Merge pull request #505 from edx/dhm/xblock_save

More xblock.save() calls to handle fields set during inits

common/lib/xmodule/xmodule/modulestore/mongo/base.py

@@ -225,6 +225,8 @@ class CachingDescriptorSystem(MakoDescriptorSystem):
                     non_draft_loc = location.replace(revision=None)
                     metadata_to_inherit = self.cached_metadata.get(non_draft_loc.url(), {})
                     inherit_metadata(module, metadata_to_inherit)
+                # decache any computed pending field settings
+                module.save()
                 return module
             except:
                 log.warning("Failed to load descriptor", exc_info=True)
@@ -630,6 +632,8 @@ class MongoModuleStore(ModuleStoreBase):
                 definition_data = {}
         dbmodel = self._create_new_model_data(location.category, location, definition_data, metadata)
         xmodule = xblock_class(system, dbmodel)
+        # decache any pending field settings from init
+        xmodule.save()
         return xmodule
 
     def save_xmodule(self, xmodule):

common/lib/xmodule/xmodule/modulestore/split_mongo/caching_descriptor_system.py

@@ -116,4 +116,6 @@ class CachingDescriptorSystem(MakoDescriptorSystem):
         module.previous_version = json_data.get('previous_version')
         module.update_version = json_data.get('update_version')
         module.definition_locator = self.modulestore.definition_locator(definition)
+        # decache any pending field settings
+        module.save()
         return module

common/lib/xmodule/xmodule/x_module.py

@@ -537,11 +537,14 @@ class XModuleDescriptor(XModuleFields, HTMLSnippet, ResourceTemplates, XBlock):
 
         system: Module system
         """
-        return self.module_class(
+        # save any field changes
+        module = self.module_class(
             system,
             self,
             system.xblock_model_data(self),
         )
+        module.save()
+        return module
 
     def has_dynamic_children(self):
         """
@@ -613,7 +616,13 @@ class XModuleDescriptor(XModuleFields, HTMLSnippet, ResourceTemplates, XBlock):
 
         new_block = system.xblock_from_json(cls, usage_id, json_data)
         if parent_xblock is not None:
-            parent_xblock.children.append(new_block)
+            children = parent_xblock.children
+            children.append(new_block)
+            # trigger setter method by using top level field access
+            parent_xblock.children = children
+            # decache pending children field settings (Note, truly persisting at this point would break b/c
+            # persistence assumes children is a list of ids not actual xblocks)
+            parent_xblock.save()
         return new_block
 
     @classmethod