name = 'bidirectional-post-relation'; $this->label = __( 'Bidirectional Post Relation', 'acf' ); $this->category = 'relational'; $this->defaults = array( 'post_type' => array(), 'taxonomy' => array(), 'max' => 0, 'filters' => array('search', 'post_type', 'taxonomy'), 'elements' => array(), 'return_format' => 'object' ); $this->l10n = array( 'max' => __("Maximum values reached ( {max} values )",'acf'), 'loading' => __('Loading','acf'), 'empty' => __('No matches found','acf'), 'tmpl_li' => '

<%= text %>

' ); // do not delete! acf_field::__construct(); // extra add_action('wp_ajax_acf/fields/relationship/query', array($this, 'ajax_query')); add_action('wp_ajax_nopriv_acf/fields/relationship/query', array($this, 'ajax_query')); } function clean_post_value( $value ) { // validate if( empty($value) ) { return $value; } // force value to array $value = acf_force_type_array( $value ); // array foreach( $value as $k => $v ){ // object? if( is_object($v) && isset($v->ID) ) { $value[ $k ] = $v->ID; } } // save value as strings, so we can clearly search for them in SQL LIKE statements $value = array_map('strval', $value); // return return $value; } /* * update_value() * * This filter is applied to the $value before it is updated in the db * * @type filter * @since 3.6 * @date 23/01/13 * * @param $value - the value which will be saved in the database * @param $post_id - the $post_id of which the value will be saved * @param $field - the field array holding all the field options * * @return $value - the modified value */ function update_value( $value, $post_id, $field ) { if ( $post_id === $GLOBALS['post_id'] ) { $new_value = $this->clean_post_value( $value ); $old_value = $this->clean_post_value( get_field( $field['key'] ) ); $new_values = array(); $missing_values = array(); if ( ( ! empty( $new_value ) ) && ( ! empty( $old_value ) ) ) { $new_values = array_diff( $new_value, $old_value ); $missing_values = array_diff( $old_value, $new_value ); } else { if ( ! empty( $new_value ) ) { $new_values = array_map( 'strval', $new_value ); } if ( ! empty( $old_value ) ) { $missing_values = array_map( 'strval', $old_value ); } } foreach( $new_values as $value_add ) { $existing_value = get_field( $field['key'], $value_add ); if ( ! empty( $existing_value ) ) { $existing_value[] = $post_id; } else { $existing_value = array( $post_id ); } update_field( $field['key'], $existing_value, $value_add ); } foreach( $missing_values as $value_remove ) { $existing_value = get_field( $field['key'], $value_remove ); if ( ! empty( $existing_value ) ) { $existing_value = array_diff( $existing_value, array( $post_id ) ); update_field( $field['key'], $existing_value, $value_remove ); } } } // validate if( empty($value) ) { return $value; } // force value to array $value = acf_force_type_array( $value ); // array foreach( $value as $k => $v ){ // object? if( is_object($v) && isset($v->ID) ) { $value[ $k ] = $v->ID; } } // save value as strings, so we can clearly search for them in SQL LIKE statements $value = array_map('strval', $value); // return return $value; } } // create field new acf_field_prbd(); ?>