Adding action links to pages in Drupal 8

To add an action link for creating content of a given node type on a related listing view, you could add to 'example' module an example.links.action.yml file with contents like the following:

drupal 8 action links on dynamic routes
links.action.yml appears_on dynamic

To put an action link on an arbitrary node page, you'll need to get the route for that node. You can't do drupal router:debug | grep '/my-alias' nor even drupal router:debug | grep '/node/8' — console is only providing the real routes, not the (literally infinite) paths that can be created by these routes.

If you do:

drupal router:debug | grep '/node/'

You'll note it returns the route:

entity.node.canonical

For:

/node/{node}

You cannot use a yaml file to put an action link on a dynamic path, on a route name only when given a parameter, such as a particular node.

https://www.drupal.org/node/2499819#comment-11791002

https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Menu%21LocalActionManager.php/function/LocalActio...

Resources:

https://www.drupal.org/docs/8/api/routing-system/introductory-drupal-8-routes-and-controllers-example

How do I create a link to add a specific content type
https://www.drupal.org/node/2374343

Create an "add content" link in View Header that is only visible to users with appropriate permissions. [Solved]
https://www.drupal.org/node/2006322

Add link to add content to views lists
https://www.drupal.org/node/2104553

Add action link to view
https://www.drupal.org/node/1313132

See also:

https://thinkshout.com/blog/2016/07/drupal-8-routing-tricks-for-better-admin-urls/

http://www.slideshare.net/kgoel1/routing-in-drupal-8

http://valuebound.com/resources/blog/drupal-8-how-to-create-the-local-tasks-through-custom-module

https://www.drupal.org/docs/8/api/menu-api/providing-module-defined-actions

Local action links now provided by plugins using YAML discovery and implementing LocalActionInterface
https://www.drupal.org/node/2007444

YAML files for menu links, contextual links, local tasks, and local actions have been renamed
https://www.drupal.org/node/2302893

http://www.wembassy.com/content/module-linksactionyml

http://orangeweb.com.au/drupal-8-local-actions

https://gist.github.com/adityaanurag/1ecfe073d972a4320dea73c4c1dd0c76

https://github.com/drupal8book/token_auth/blob/master/token_auth.links.action.yml

http://drupal.stackexchange.com/questions/189305/can-we-add-the-destination-query-parameter-to-a-link-from-yml-c...

https://drupalapi.alphanodes.com/api/drupal/core!core!modules!block_content!block_content.links.action.yml/8

c: 2016 November 21, Monday, 5:27 PM