ACF 5 Custom Location Rule using Taxonomy Name and Slug

acf-filter-by-taxonomy-slug.php

<?php
//-http://www.advancedcustomfields.com/resources/custom-location-rules/

//- Create new rule type in the Location rules section
add_filter( 'acf/location/rule_types', 'acf_location_rules_types' );

function acf_location_rules_types( $choices ){
    $choices['Post']['taxonomy_slug'] = 'Fee Type';
    return $choices;
}

//- Populate the values for the new rule type
add_filter( 'acf/location/rule_values/taxonomy_slug', 'acf_location_rules_values_taxonomy_slug' );

function acf_location_rules_values_taxonomy_slug( $choices ){
  $fee_types = get_terms( 'fees', array( 'hide_empty'=>false ) );
  if( $fee_types ){
    foreach ( $fee_types as $type ) {
        $choices[$type->slug] = $type->name;
    }
  }
    return $choices;
}

//- Apply the rule filters when displaying a product edit screen
add_filter( 'acf/location/rule_match/taxonomy_slug', 'acf_location_rules_match_taxonomy_slug', 10, 3 );

function acf_location_rules_match_taxonomy_slug( $match, $rule, $options ){

    //- validate
    if( !$options['post_id'] ){
	return false;
    }

    //- post type
    if( !$options['post_type'] ) {
	$options['post_type'] = get_post_type( $options['post_id'] );
    }

    //- vars
    $taxonomies = get_object_taxonomies( $options['post_type'] );
    $terms = $options['post_taxonomy'];

    //- not AJAX -- we're loading the post initially
    if( ! $options['ajax'] ) {
        //- no terms? Load them from the post_id
        if( empty( $terms ) ) {
	    if( is_array( $taxonomies ) ) {
		foreach( $taxonomies as $tax ) {
		    $all_terms = get_the_terms( $options['post_id'], $tax );
		    if( $all_terms ) {
			foreach( $all_terms as $all_term ) {
				$terms[] = $all_term->term_id;
			}
		    }
		}
	    }
        }

        //- no terms at all? 
        if( empty( $terms ) ){
	    //- If no terms, this is a new post and should be treated as if it has the "Uncategorized" (1) category ticked
	    if( is_array( $taxonomies ) && in_array( 'category', $taxonomies ) ) {
		    $terms[] = '1';
	    }
        }
    }//-end of non-ajax rules application

    //- each product should only have one fee category but ACF returns an array with the first value empty
    //- Ex: array( 0 => , 1 => 8 );
    $match_term = array_pop( $terms );
    $term = get_term_by( 'id', $match_term, 'fees' );

    if( $rule['operator'] == "==" ) {
	$match = false;

	if( $term ){
	    if( $rule['value'] == $term->slug ){
		$match = true; 
	    }
	}
    }
    elseif( $rule['operator'] == "!=" ) {
	    $match = true;

	    if( $term ) {
		if( $rule['value'] != $term->slug ) {
		    $match = true; 
		}
	    }
    }

    return $match;

}