Metabox 数据未保存

Question

我在 class 中创建了一个 metabox。我需要它用于我拥有的自定义 post 类型。 metabox 显示正常，但值拒绝保存。我已经多次更改代码，但它仍然不适合我。你知道我做错了什么吗？这是完整的代码：

<?php 
class portfolio_metabox {

    public function __construct() {
        if ( is_admin() ) {
            add_action( 'load-post.php', array( $this, 'init_metabox' ) );
            add_action( 'load-post-new.php', array( $this, 'init_metabox' ) );
        }
    }

    public function init_metabox() {
        add_action( 'add_meta_boxes', array( $this, 'add_metabox' ) );
        add_action( 'save_post', array( $this, 'save_metabox' ), 10, 2 );

    }

    public function add_metabox() {
        add_meta_box(
            'details',
            __( 'Project Details', 'chic' ),
            array( $this, 'render_project_metabox' ),
            'portfolio',
            'advanced',
            'default'
        );
    }

    public function render_project_metabox( $post ) {
        // Retrieve an existing value from the database.
        $portfolio_web_design  = get_post_meta( $post->ID, 'portfolio_web_design ', true );
        $portfolio_web_dev  = get_post_meta( $post->ID, 'portfolio_web_dev ', true );
        $portfolio_digital_art  = get_post_meta( $post->ID, 'portfolio_digital_art ', true );
        $portfolio_graphic_design  = get_post_meta( $post->ID, 'portfolio_graphic_design ', true );

        // Set default values.

        // Form fields.
        echo '<table class="form-table">';

        echo '<tr>';
        echo '<th><label for="portfolio_project" class="portfolio_project_label">' . __( 'Project Type', 'chic' ) . '</label></th>';
        echo '<td>';
        echo '<label><input type="checkbox" name="portfolio_web_design " class="portfolio_project_field" value="' . $portfolio_web_design  . '" ' . checked( $portfolio_web_design , 'checked', false ) . '> ' . __( ' Web Design', 'chic' ) . '</label><br>';
        echo '<label><input type="checkbox" name="portfolio_web_dev " class="portfolio_project_field" value="' . $portfolio_web_dev  . '" ' . checked( $portfolio_web_dev , 'checked', false ) . '> ' . __( ' Web Development', 'chic' ) . '</label><br>';
        echo '<label><input type="checkbox" name="portfolio_digital_art " class="portfolio_project_field" value="' . $portfolio_digital_art  . '" ' . checked( $portfolio_digital_art , 'checked', false ) . '> ' . __( ' Digital Art', 'chic' ) . '</label><br>';
        echo '<label><input type="checkbox" name="portfolio_graphic_design " class="portfolio_project_field" value="' . $portfolio_graphic_design  . '" ' . checked( $portfolio_graphic_design , 'checked', false ) . '> ' . __( ' Graphic Design', 'chic' ) . '</label><br>';
        echo '<p class="description">' . __( 'Project Type', 'chic' ) . '</p>';
        echo '</td>';
        echo '</tr>';
        echo '</table>';

    }

    public function save_metabox( $post_id, $post ) {

        // Sanitize user input.
        $portfolio_new_web_design = isset( $_POST[ 'portfolio_web_design' ] ) ? 'checked' : '';
        $portfolio_new_web_dev = isset( $_POST[ 'portfolio_web_dev' ] ) ? 'checked' : '';
        $portfolio_new_digital_art = isset( $_POST[ 'portfolio_digital_art' ] ) ? 'checked' : '';
        $portfolio_new_digital_art = isset( $_POST[ 'portfolio_graphic_design' ] ) ? 'checked' : '';

        // Update the meta field in the database.
        update_post_meta( $post_id, 'portfolio_web_design ', $portfolio_new_web_design  );
        update_post_meta( $post_id, 'portfolio_web_dev ', $portfolio_new_web_dev  );
        update_post_meta( $post_id, 'portfolio_digital_art ', $portfolio_new_digital_art  );
        update_post_meta( $post_id, 'portfolio_graphic_design ', $portfolio_new_digital_art  );

    }

}

new portfolio_metabox;

?>

更新：

Mukesh Panchal 给出的代码运行良好。它保存起来就像我想要的那样，但我仍然无法让元数据显示在模板上。知道为什么会这样吗？

Answer 1

您输入的 name="" 属性中多了一个 space，如下所示：

name="portfolio_web_design "

