/// <summary>
/// Gets the fallback value.
/// </summary>
/// <param name="field">The field.</param>
/// <returns></returns>
public virtual string GetFallbackValue(Field field)
{
Assert.ArgumentNotNull(field, "field");
Item item = field.Item;
Assert.ArgumentNotNull(item, "item");
Logger.Debug(">> GetFallbackValue - s:{0} db:{1} i:{2} f:{3}", Sitecore.Context.GetSiteName(), item.Database.Name, item.ID, field.Name);
Logger.PushIndent();
string value = null;
try
{
// test cache first
value = Cache.GetFallbackValue(item, field);
// we have a cached value.. return it.
if (value != null)
{
Logger.Debug("Value found in the cache");
return(value);
}
// Call the fieldFallback pipeline
var pipelineArgs = new FieldFallbackPipelineArgs(field);
Sitecore.Pipelines.CorePipeline.Run("fieldFallback", pipelineArgs);
// if the args has a value, then one of the processors fell back to something
if (pipelineArgs.HasFallbackValue)
{
Logger.Debug("Fallback Found");
// put it in the cache
Cache.AddFallbackValues(item, field, pipelineArgs.FallbackValue);
return(pipelineArgs.FallbackValue);
}
Logger.Debug("No fallback");
return(null);
}
finally
{
Logger.PopIndent();
Logger.Debug("<< GetFallbackValue");
}
}