.loads(request.POST['data'])
-    modulestore().update_item(item_location, data)
+    if request.POST['data']:
+        data = json.loads(request.POST['data'])
+        modulestore().update_item(item_location, data)
+
+    if request.POST['children']:
+        children = json.loads(request.POST['children'])
+        modulestore().update_children(item_location, children)
 
     # Export the course back to github
     # This uses wildcarding to find the course, which requires handling

cms/djangoapps/github_sync/__init__.py

@@ -86,7 +86,12 @@ def export_to_github(course, commit_message, author_str=None):
     If author_str is specified, uses it in the commit.
     '''
     course_dir = course.metadata.get('data_dir', course.location.course)
-    repo_settings = load_repo_settings(course_dir)
+    try:
+        repo_settings = load_repo_settings(course_dir)
+    except InvalidRepo:
+        log.warning("Invalid repo {0}, not exporting data to xml".format(course_dir))
+        return
+
     git_repo = setup_repo(repo_settings)
 
     fs = OSFS(git_repo.working_dir)

cms/static/coffee/src/models/module.coffee

@@ -2,6 +2,7 @@ class CMS.Models.Module extends Backbone.Model
   url: '/save_item'
   defaults:
     data: ''
+    children: ''
 
   loadModule: (element) ->
     elt = $(element).find('.xmodule_edit').first()
@@ -10,6 +11,9 @@ class CMS.Models.Module extends Backbone.Model
   editUrl: ->
     "/edit_item?#{$.param(id: @get('id'))}"
 
+  updateChildren: (children) ->
+    @set(children: JSON.stringify(children))
+
   save: (args...) ->
     @set(data: JSON.stringify(@module.save())) if @module
     super(args...)

cms/static/coffee/src/views/module_edit.coffee

@@ -13,18 +13,22 @@ class CMS.Views.ModuleEdit extends Backbone.View
 
       # Load preview modules
       XModule.loadModules('display')
+      @$children = @$el.find('#sortable')
       @enableDrag()
 
-  enableDrag: ->
+  enableDrag: =>
       # Enable dragging things in the #sortable div (if there is one)
-      if $("#sortable").length > 0
-        $("#sortable").sortable({
+      if @$children.length > 0
+        @$children.sortable(
           placeholder: "ui-state-highlight"
-          })
-        $("#sortable").disableSelection();
+          update: (event, ui) =>
+            @model.updateChildren(@$children.find('.module-edit').map(
+                (idx, el) -> $(el).data('id')
+            ).toArray())
+        )
+        @$children.disableSelection()
 
-
-  save: (event) ->
+  save: (event) =>
     event.preventDefault()
     @model.save().done((previews) =>
       alert("Your changes have been saved.")