Updating a multi-valued field in ApacheSolr

I've been using ExternalFileField for external scoring so far, so that the external field gets "updated" and not "deleted and added"

Now, I have a field which is multivalued. I c开发者_StackOverflow中文版annot use ExternalFileField as I need this field in the suggest component too.

Is there something other than ExternalFileField which will help me in doing this?

Thanks!