function wpv_before_display_post_post_relationship($post, $view_id)
{
    static $related = array();
    global $WP_Views;
    if (function_exists('wpcf_pr_get_belongs')) {
        if (!isset($related[$post->post_type])) {
            $related[$post->post_type] = wpcf_pr_get_belongs($post->post_type);
        }
        if (is_array($related[$post->post_type])) {
            foreach ($related[$post->post_type] as $post_type => $data) {
                $related_id = wpcf_pr_post_get_belongs($post->ID, $post_type);
                if ($related_id) {
                    $WP_Views->set_variable($post_type . '_id', $related_id);
                }
            }
        }
    }
}

 /**
  * Generates checksums for defined content types.
  * 
  * @param type $type
  * @param type $item_id
  * @return type
  */
 function generate_checksum($type, $item_id = null)
 {
     switch ($type) {
         case 'group':
             $checksum = wpcf_admin_fields_get_group($item_id);
             $checksum['meta'] = $this->get_group_meta($item_id);
             ksort($checksum['meta']);
             break;
         case 'field':
             $checksum = wpcf_admin_fields_get_field($item_id);
             break;
         case 'custom_post_type':
             $checksum = wpcf_get_custom_post_type_settings($item_id);
             $checksum['relationship_settings']['has'] = wpcf_pr_get_has($item_id);
             if (is_array($checksum['relationship_settings']['has'])) {
                 ksort($checksum['relationship_settings']['has']);
             }
             $checksum['relationship_settings']['belongs'] = wpcf_pr_get_belongs($item_id);
             if (is_array($checksum['relationship_settings']['belongs'])) {
                 ksort($checksum['relationship_settings']['belongs']);
             }
             break;
         case 'custom_taxonomy':
             $checksum = wpcf_get_custom_taxonomy_settings($item_id);
             break;
         default:
             /*
              * Enable $this->generate_checksum('test');
              */
             $checksum = $type;
             break;
     }
     // Unset various not wanted data
     foreach ($this->_remove_data_keys as $key) {
         if (isset($checksum[$key])) {
             unset($checksum[$key]);
         }
     }
     if (is_array($checksum)) {
         ksort($checksum);
     }
     //        debug( $checksum, false );
     return md5(maybe_serialize($checksum));
 }

 function record_post_relationship_belongs($content)
 {
     global $post;
     $this->post_relationship_depth = $this->post_relationship_depth + 1;
     if (!empty($post->ID) && function_exists('wpcf_pr_get_belongs')) {
         if (!isset($this->relations[$post->post_type])) {
             $this->relations[$post->post_type] = wpcf_pr_get_belongs($post->post_type);
         }
         if (is_array($this->relations[$post->post_type])) {
             foreach ($this->relations[$post->post_type] as $post_type => $data) {
                 $related_id = wpcf_pr_post_get_belongs($post->ID, $post_type);
                 if ($related_id) {
                     $this->post_relationship['$' . $post_type . '_id'] = $related_id;
                 } else {
                     $this->post_relationship['$' . $post_type . '_id'] = 0;
                 }
             }
         }
     }
     $this->post_relationship_track[$this->post_relationship_depth] = $this->post_relationship;
     return $content;
 }

function wpv_shortcode_wpv_control_item( $atts, $value ) {
	global $sitepress;
	// First control checks
	if ( !function_exists( 'wpcf_pr_get_belongs' ) ) {
		return __( 'You need the Types plugin to render this parametric search control', 'wpv-views' );
	}
	if ( !isset( $atts['url_param'] ) || empty( $atts['url_param'] ) ) {
		return __('The url_param argument is missing from the wpv-control-set shortcode.', 'wpv-views');
	}
	if ( !isset( $atts['type'] ) || empty( $atts['type'] ) ) {
		return __('The type argument needs to be set in the wpv-control-item shortcode.', 'wpv-views');
	}
	if ( !isset( $atts['ancestor_type'] ) || empty( $atts['ancestor_type'] ) ) {
		return __('The ancestor_type argument is missing from the wpv-control-item shortcode.', 'wpv-views');
	}
	if ( !isset( $atts['ancestor_tree'] ) || empty( $atts['ancestor_tree'] ) ) {
		return __('The ancestors argument is missing from the wpv-control-set shortcode.', 'wpv-views');
	}
	if ( !isset( $atts['returned_pt_parents'] ) || empty( $atts['returned_pt_parents'] ) ) {
		return __('The post types listed in this View do not have ancestors.', 'wpv-views');
	}
	extract(
		shortcode_atts( array(
				'type' => '', // select, multi-select, checbox, checkboxes, radio/radios, date/datepicker, textfield
				'url_param' => '', // URL parameter to be used
				'ancestor_type' => '',
				'ancestor_tree' => '',
				'default_label' => '',
				'returned_pt' => '',
				'returned_pt_parents' => '',
				'format' => false,
				'orderby' => 'title', // can be any key of $allowed_orderby_values
				'order' => 'ASC', // ASC or DESC
                'style' => '', // inline styles for input
                'class' => '', // input classes
                'label_style' => '', // inline styles for input label
                'label_class' => '' // classes for input label
			), $atts)
	);
    