这应该是：

name="portfolio_web_design"

之后你的 isset 应该可以正常工作了 ;)

Answer 2

你能试试下面更新的代码吗：

<?php
class portfolio_metabox {

    public function __construct() {
        if ( is_admin() ) {
            add_action( 'load-post.php',     array( $this, 'init_metabox' ) );
            add_action( 'load-post-new.php', array( $this, 'init_metabox' ) );
        }
    }
    public function init_metabox() {
        add_action( 'add_meta_boxes',        array( $this, 'add_metabox' )         );
        add_action( 'save_post',             array( $this, 'save_metabox' ), 10, 2 );
    }

    public function add_metabox() {
        add_meta_box(
            'details',
            __( 'Project Details', 'chic' ),
            array( $this, 'render_project_metabox' ),
            'portfolio',
            'advanced',
            'default'
        );
    }

    public function render_project_metabox( $post ) {

        // Retrieve an existing value from the database.
        $portfolio_web_design  = get_post_meta( $post->ID, 'portfolio_web_design ', true );
        $portfolio_web_dev  = get_post_meta( $post->ID, 'portfolio_web_dev ', true );
        $portfolio_digital_art  = get_post_meta( $post->ID, 'portfolio_digital_art ', true );
        $portfolio_graphic_design  = get_post_meta( $post->ID, 'portfolio_graphic_design ', true );

        // Set default values.
        // Form fields.
        echo '<table class="form-table">';
        echo '  <tr>';
        echo '      <th><label for="portfolio_project" class="portfolio_project_label">' . __( 'Project Type', 'chic' ) . '</label></th>';
        echo '      <td>';
        echo '          <label><input type="checkbox" name="portfolio_web_design" class="portfolio_project_field" value="' . $portfolio_web_design  . '" ' . checked( $portfolio_web_design , 'checked', false ) . '> ' . __( ' Web Design', 'chic' ) . '</label><br>';
        echo '          <label><input type="checkbox" name="portfolio_web_dev" class="portfolio_project_field" value="' . $portfolio_web_dev  . '" ' . checked( $portfolio_web_dev , 'checked', false ) . '> ' . __( ' Web Development', 'chic' ) . '</label><br>';
        echo '          <label><input type="checkbox" name="portfolio_digital_art" class="portfolio_project_field" value="' . $portfolio_digital_art  . '" ' . checked( $portfolio_digital_art , 'checked', false ) . '> ' . __( ' Digital Art', 'chic' ) . '</label><br>';
        echo '          <label><input type="checkbox" name="portfolio_graphic_design" class="portfolio_project_field" value="' . $portfolio_graphic_design  . '" ' . checked( $portfolio_graphic_design , 'checked', false ) . '> ' . __( ' Graphic Design', 'chic' ) . '</label><br>';
        echo '          <p class="description">' . __( 'Project Type', 'chic' ) . '</p>';
        echo '      </td>';
        echo '  </tr>';
        echo '</table>';

    }

    public function save_metabox( $post_id, $post ) {

        // Sanitize user input.
        $portfolio_new_web_design = isset( $_POST[ 'portfolio_web_design' ] ) ? 'checked' : '';
        $portfolio_new_web_dev = isset( $_POST[ 'portfolio_web_dev' ] ) ? 'checked' : '';
        $portfolio_new_digital_art = isset( $_POST[ 'portfolio_digital_art' ] ) ? 'checked' : '';
        $portfolio_new_digital_art = isset( $_POST[ 'portfolio_graphic_design' ] ) ? 'checked' : '';

        // Update the meta field in the database.
        update_post_meta( $post_id, 'portfolio_web_design', $portfolio_new_web_design  );
        update_post_meta( $post_id, 'portfolio_web_dev', $portfolio_new_web_dev  );
        update_post_meta( $post_id, 'portfolio_digital_art', $portfolio_new_digital_art  );
        update_post_meta( $post_id, 'portfolio_graphic_design', $portfolio_new_digital_art  );
    }
}
new portfolio_metabox;
?>

Answer 3

应该这样做：

class portfolio_metabox {

    public function __construct() {

        if ( is_admin() ) {
            add_action( 'load-post.php', array( $this, 'init_metabox' ) );
            add_action( 'load-post-new.php', array( $this, 'init_metabox' ) );
        }

