onComponentSave (SaveEventArgs)

Question

I'm setting up some basic functions for a Tridion 2013 SP1 EventSystem. The idea is simple, set the date on the metadata of a component when the metadata field is left empty. Now it seems that the event system thinks it's a new component and returns the following error.

An exception of type 'Tridion.ContentManager.ItemDoesNotExistException' occurred in Tridion.ContentManager.dll but was not handled in user code Additional information: The item tcm:3-4437-16-v0 does not exist.

The component uri of the component updating is: tcm:3-4437-16 so for some reason the eventsystem thinks it's a new component (-v0).

so here is my code:

EventSubscription

EventSystem.Subscribe<Component, SaveEventArgs>(ContentEvents.OnComponentSave, EventPhases.TransactionCommitted);

The Class Function

public static void OnComponentSave(Component component, SaveEventArgs args, EventPhases phase)
    {
        Log.Info(component, "OnComponentSave " + component.MetadataSchema.Title);

        if (component.Metadata!=null)
        {
            var metadata = new ItemFields(component.Metadata, component.MetadataSchema);
            var standardMeta = metadata.GetEmbeddedField("embed_standard_meta");

            Log.Info(component, "OnComponentSave There is a metadata schema ");

            if (standardMeta != null)
            {
                Log.Info(component, "OnComponentSave There is metadata");

                if (standardMeta.GetDateValue("date_creation") == null || ((DateField)standardMeta["date_creation"]).Value == DateTime.MinValue)
                {
                    ((DateField)standardMeta["date_creation"]).Value = DateTime.Now;
                    component.Metadata = metadata.ToXml();
                    Log.Info(component, "OnComponentSave " + DateTime.Now);
                }
            }
        }
    }

Hope any one can point me in the right direction, it's kinda frustrating.

Answer 1

The only obvious problem is that you should subscribe to EventPhases.Initiated instead of EventPhases.TransactionCommitted. Other than that it looks fine, unless you are calling component.Save somewhere down the line.

Answer 2

You are calling the event in transaction committed phase. But editable version of the component is not available during this phase. Subscribe to the event during Initiated phase.