[DX] [D8] Add a `validate()` method to entity classes

In Drupal 8, classes that are used in order to implement a content entity (which extend the ContentEntityBase class) have a validate() method that validates the values entered when creating the entity.

A similar method should be introduced in Backdrop and added to EntityInterface.

GitHub Link:

https://github.com/backdrop/backdrop-issues/issues/6061

GitHub Issue #:

6061

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Recent comments

You should also mention the design flaw. Even if the bug is fixed, its kind of useless.

Posted 2 hours 15 min ago by (aubergine) on:

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Ah, got it. You are right, this is a bug. I just opened a bug report: https://github.com/backdrop/backdrop-issues/issues/7238 Hopefully, this will be addressed soon. Thanks for...

Posted 1 day 12 hours ago by Alejandro Cremaschi (argiepiano) on:

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I think, you are misunderstanding what i said. 1.admin/structure/file-types/settings = field/uploaded (or anything else) 2.admin/content/files (Manage Files), (the +Add files) link,...

Posted 1 day 13 hours ago by (aubergine) on:

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