    }

    public function init_metabox() {

        add_action( 'add_meta_boxes', array( $this, 'add_metabox' ) );
        add_action( 'save_post', array( $this, 'save_metabox' ), 10, 2 );

    }

    public function add_metabox() {

        add_meta_box(
            'details',
            __( 'Project Details', 'chic' ),
            array( $this, 'render_project_metabox' ),
            'portfolio',
            'advanced',
            'default'
        );

    }

    public function render_project_metabox( $post ) {
        // Retrieve an existing value from the database.
        $post_meta = get_post_meta( $post->ID );

                $portfolio_web_design = ( isset($post_meta['portfolio_web_design'][0]) && $post_meta['portfolio_web_design'][0] != '' ) ? $post_meta['portfolio_web_design'][0] : 0;
                $portfolio_web_dev = ( isset($post_meta['portfolio_web_dev'][0]) && $post_meta['portfolio_web_dev'][0]!= '' ) ? $post_meta['portfolio_web_dev'][0] : 0;
                $portfolio_digital_art = ( isset($post_meta['portfolio_digital_art'][0]) && $post_meta['portfolio_digital_art'][0]!= '' ) ? $post_meta['portfolio_digital_art'][0] : 0;
                $portfolio_graphic_design = ( isset($post_meta['portfolio_graphic_design'][0]) && $post_meta['portfolio_graphic_design'][0]!= '' ) ? $post_meta['portfolio_graphic_design'][0] : 0;
        // Set default values.

        // Form fields.
        ?>
        <table class="form-table">
            <tr>
                <th><label for="portfolio_project" class="portfolio_project_label"><?php esc_html_e( 'Project Type', 'chic' ) ?></label;></th>
                <td>
                    <label><input type="checkbox" name="portfolio_web_design" class="portfolio_project_field" value="1" <?php checked( $portfolio_web_design , 1 ) ?>> <?php esc_html_e( ' Web Design', 'chic' ); ?></label><br>
                    <label><input type="checkbox" name="portfolio_web_dev" class="portfolio_project_field" value="1" <?php checked( $portfolio_web_dev , 1 ) ?>> <?php esc_html_e( ' Web Development', 'chic' ); ?></label><br>
                    <label><input type="checkbox" name="portfolio_digital_art" class="portfolio_project_field" value="1" <?php checked( $portfolio_digital_art , 1 ) ?>> <?php esc_html_e( ' Digital Art', 'chic' ); ?></label><br>
                    <label><input type="checkbox" name="portfolio_graphic_design" class="portfolio_project_field" value="1" <?php checked( $portfolio_graphic_design , 1 ) ?>> <?php esc_html_e( ' Graphic Design', 'chic' ); ?></label><br>
                    <p class="description"><?php esc_html_e( 'Project Type', 'chic' ) ?></p;>
                </td>
            </tr>
        </table>
        <?php
    }

    public function save_metabox( ) {
        global $post;
        // Sanitize user input.
        $portfolio_new_web_design = ( isset( $_POST['portfolio_web_design'] ) && $_POST['portfolio_web_design'] == 1 ) ? 1 : 0;
        $portfolio_new_web_dev = ( isset( $_POST['portfolio_web_dev'] ) && $_POST['portfolio_web_dev'] == 1 ) ? 1 : 0;
        $portfolio_new_digital_art = ( isset( $_POST['portfolio_digital_art'] ) && $_POST['portfolio_digital_art'] == 1 ) ? 1 : 0;
        $portfolio_new_digital_art = ( isset( $_POST['portfolio_graphic_design'] ) && $_POST['portfolio_graphic_design'] == 1 ) ? 1 : 0;

        // Update the meta field in the database.
        update_post_meta( $post->ID, 'portfolio_web_design', $portfolio_new_web_design );
        update_post_meta( $post->ID, 'portfolio_web_dev', $portfolio_new_web_dev );
        update_post_meta( $post->ID, 'portfolio_digital_art', $portfolio_new_digital_art );
        update_post_meta( $post->ID, 'portfolio_graphic_design', $portfolio_new_digital_art );

    }

}

new portfolio_metabox;

我稍微清理了你的代码。尽量不要把 space 放在所有内容之后，这是没有必要的。问题在于您提取 post 元数据的方式。 $portfolio_web_design 等变量为空。

我测试了这个并且它有效。

希望这对您有所帮助:)

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