    $style = esc_attr( $style );
    $class = esc_attr( $class );
    $label_style = esc_attr( $label_style );
    $label_class = esc_attr( $label_class );   
    
	$ancestor_tree_array = explode( '>', $ancestor_tree ); // NOTE this makes it useful for just one-branch scenarios, might extend this
	if ( !in_array( $ancestor_type, $ancestor_tree_array ) ) {
		return __( 'The ancestor_type argument refers to a post type that is not included in the ancestors tree.', 'wpv-views' );
	}
	global $wpdb, $WP_Views;
	$return = '';
	$this_type_parent_classes = array();
	$returned_post_types = explode( ',', $returned_pt );
	$returned_post_type_parents = explode( ',', $returned_pt_parents );
	
	$filter_full_list = false;
	
	$this_tree_ground = end( $ancestor_tree_array );
	$this_tree_roof = reset( $ancestor_tree_array );
	if ( !in_array( $this_tree_ground, $returned_post_type_parents ) ) {
		return __( 'The ancestors argument does not end with a valid parent for the returned post types on this View.', 'wpv-views' );
	}
	
	if ( !empty( $default_label ) ) {
		$aux_array = $WP_Views->view_used_ids;
		$view_name = get_post_field( 'post_name', end($aux_array));
		$default_label = wpv_translate( $ancestor_type . '_default_label', $default_label, false, 'View ' . $view_name );
	}

	// Validate order and orderby arguments for SQL query (ignore invalid values).

	// Allowed values and their translation into names of wp_posts columns.
	$allowed_orderby_values = array(
			'id' => 'ID',
			'title' => 'post_title',
			'date' => 'post_date',
			'date_modified' => 'post_modified',
			'comment_count' => 'comment_count' );
	if( ! isset( $allowed_orderby_values[ $orderby ] ) ) {
		$orderby = 'title';
	}
	// Now $orderby contains a valid column name at all times.
	$orderby = $allowed_orderby_values[ $orderby ];
	// Default to ASC on invalid $order value.
	$order = ( 'DESC' == strtoupper( $order ) ) ? 'DESC' : 'ASC';
	
	$view_settings = $WP_Views->get_view_settings();
	$dependant = false;
	$counters = false;
	$empty_action = array();
	if ( isset( $view_settings['dps'] ) && is_array( $view_settings['dps'] ) && isset( $view_settings['dps']['enable_dependency'] ) && $view_settings['dps']['enable_dependency'] == 'enable' ) {
		$dependant = true;
		$force_disable_dependant = $WP_Views->get_force_disable_dependant_parametric_search();
		if ( $force_disable_dependant ) {
			$dependant = false;
		}
	}
	if ( $format && strpos( $format, '%%COUNT%%' ) !== false ) {
		$counters = true;
	}
//.........这里部分代码省略.........

function WPV_wpcf_record_post_relationship_belongs($content)
{
    global $post, $WPV_wpcf_post_relationship, $WPV_wpcf_post_relationship_depth, $WPV_wpcf_post_relationship_track;
    static $related = array();
    $WPV_wpcf_post_relationship_depth++;
    if (!empty($post->ID) && function_exists('wpcf_pr_get_belongs')) {
        if (!isset($related[$post->post_type])) {
            $related[$post->post_type] = wpcf_pr_get_belongs($post->post_type);
        }
        if (is_array($related[$post->post_type])) {
            foreach ($related[$post->post_type] as $post_type => $data) {
                $related_id = wpcf_pr_post_get_belongs($post->ID, $post_type);
                if ($related_id) {
                    $WPV_wpcf_post_relationship['$' . $post_type . '_id'] = $related_id;
                } else {
                    $WPV_wpcf_post_relationship['$' . $post_type . '_id'] = 0;
                }
            }
        }
    }
    $WPV_wpcf_post_relationship_track[$WPV_wpcf_post_relationship_depth] = $WPV_wpcf_post_relationship;
    return $content;
}

