我在一个类中创建了一个元数据箱。我需要它用于我拥有的自定义帖子类型。元数据显示正常，但值拒绝保存。我已经多次修改了代码，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：
class MyClass {
public:
MyClass() {}
// note const specifier indicates method guarantees
// no changes to class instance and noexcept specifier
// tells compiler that this method is no-throw guaranteed
int get_x() const noexcept { return x; }
void set_x(int _x) { x = _x; }
private:
int x;
};
更新：
Mukesh Panchal给出的代码效果很好。它就像我想要的那样保存，但我仍然无法获取要在模板上显示的元数据。任何想法为什么会这样？
答案 0 :(得分：1)
输入名称=“”属性中有一个额外的空格，例如：
name="portfolio_web_design "
这应该是：
name="portfolio_web_design"
之后你的isset应该正常工作;）
答案 1 :(得分：0)
您可以尝试下面更新的代码：
<?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;
?>
答案 2 :(得分：0)
这应该这样做：
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', $portfolio_new_digital_art );
}
}
new portfolio_metabox;
我清理了一下你的代码。尽量不要在一切之后放置空间，这是没有必要的。问题在于你将post meta拉出来的方式。像$portfolio_web_design这样的变量是空的。
我对此进行了测试，但确实有效。
希望这会有所帮助：）