Maxaud

Yes I have. First place I went.

I managed to filter the code by adding some where and join clauses.

New code:

<?php

	global $pf_override;

	class PF_override {

		public $site_terms = array();

		public $sql_join 	= '';
		public $sql_where 	= '';

		function __construct() {

			// add filters
			add_filter( 'init', array( &$this, 'populates_site_terms' ) );
			add_filter( 'pre_get_posts', array( &$this, 'filter_query' ) );
		}

		function populates_site_terms() {

			// my actual function does some processing and
			// checks caches and combines IDs from multiple
			// different sources here and then sets site_terms 

			$this->site_terms = array( 1, 2, 3 );
		}

		function filter_query( $query ) {

			// not the main query?
			if ( !$query->is_main_query() ) {
				return $query;
			}

			// have terms to filter by?
			if ( !empty( $this->site_terms ) ) {

				// construct tax_query
				$tax_query = array(
					'taxonomy' 	=> 'site_category',
					'field' 	=> 'id',
					'terms' 	=> $this->site_terms,
					'operator' 	=> 'IN'
					);

				// this needs to be an array of arrays
				$taxquery = array(
					$tax_query
				);

				// set this..
				$query->set( 'tax_query', $taxquery );

				if ( $query->is_singular ) {

					global $wpdb;

					$q = &$query->query_vars;

					$q['suppress_filters'] = false;

					$query->parse_tax_query( $q );

					$clauses = $query->tax_query->get_sql( $wpdb->posts, 'ID' );

					$this->sql_join 	.= $clauses['join'];
					$this->sql_where 	.= $clauses['where'];
				}
			}

			return $query;
		}

		function filter_join( $join ) {

			if ( !empty( $this->sql_join ) ) {
				$join .= $this->sql_join;
			}

			return $join;
		}

		function filter_where( $where ) {

			if ( !empty( $this->sql_where ) ) {
				$where .= $this->sql_where;
			}

			return $where;
		}
	}

	// not the admin? init class
	if ( !is_admin() ) {
		$pf_override = new PF_override();
	}

    ?>

This part was added:

if ( $query->is_singular ) {

	global $wpdb;

	$q = &$query->query_vars;

	$q['suppress_filters'] = false;

	$query->parse_tax_query( $q );

	$clauses = $query->tax_query->get_sql( $wpdb->posts, 'ID' );

	$this->sql_join 	.= $clauses['join'];
	$this->sql_where 	.= $clauses['where'];
}

Apologies, I should have looked more in depth in to the documentation.

I’d like to suggest making this the default setting if the media picker is also added to the custom field.

I reverted to 1.0.7 and I get my API calls back.