WordPress 嵌套自定義帖子類型與永久鏈接

問題描述

我正在嘗試建立一個 multi-level 自定義後置類型結構，其固定鏈接看起來像 authors/books/chapters，作者，書籍和章節都設置為自己的自定義帖子類型。例如，此網站上的典型網址可能如 example.com/authors/stephen-king/the-shining/chapter-3/

每章只能屬於一本書，每本書只能屬於一位作者。我考慮使用分類法而不是 CPT 作為作者和書籍，但是我需要將元數據與每個項目相關聯，我更喜歡這個帖子界面。

我最喜歡的方式是簡單地將每個自定義帖子設置為 CPT 一個級別的條目的孩子。例如，我創建「第 3 章」，並使用自定義 meta-box 將”The Shining” 分配為父級。 “The Shining” 依次將”Stephen King” 作為母公司。創造這些關係我沒有任何麻煩。

我在 CPT s’m 中使用重寫標籤，並且固定鏈接想要工作，但是它們並不完全正確。使用 re-write 分析器，我可以看到重寫規則實際上是生成的，但是它們似乎沒有正確的順序，因此先處理其他規則。

以下是我註冊了 CPT 的方式：

function cpt_init() {

  $labels = array(
    'name' => 'Authors'
   );

  $args = array(
    'labels' => $labels,
    'public' => true,
    'publicly_queryable' => true,
    'show_ui' => true, 
    'show_in_menu' => true, 
    'query_var' => true,
    'rewrite' => array(
        'slug' => 'author',
        'with_front' => FALSE,
    ),
    'with_front' => false,
    'capability_type' => 'post',
    'has_archive' => false, 
    'hierarchical' => true,
    'menu_position' => null,
    'supports' => array( 'title', 'editor' )
  ); 

  register_post_type('authors',$args);

  $labels = array(
    'name' => 'Books'
  );

  $args = array(
    'labels' => $labels,
    'public' => true,
    'publicly_queryable' => true,
    'show_ui' => true, 
    'show_in_menu' => true, 
    'query_var' => true,
    'rewrite' => array(
        'slug' => 'author/%authors%',
        'with_front' => FALSE,
    ),
    'with_front' => false,
    'capability_type' => 'post',
    'has_archive' => false, 
    'hierarchical' => true,
    'menu_position' => null,
    'supports' => array( 'title', 'editor' )
  ); 

  register_post_type('books',$args);


  $labels = array(
    'name' => 'Chapters'
   );

  $args = array(
    'labels' => $labels,
    'public' => true,
    'publicly_queryable' => true,
    'show_ui' => true, 
    'show_in_menu' => true, 
    'query_var' => true,
    'rewrite' => array(
        'slug' => 'author/%authors%/%books%',
        'with_front' => FALSE,
    ),
    'with_front' => FALSE,
    'capability_type' => 'post',
    'has_archive' => false, 
    'hierarchical' => true,
    'menu_position' => null,
    'supports' => array( 'title', 'editor' )
  ); 

  register_post_type('chapters',$args);

}

add_action( 'init', 'cpt_init' );

那麼有什麼辦法可以改變我的重寫規則的優先級，以便作者，書籍和章節都首先匹配？

我也知道我將要添加一個 post_type_link 過濾器，但這似乎是次要的獲得固定鏈接在第一位。如果有人知道在哪裏可以找到關於該過濾器如何工作的全面概述，那將不勝感激。

最佳解決方案

如果你想保持’ 作者’ 為固定鏈接的基礎，例如 example.com/authors/stephen-king/為’ 作者’CPT，example.com/authors/stephen-king/the-shining/為’ 書’CPT 和例子.com /authors /stephen-king /the-shining /chapter-3 /對於「章節」CPT，WordPress 會認為幾乎所有的都是「作者」帖子或「作者」帖子的等級小孩，因為不是這樣 WordPress 最終變得非常困惑。

就這樣説，有一個相當基本的解決方法，但是隻要你的永久鏈接結構總是遵循相同的順序，即’authors’ 這個詞總是跟着一個作者的 s，，後面是一個書呆子，它總是跟着一個一章 s lug，那麼你應該很好去。

在此解決方案中，無需在’chapters’ 和’books’ 的自定義後期類型定義中定義重寫段，但將’authors’ 重寫塊作為簡單的’authors’ 設置，將以下代碼放在您的 functions.php 文件和”flush” 中您的重寫規則。

add_action( 'init', 'my_website_add_rewrite_tag' );
function my_website_add_rewrite_tag() {
    // defines the rewrite structure for 'chapters', needs to go first because the structure is longer
    // says that if the URL matches this rule, then it should display the 'chapters' post whose post name matches the last slug set
    add_rewrite_rule( '^authors/([^/]*)/([^/]*)/([^/]*)/?','index.php?chapters=$matches[3]','top' );
    // defines the rewrite structure for 'books'
    // says that if the URL matches this rule, then it should display the 'books' post whose post name matches the last slug set
    add_rewrite_rule( '^authors/([^/]*)/([^/]*)/?','index.php?books=$matches[2]','top' );   
}

// this filter runs whenever WordPress requests a post permalink, i.e. get_permalink(), etc.
// we will return our custom permalink for 'books' and 'chapters'. 'authors' is already good to go since we defined its rewrite slug in the CPT definition.
add_filter( 'post_type_link', 'my_website_filter_post_type_link', 1, 4 );
function my_website_filter_post_type_link( $post_link, $post, $leavename, $sample ) {
    switch( $post->post_type ) {

        case 'books':

            // I spoke with Dalton and he is using the CPT-onomies plugin to relate his custom post types so for this example, we are retrieving CPT-onomy information. this code can obviously be tweaked with whatever it takes to retrieve the desired information.
            // we need to find the author the book belongs to. using array_shift() makes sure only one author is allowed
            if ( $author = array_shift( wp_get_object_terms( $post->ID, 'authors' ) ) ) {
                if ( isset( $author->slug ) ) {
                    // create the new permalink
                    $post_link = home_url( user_trailingslashit( 'authors/' . $author->slug . '/' . $post->post_name ) );
                }
            }

            break;

        case 'chapters':

            // I spoke with Dalton and he is using the CPT-onomies plugin to relate his custom post types so for this example, we are retrieving CPT-onomy information. this code can obviously be tweaked with whatever it takes to retrieve the desired information.
            // we need to find the book it belongs to. using array_shift() makes sure only one book is allowed
            if ( $book = array_shift( wp_get_object_terms( $post->ID, 'books' ) ) ) {

                // now to find the author the book belongs to. using array_shift() makes sure only one author is allowed
                $author = array_shift( wp_get_object_terms( $book->term_id, 'authors' ) );

                if ( isset( $book->slug ) && $author && isset( $author->slug ) ) {
                    // create the new permalink
                    $post_link = home_url( user_trailingslashit( 'authors/' . $author->slug . '/' . $book->slug . '/' . $post->post_name ) );
                }

            }

            break;

    }
    return $post_link;
}

Learn more about the CPT-onomies plugin