GravityView Make (some) Search Fields Required

gravityview-required-search-fields.php

<?php

/** 
 * If you need to make some of the GravityView search fields required before search is submited
 *  - add as many lines as you need to define which fields are required
 *    e.g. -> 	jQuery('#gv_search_XYZZ').prop('required', true );
 * 
 * Add this gist to your theme functions.php
 * 
 */

add_action('gravityview_after', 'my_theme_make_search_fields_required' );

function my_theme_make_search_fields_required() {
	?>
	<script>
		//define here the search fields that are required
		jQuery('#gv_search_2247').prop('required', true );

		// validation magic 
		jQuery('form.gv-widget-search').submit( function(e) {
			e.stopPropagation();
			var isValid = true;
			jQuery('.gv-widget-search input:required').each( function(){
				if( jQuery(this).val() === '' ) {
					isValid = false;
				}
			});
			return isValid;
		});
	</script>
	<?php
}