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I want to have tabs, but since they need to be dynamic I am making use of local tasks. In the class extending DeriverBase I have written the following function:

public function getDerivativeDefinitions($base_plugin_definition) {
    $this->derivatives = array();
    foreach ($this->moduleFormatManager->getDefinitions() as $key => $definition) {
      $this->derivatives[$key]['title'] = $definition['title'];
      $this->derivatives[$key]['route_parameters'] = array('module_format' => $key);
      $this->derivatives[$key]['route_name'] = 'module.format_configure_' . $key;
      if($key == 'xyz') {
        $key = 'newkey';
      $this->derivatives[$key]['title'] = 'newkey';
      $this->derivatives[$key]['route_name'] = 'module.newkey';
      $this->derivatives[$key]['parent_id'] = "module.format_configure:xyz";
      }
    }
    foreach ($this->derivatives as &$entry) {
      $entry += $base_plugin_definition;
    }
    return $this->derivatives;
  }

In the above code, a tab for each key is being generated: my problem is in the if condition. In the if condition I am trying to generate a sub tab for a particular type of tab by declaring parent_id. But the code doesn't work for me.

What changes should I introduce in order to make it work? I used this link to learn about local tasks.

My module.links.tasks.yml file looks like this:

module.format_configure:
  title: 'Configuration'
  base_route: module.configure
  tab_root_id: module.configure
  deriver: 'path to deriver'

All the mentioned routes have been declared in *.routing.yml file.

  • Have a look at how Field UI is doing it. – user21641 Jul 3 '15 at 9:27
  • @IvanJaros I have already looked in that module but couldn't find my mistake hence asking here. – user2750995 Jul 3 '15 at 10:46
  • Have you properly set the class and deriver in your module's links.task.yml file? – user21641 Jul 3 '15 at 13:30
  • @IvanJaros I have updated my answer with the expected code in my links.tasks.yml file. – user2750995 Jul 3 '15 at 14:07
  • How is the behaviour happening in the UI directl/ – Daniel Wehner Jul 4 '15 at 21:36
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You said your file is called module.links.tasks.yml. The correct filename is module.links.task.yml (note links word is pluralized, but task is not).

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