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I'm trying to create a custom node search view, that takes Taxonomy terms as a filter (dropdown - autocomplete not an option). The problem I have, is that there could be >1000 terms and I would like to restrict the dropdown to show only the taxonomy terms that are already in use by the nodes returned in the initial view results. Does this make sense?
Can anyone advise if this is possible, and if so, how best to achieve it?
Thanks for the help!