Add ability to update modulestore metadata for a module separately from data or children

cms/djangoapps/contentstore/management/commands/import.py

@@ -26,3 +26,4 @@ class Command(BaseCommand):
                 keystore().update_item(module.location, module.definition['data'])
             if 'children' in module.definition:
                 keystore().update_children(module.location, module.definition['children'])
+            keystore().update_metadata(module.url, module.metadata)

common/lib/keystore/__init__.py

@@ -171,9 +171,19 @@ class ModuleStore(object):
     def update_children(self, location, children):
         """
         Set the children for the item specified by the location to
-        data
+        children
 
         location: Something that can be passed to Location
         children: A list of child item identifiers
         """
         raise NotImplementedError
+
+    def update_metadata(self, location, metadata):
+        """
+        Set the metadata for the item specified by the location to
+        metadata
+
+        location: Something that can be passed to Location
+        metadata: A nested dictionary of module metadata
+        """
+        raise NotImplementedError

common/lib/keystore/mongo.py

@@ -85,7 +85,7 @@ class MongoModuleStore(ModuleStore):
     def update_children(self, location, children):
         """
         Set the children for the item specified by the location to
-        data
+        children
 
         location: Something that can be passed to Location
         children: A list of child item identifiers
@@ -97,3 +97,19 @@ class MongoModuleStore(ModuleStore):
             {'location': Location(location).dict()},
             {'$set': {'definition.children': children}}
         )
+
+    def update_metadata(self, location, metadata):
+        """
+        Set the children for the item specified by the location to
+        metadata
+
+        location: Something that can be passed to Location
+        metadata: A nested dictionary of module metadata
+        """
+
+        # See http://www.mongodb.org/display/DOCS/Updating for
+        # atomic update syntax
+        self.collection.update(
+            {'location': Location(location).dict()},
+            {'$set': {'metadata': metadata}}
+        )

common/lib/keystore/xml.py

@@ -94,3 +94,13 @@ class XMLModuleStore(ModuleStore):
         children: A list of child item identifiers
         """
         raise NotImplementedError("XMLModuleStores are read-only")
+
+    def update_metadata(self, location, metadata):
+        """
+        Set the metadata for the item specified by the location to
+        metadata
+
+        location: Something that can be passed to Location
+        metadata: A nested dictionary of module metadata
+        """
+        raise NotImplementedError("XMLModuleStores are read-only")