I have an index in dire need of some cleaning due to lack of free space.

I want to index only objects of a specific type with correct value on a property.

I have built an extension method for GenericMedia to filter if it is of a certain type:

public static bool IsBlue(this T content)
		{
			var iContent = content as IContent;

			if (iContent != null)
			{
				//fancy logic
				return boolean;
			}

			return false;
		}

Initializing:

SearchClient.Instance.Conventions.ForInstancesOf().IncludeField(x => x.IsBlue());

This property is used when filtering the search.

Since only a fraction of the indexed Generic Media objects actually have true value on on the property IsBlue, I see no reason to index those who do not.

How do I index only these blue objects?

I was thinking of something along these lines:

ContentIndexer.Instance.Conventions.ForInstancesOf().ShouldIndex(x => false);
			ContentIndexer.Instance.Conventions.ForInstancesOf().Where(x => x.IsBlue()).ShouldIndex(x => true);

But, the syntax is all wrong. So, do any you know how to solve this problem?

Thanks for helping.