使用CustomBookNavigationBlock，报错：Call to a member function getCurrentRequest() on null in Drupald8modulePluginBlockCustomBookNavigationBlock->build()
替换CustomBookNavigationBlock如下：
<?php
namespace Drupal\custom_book_block\Plugin\Block;
use Drupal\book\BookManagerInterface;
use Drupal\book\Plugin\Block\BookNavigationBlock;
// use Drupal\Core\Cache\Cache;
use Drupal\Core\Form\FormStateInterface;
use Drupal\node\NodeInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\HttpFoundation\RequestStack;
use Drupal\Core\Entity\EntityStorageInterface;
/**
* Provides a custom 'Book navigation' block.
*
* @Block(
* id = "custom_book_navigation",
* admin_label = @Translation("Custom book navigation"),
* category = @Translation("Menus")
* )
*/
class CustomBookNavigationBlock extends BookNavigationBlock {
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
return new static(
$configuration,
$plugin_id,
$plugin_definition,
$container->get('current_route_match'),
$container->get('book.manager'),
$container->get('entity_type.manager')->getStorage('node')
);
}
/**
* {@inheritdoc}
*/
public function defaultConfiguration() {
return [
'block_mode' => "all pages",
'target_book' => "",
'max_levels' => "",
'always_expand' => 1,
];
}
/**
* {@inheritdoc}
*/
public function blockForm($form, FormStateInterface $form_state) {
$form = parent::blockForm($form, $form_state);
$options = ['' => "Show all"];
foreach ($this->bookManager->getAllBooks() as $book_id => $book) {
$options[$book_id] = $book['title'];
}
$form['target_book'] = [
'#type' => 'radios',
'#title' => $this->t('Book to display'),
'#options' => $options,
'#default_value' => $this->configuration['target_book'],
'#description' => $this->t("If left empty, all books will be shown."),
];
$form['max_levels'] = [
'#type' => 'number',
'#title' => $this->t('Maximum levels to show'),
'#min' => 0,
'#default_value' => $this->configuration['max_levels'],
'#description' => $this->t("If set to zero, all levels will be shown."),
];
$form['always_expand'] = [
'#type' => 'checkbox',
'#title' => $this->t('Always expand the menu'),
'#default_value' => $this->configuration['always_expand'],
'#description' => $this->t("If unchecked, will only be expanded in context."),
];
return $form;
}
/**
* {@inheritdoc}
*/
public function blockSubmit($form, FormStateInterface $form_state) {
parent::blockSubmit($form, $form_state);
$this->configuration['target_book'] = $form_state->getValue('target_book');
$this->configuration['max_levels'] = $form_state->getValue('max_levels');
$this->configuration['always_expand'] = $form_state->getValue('always_expand');
}
/**
* {@inheritdoc}
*/
public function build() {
$current_bid = 0;
$node = $this->routeMatch->getParameter('node');
if ($node instanceof NodeInterface && !empty($node->book['bid'])) {
$current_bid = $node->book['bid'];
}
$max_levels = $this->configuration['max_levels'] ?: NULL;
$target_book = $this->configuration['target_book'];
$always_expand = $this->configuration['always_expand'];
if ($this->configuration['block_mode'] == 'all pages') {
$book_menus = [];
$pseudo_tree = [0 => ['below' => FALSE]];
$books = $this->bookManager->getAllBooks();
uasort($books, ['Drupal\Component\Utility\SortArray', 'sortByWeightElement']);
foreach ($books as $book_id => $book) {
// If a target book which is not this one, continue.
if ($target_book && $book_id != $target_book) {
continue;
}
// If only displaying the top node, no need to do additional queries.
if ($max_levels == 1) {
$book_node = $this->nodeStorage->load($book_id);
$book['access'] = $book_node->access('view');
$pseudo_tree[0]['link'] = $book;
$book_menus[$book_id] = $this->bookManager->bookTreeOutput($pseudo_tree);
}
else {
// Retrieve the full menu, to the specified depth.
$data = $this->bookManager->bookTreeAllData($book_id, $book, $max_levels, $always_expand);
$book_menus[$book_id] = $this->bookManager->bookTreeOutput($data);
$book_menus[$book_id]['#items'][$book_id]['in_active_trail'] = FALSE;
if ($book_menus[$book_id]['#items'][$book_id]['original_link']['bid'] == $current_bid) {
$book_menus[$book_id]['#items'][$book_id]['in_active_trail'] = TRUE;
}
}
$book_menus[$book_id] += [
'#book_title' => $book['title'],
];
}
if ($book_menus) {
return [
'#theme' => 'book_all_books_block',
] + $book_menus;
}
}
elseif ($current_bid) {
// If not 'all pages' and a target book which is not this one, return.
if ($target_book && $current_bid != $target_book) {
return [];
}
// Only display this block when the user is browsing a book and do
// not show unpublished books.
$nid = \Drupal::entityQuery('node')
->condition('nid', $node->book['bid'], '=')
->condition('status', NodeInterface::PUBLISHED)
->execute();
// Only show the block if the user has view access for the top-level node.
if ($nid) {
$tree = $this->bookManager->bookTreeAllData($node->book['bid'], $node->book, $max_levels, $always_expand);
// There should only be one element at the top level.
$data = array_shift($tree);
$below = $this->bookManager->bookTreeOutput($data['below']);
if (!empty($below)) {
return $below;
}
}
}
return [];
}
/**
* {@inheritdoc}
*/
// public function getCacheContexts() {
// return Cache::mergeContexts(parent::getCacheContexts(), ['route.book_navigation']);
// }
/**
* {@inheritdoc}
*
* @todo Make cacheable in https://www.drupal.org/node/2483181
*/
// public function getCacheMaxAge() {
// return 0;
// }
}
区别参考这个链接： https://www.drupal.org/files/issues/2021-07-01/call-to-a-member-function-3221656-2.patch