I need to be able to show all results of my view initially but then only show 1 result after the user selects their options form the exposed filters.
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For the record, this seems like a really odd thing to want to do! How would you narrow it down to a single result if more than one matches the filter?
Anyway, you should be able to use this hook: https://api.drupal.org/api/views/views.api.php/function/hook_views_query_alter/7
If you check for the existence of filter values, you can then apply a "LIMIT 1" to the query.
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It isn't an odd request when you know the actual use-case. It's a proximity search box that allows user to see which constituency zone they are in on a map. There is only one possible answer. However they still need to see all of the zones on the map before filtering. Apr 30 '14 at 19:37
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okay! That becomes much easier! I assume that your filters would mean they'd only end up with 1 result?– jduApr 30 '14 at 19:48