WordPress get_results 按發布日期排序

Question

我第一次在 WordPress 中使用“get_results”，需要按日期對結果進行排序。 到目前為止我所得到的是：

$wpdb->get_results( "SELECT * FROM asi_posts WHERE post_type = 'post' AND post_status = 'publish' AND YEAR(post_date) = '" . $year->year . "'" );

這在檢索帖子時效果很好，盡管它會在列表頂部顯示最舊的帖子，而不是最新的帖子。

我應該在該查詢中使用什么來反轉順序的正確語法是什么？

謝謝。

如果它更有用，這里是完整的代碼：

<?php
                // Get years that have posts
                $years = $wpdb->get_results( "SELECT YEAR(post_date) AS year FROM asi_posts WHERE post_type = 'post' AND post_status = 'publish' GROUP BY year DESC" );

                //  For each year, do the following
                foreach ( $years as $year ) {

                    // Get all posts for the year
                    $posts_this_year = $wpdb->get_results( "SELECT * FROM asi_posts WHERE post_type = 'post' AND post_status = 'publish' AND YEAR(post_date) = '" . $year->year . "'" );

                    // Display the year as a header
                    echo '<div class="year-header-block">';
                    echo '<button class="btn-year-reveal">View</button>';
                    echo '<h3>' . $year->year . ' Industry News &amp; Comment</h3>';
                    echo '</div>';

                    // Start an unorder list
                    echo '<ul class="no-list yearly-archive-list">';

                    // For each post for that year, do the following
                    foreach ( $posts_this_year as $post ) {
                        // Display the title as a hyperlinked list item
                        echo '<li><a href="' . get_permalink($post->ID) . '"><span class="news-title">' . $post->post_title . '</span><span class="news-date">' . get_the_time('F j, Y', $post->ID) . '</span></a></li>';
                    }

                    // End the unordered list
                    echo '</ul>';
                }
            ?>

Answer 1

我們可以通過兩種方式做到這一點。

從你的代碼。

更改以下代碼

// Get all posts for the year
$posts_this_year = $wpdb->get_results( "SELECT * FROM asi_posts WHERE post_type = 'post' AND post_status = 'publish' AND YEAR(post_date) = '" . $year->year . "'" );

到以下代碼。

// Get all posts for the year
$posts_this_year = $wpdb->get_results( "SELECT * FROM asi_posts WHERE 
post_type = 'post' AND post_status = 'publish' AND 
YEAR(post_date) = '" . $year->year . "' ORDER BY post_date DESC" );

其他解決方案：

在主題的 function.php 文件中創建一個新函數posts_by_year 。

function posts_by_year() {
  // array to use for results
  $years = array();

  // get posts from WP
  $posts = get_posts(array(
    'numberposts' => -1,
    'orderby' => 'post_date',
    'order' => 'DESC',
    'post_type' => 'post',
    'post_status' => 'publish'
  ));

  // loop through posts, populating $years arrays
  foreach($posts as $post) {
    $years[date('Y', strtotime($post->post_date))][] = $post;
  }

  // reverse sort by year
  krsort($years);

  return $years;
}

並在您的模板中調用以下代碼。

<?php foreach(posts_by_year() as $year => $posts) : ?>
  <h2><?php echo $year; ?></h2>

  <ul>
    <?php foreach($posts as $post) : setup_postdata($post); ?>
      <li>
        <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
      </li>
    <?php endforeach; ?>
  </ul>
<?php endforeach; ?>

Answer 2

您應該ORDER BY xxx ASC而不是DESC來首先獲取最舊的，如下所示：

$years = $wpdb->get_results( "SELECT YEAR(post_date) AS year FROM asi_posts WHERE post_type = 'post' AND post_status = 'publish' GROUP BY post_date ASC" );

此外，如果您想訂購其他查詢，它應該如下所示：

$wpdb->get_results( "SELECT * FROM asi_posts WHERE post_type = 'post' AND post_status = 'publish' AND YEAR(post_date) = '" . $year->year . "' ORDER BY post_date ASC" );

注意：默認情況下 SQL 總是升序排列，因此您可以刪除指令 ASC。 但是，如果您希望先訂購較舊的，則將 ASC 替換為 DESC。

Answer 3

我想在某些日期之間獲取帖子，例如2009年10月24日至2019年11月1日。要獲取該帖子的查詢應使用什么查詢SQL數據庫。 我需要所有類別的帖子。 謝謝