function WPV_wpcf_record_post_relationship_belongs($content)
{
    global $post, $WPV_wpcf_post_relationship;
    static $related = array();
    if (function_exists('wpcf_pr_get_belongs')) {
        if (!isset($related[$post->post_type])) {
            $related[$post->post_type] = wpcf_pr_get_belongs($post->post_type);
        }
        if (is_array($related[$post->post_type])) {
            foreach ($related[$post->post_type] as $post_type => $data) {
                $related_id = wpcf_pr_post_get_belongs($post->ID, $post_type);
                if ($related_id) {
                    $WPV_wpcf_post_relationship['$' . $post_type . '_id'] = $related_id;
                }
            }
        }
    }
    return $content;
}

 function add_view_template_parent_groups($items)
 {
     global $post;
     // get current View ID
     $view_template_id = $post->ID;
     // get all view templates attached in the Settings page for single view
     $view_template_relations = $this->get_view_template_settings();
     // find view template groups and get their parents
     $current_types = array();
     $parent_types = array();
     foreach ($view_template_relations as $relation => $value) {
         if ($value == $view_template_id) {
             $current_types[] = $relation;
             if (function_exists('wpcf_pr_get_belongs')) {
                 $parent_types[] = wpcf_pr_get_belongs($relation);
             }
         }
     }
     // get parent groups
     $all_parent_groups = array();
     foreach ($parent_types as $type) {
         foreach ($type as $typename => $typeval) {
             $parent_groups = wpcf_admin_get_groups_by_post_type($typename);
         }
     }
 }

