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I have a view and in the header of the view, I am rendering a custom block. The block is showing up just fine, however, I need to alter it and I cannot seem to figure this out. I have tried hook_preprocess_block, hook_block_view_alter and a couple others. I know the ID of my block but it isn't helping.

If I am embedding the block in the view and I want to alter the block, do I need to first alter the view and tell it to rerender the block? I am using drupal 8. Any help would be appreciated.

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I assume you're displaying a block_content entity.

That is not actually rendered through the block system, it's an entity, so you need to implement hook_block_content_view() (see hook_ENTITY_TYPE_view() for documentation)

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  • Yes and specifically Global: Rendered entity - Custom block (Global: Rendered entity - Custom block). I added function avanir_block_content_view(...){ kint($build); } to my theme file and nothing is outputting on the screen. I also figured out the twig name and changing the twig template didn't actually change what was rendered in the view (which I think is what you meant in your answer). – Ronnie Sep 22 '16 at 19:33
  • I meant to say no kint messages are outputting on my screen – Ronnie Sep 22 '16 at 19:40
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    that's because you need a module to implement a hook, not a theme. themes can only implement a few specific alter hooks. And custom blocks have no template on their own, so there's no preprocess either. – Berdir Sep 22 '16 at 21:45
  • ah, well that is a huge diff between 7 and 8 that I am just figuring out. Thank you – Ronnie Sep 22 '16 at 23:14
  • This really helped and I got it working. Thank you very much. – Ronnie Sep 23 '16 at 0:07

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