[generate:entity:content] Missing view_builder handler for custom entity with bundles

[tahirm]

Problem

When creating a custom entity with bundles support, you are not able to access entities through REST api.

How to reproduce

• Drupal version: 8.2.5.
• Console version: 1.0.0-rc14
• Console Launcher version (using drupal-composer project).

Steps to reproduce

• Create a custom content entity Music using generate:entity:content command with bundles support enabled. It will create two entity classes Music and MusicType
• Create a bundle Rock. Add some content for Rock bundle.
• Enable REST resource for Musicin configuration which will be something like /admin/structure/music/{music}.
• Make a GET request with REST api like /admin/structure/music/1.
• You will get error something like {"message":"A fatal error occurred: Route entity.music_type.canonical does not exist."}

Solution

As mentioned in this issue, this is happening because Drupal\Core\Entity\Routing\DefaultHtmlRouteProvider::getCanonicalRoute()requires view_builder to create a canonical url, which is missing from MusicType class.
If you manually add "view_builder" = "Drupal\Core\Entity\EntityViewBuilder" in handlers list of MusicType class, it works fine.