//.........这里部分代码省略.........
    $view_settings_defaults = array('post_type' => 'any', 'orderby' => 'post-date', 'order' => 'DESC', 'paged' => '1', 'posts_per_page' => -1);
    extract($view_settings_defaults);
    $view_settings['view_id'] = $id;
    extract($view_settings, EXTR_OVERWRITE);
    $query = array('posts_per_page' => $posts_per_page, 'paged' => $paged, 'post_type' => $post_type, 'order' => $order, 'suppress_filters' => false, 'ignore_sticky_posts' => true);
    // Add special check for media (attachments) as their default status in not usually published
    if (sizeof($post_type) == 1 && $post_type[0] == 'attachment') {
        $query['post_status'] = 'any';
        // Note this can be overriden by adding a status filter.
    }
    $query = apply_filters('wpv_filter_query', $query, $view_settings, $id);
    // Now we have the $query as in the original one
    // We now need to overwrite the limit, offset, paged and pagination options
    // Also, we set it to just return the IDs
    $query['posts_per_page'] = -1;
    $query['ĺimit'] = -1;
    $query['paged'] = 1;
    $query['offset'] = 0;
    $query['fields'] = 'ids';
    if ($cache_exclude_queried_posts) {
        // do not query again already queried and cached posts
        $already = array();
        if (isset($post_query->posts) && !empty($post_query->posts)) {
            foreach ((array) $post_query->posts as $post_object) {
                $already[] = $post_object->ID;
            }
        }
        $WP_Views->returned_ids_for_parametric_search = $already;
        if (isset($query['pr_filter_post__in'])) {
            $query['post__in'] = $query['pr_filter_post__in'];
        } else {
            // If just for the missing ones, generate the post__not_in argument
            if (isset($query['post__not_in'])) {
                $query['post__not_in'] = array_merge((array) $query['post__not_in'], (array) $already);
            } else {
                $query['post__not_in'] = (array) $already;
            }
            // And adjust on the post__in argument
            if (isset($query['post__in'])) {
                $query['post__in'] = array_diff((array) $query['post__in'], (array) $query['post__not_in']);
                //unset( $query['post__in'] );
            }
        }
    }
    // Perform the query
    $aux_cache_query = new WP_Query($query);
    // In case we need to recreate our own cache object, we do not need to load there all the postmeta and taxonomy data, just for the elements involved in parametric search controls
    $filter_c_mode = isset($view_settings['filter_controls_mode']) && is_array($view_settings['filter_controls_mode']) ? $view_settings['filter_controls_mode'] : array();
    $filter_c_name = isset($view_settings['filter_controls_field_name']) && is_array($view_settings['filter_controls_field_name']) ? $view_settings['filter_controls_field_name'] : array();
    $f_taxes = array();
    $f_fields = array();
    foreach ($filter_c_mode as $f_index => $f_mode) {
        if (isset($filter_c_name[$f_index])) {
            switch ($f_mode) {
                case 'slug':
                    $f_taxes[] = $filter_c_name[$f_index];
                    break;
                case 'cf':
                    $f_fields[] = $filter_c_name[$f_index];
                    break;
                case 'rel':
                    if (function_exists('wpcf_pr_get_belongs')) {
                        $returned_post_types = $view_settings['post_type'];
                        $returned_post_type_parents = array();
                        if (empty($returned_post_types)) {
                            $returned_post_types = array('any');
                        }
                        foreach ($returned_post_types as $returned_post_type_slug) {
                            $parent_parents_array = wpcf_pr_get_belongs($returned_post_type_slug);
                            if ($parent_parents_array != false && is_array($parent_parents_array)) {
                                $returned_post_type_parents = array_merge($returned_post_type_parents, array_values(array_keys($parent_parents_array)));
                            }
                        }
                        foreach ($returned_post_type_parents as $parent_to_cache) {
                            $f_fields[] = '_wpcf_belongs_' . $parent_to_cache . '_id';
                        }
                    }
                    break;
                default:
                    break;
            }
        }
    }
    // If we are using the native caching, update the cache for the posts returned by the aux query
    if (is_array($aux_cache_query->posts) && !empty($aux_cache_query->posts)) {
        $WP_Views->returned_ids_for_parametric_search = array_merge($WP_Views->returned_ids_for_parametric_search, $aux_cache_query->posts);
        $WP_Views->returned_ids_for_parametric_search = array_unique($WP_Views->returned_ids_for_parametric_search);
        if ($cache_use_native) {
            // If we are using the native caching, update the cache for the posts returned by the aux query
            update_postmeta_cache($aux_cache_query->posts);
            update_object_term_cache($aux_cache_query->posts, $view_settings['post_type']);
        } else {
            // Else, we need to fake an $wp_object_cache->cache
            $f_data = array('cf' => $f_fields, 'tax' => $f_taxes);
            $cache_combined = wpv_custom_cache_metadata($aux_cache_query->posts, $f_data);
            $wp_object_cache->cache = $cache_combined;
        }
    }
    return $post_query;
}

function wpv_ajax_wpv_get_post_relationship_info()
{
    if (wp_verify_nonce($_POST['wpv_nonce'], 'wpv_get_posts_select_nonce')) {
        if (function_exists('wpcf_pr_get_belongs') && isset($_POST['post_types'])) {
            $post_types = get_post_types('', 'objects');
            $output_done = false;
            foreach ($_POST['post_types'] as $post_type) {
                $related = wpcf_pr_get_belongs($post_type);
                if ($related === false) {
                    echo sprintf(__('Post type <strong>%s</strong> doesn\'t belong to any other post type', 'wpv-views'), $post_types[$post_type]->labels->singular_name, $related);
                    echo '<br />';
                    $output_done = true;
                }
                if (is_array($related) && count($related)) {
                    $keys = array_keys($related);
                    $related = array();
                    foreach ($keys as $key) {
                        $related[] = $post_types[$key]->labels->singular_name;
                    }
                }
                if (is_array($related) && count($related) == 1) {
                    $related = implode(', ', $related);
                    echo sprintf(__('Post type <strong>%s</strong> is a child of <strong>%s</strong> post type', 'wpv-views'), $post_types[$post_type]->labels->singular_name, $related);
                    echo '<br />';
                    $output_done = true;
                }
                if (is_array($related) && count($related) > 1) {
                    $last = array_pop($related);
                    $related = implode(', ', $related);
                    $related .= __(' and ') . $last;
                    echo sprintf(__('Post type <strong>%s</strong> is a child of <strong>%s</strong> post types', 'wpv-views'), $post_types[$post_type]->labels->singular_name, $related);
                    echo '<br />';
                    $output_done = true;
                }
            }
            if ($output_done) {
                echo '<br />';
            }
        }
    }
    die;
}