案例1:rest\\u prepare\\u post\\u type在第一种情况下，您将使用rest_prepare_post_type 筛选以获取数据，生成所需的数据，将其添加到数据数组并返回筛选后的数据。在这种情况下，如果立柱类型为“立柱”，则挂钩为rest\\U prepare\\U post。

/**
 * @summary    Filters post rest response
 *
 * @description    Filters post rest response removing or adding certain information
 * @param     object    $data       The response object.
 * @param     object    $post       The original post type object.
 * @param     object    $request    Request used to generate the response.
 * @return    object    $data       The filtered response object.
 */
function wpse_283452_rest_prepare_post($data, $post, $request) {
    $_data = $data->data;
    // say you want to remove author from the response
    unset($_data[\'author\']);
    // if you want to ADD fields, you would do the logic here and...
    // add it to the $_data array
    $data->data = $_data;
    // and finally return it
    return $data;
}
add_filter(\'rest_prepare_post\', \'wpse_283452_rest_prepare_post\', 10, 3);

如果要对分类法使用相同的方法，可以使用rest_prepare_taxonomy/ (reference)

案例2：register\\u rest\\u字段（推荐）

/**
 * Registers a new field on an existing WordPress object type.
 *
 * @since 4.7.0
 *
 * @global array $wp_rest_additional_fields Holds registered fields, organized
 *                                          by object type.
 *
 * @param string|array $object_type Object(s) the field is being registered
 *                                  to, "post"|"term"|"comment" etc.
 * @param string $attribute         The attribute name.
 * @param array  $args {
 *     Optional. An array of arguments used to handle the registered field.
 *
 *     @type string|array|null $get_callback    Optional. The callback function used to retrieve the field
 *                                              value. Default is \'null\', the field will not be returned in
 *                                              the response.
 *     @type string|array|null $update_callback Optional. The callback function used to set and update the
 *                                              field value. Default is \'null\', the value cannot be set or
 *                                              updated.
 *     @type string|array|null $schema          Optional. The callback function used to create the schema for
 *                                              this field. Default is \'null\', no schema entry will be returned.
 * }
 */
register_rest_field(
    \'post\',
    \'wpse_283452_taxonomies\',
    array(
        \'get_callback\' => function ($object, $field_name, $request) {
            return wpse_283452_taxonomies_callback($object);
        },
    )
);

/**
 * @summary    Return and array with taxonomy info
 *
 * @description    Returns an array with taxonomy information in a custom way
 * @param     object    $object            The rest item original object
 * @return    array     $custom_taxonom    an array with taxonomy terms with their information in a custom way
 */
function wpse_283452_taxonomies_callback($object) {
    $post_id = $object[\'id\'];
    $terms = wp_get_post_terms(
        $post_id,
        \'business_type\',
        array(
            \'fields\' => \'all\',
        )
    );
    // here you should construct an array with the information in $terms in the way/structure you want
    return $terms;
}

就是这样。

如果有效，请告诉我。