Restrict the node local tabs access to specific content types

Question

I have a module_name.links.tasks.yml file for Drupal 8, whose content is the following one.

entity.node.module_admin:
  route_name: module_name.admin
  base_route: entity.node.canonical
  title: Admin Page
  weight: 99

entity.node.check_backend:
  route_name: module_name.check-backend
  base_route: entity.node.canonical
  title: Check Backend
  weight: 100

entity.node.download_webagent:
  route_name: module_name.download_webagent
  base_route: entity.node.canonical
  title: Download Webagent.conf
  weight: 101

entity.node.download_httpdconf:
  route_name: module_name.download_httpdconf
  base_route: entity.node.canonical
  title: Download httpd.conf
  weight: 102

These tabs appear in all the content type nodes. How can I restrict them to specific content types?

Answer 1

Yes, routing is correct. Routes specify access rules, if you want your route to only be accessible for a certain node type, implement custom access callback and check for that.

The local task will then automatically respect that.

Example from core:

comment.reply:
  path: '/comment/reply/{entity_type}/{entity}/{field_name}/{pid}'
  defaults:
    _controller: '\Drupal\comment\Controller\CommentController::getReplyForm'
    _title: 'Add new comment'
    pid: ~
  requirements:
    _custom_access: '\Drupal\comment\Controller\CommentController::replyFormAccess'

That method then can receive the same arguments as the controller/form, in your case the node (just add NodeInterface $node) and you can check the type there and everything else you want (like permissions)

Answer 2

I found the answer !

I have to give like following in module_name.routing.yml which will inherit the entity node tabs which are defined in local.links.task.yml

module_name.admin:
  path: '/node/{node}/module_name'
  defaults:
    _controller: '\Drupal\module_name\Controller\MyController::my_function'
    _title: 'Admin Page'
  requirements:
    _permission: 'access admin tab'
    _custom_access: '\Drupal\module_name\Controller\MyController::admin_tab_access'

and in the controller function i am filtering the node types which are only i wanted to display in tab :

public function admin_tab_access($node) {
        $node_data = node_load($node);
        if(isset($node_data->field_p_type[0]->value)) {
            $node_type = $node_data->field_p_type[0]->value;
            if ($node_type == 'type_1' || $node_type == 'type_2'){
                return AccessResult::allowed();
            } else {
                return AccessResult::forbidden();
            }
        }
      return AccessResult::forbidden();
    }