我将一些自定义字段添加到带有true或false的选择框的类别中。但如果术语meta不存在，则所选函数会给出一个错误：

注意：未定义索引：everyoneCompose in/Applications/MAMP/。。。在线22

我理解为什么，但如何设置默认值以防止此错误？我试图检查metadata\\u是否存在，并添加metadata一词，但这不起作用，请在此处检查我的代码：

    function addSelectdFieldsToCat(){
    $cat_id         = $_GET[\'tag_ID\'];
    if (metadata_exists(\'term\', $cat_id, \'cat_settings\' )) {
        $catSettings    = get_term_meta($cat_id, \'cat_settings\', false);
    } else {
        $defaultdata = array( \'cat_settings\' =>
            array(
                \'everyoneCompose\' => true,
                \'restrictedGroup\' => true
            )
        );
        add_term_meta($cat_id, \'cat_settings\', $defaultdata, false);
    }
    ?>

    <tr class="form-field">
        <th scope="row" valign="top"><label for="cat_page_title"><?php _e(\'Everyone can compose?\'); ?></label></th>
        <td>
            <select name="cat_settings[everyoneCompose]">
                <option value="1" <?php selected( $catSettings[\'everyoneCompose\'], 1 ); ?>>true</option>
                <option value="0" <?php selected( $catSettings[\'everyoneCompose\'], 0 ); ?>>false, alleen admin</option>
            </select>
        </td>
    </tr>

    <tr class="form-field">
        <th scope="row" valign="top"><label for="cat_page_title"><?php _e(\'Restricted category?\'); ?></label></th>
        <td>
            <select name="cat_settings[restrictedGroup]">
                <option value="1" <?php selected( $catSettings[\'restrictedGroup\'], 1 ); ?>>true</option>
                <option value="0" <?php selected( $catSettings[\'restrictedGroup\'], 0 ); ?>>false</option>
            </select>
        </td>
    </tr>

    <?php

}
add_action ( \'edit_category_form_fields\', \'addTitleFieldToCat\');

function saveCategoryFields() {
    if ( isset( $_POST[\'cat_settings\'] ) ) {
        update_term_meta($_POST[\'tag_ID\'], \'cat_settings\', $_POST[\'cat_settings\']);
    }
}
add_action ( \'edited_category\', \'saveCategoryFields\');