Contrib.social

Support for legacy preprocesses?

Open on Drupal.org →
Created on 8 July 2025, about 2 months ago

Problem/Motivation

Display Builder is avoiding as much as possible to interact with ThemeManager::render():

  • By design, Entity View Display integration is sometimes bypassing node.html.twig, user.html.twig, media.html.twig, field.html.twig...
  • By design, Page Layout integration is sometimes bypassing page.html.twig and region.html.twig
  • By design, Views integration is sometimes bypassing views-view.html.twig, views-view-field.html.twig...

So, preproces and suggestions related to those templates will not be executed.

Proposed resolution

This make Display Builder ready for the future, but this will also break with some contrib & custom developments.

Do we trigger some preprocesses (with invokeAll I guess) to alter the root of the sources data tree? What is happening is a root has many sources?

Let's avoid making ot configurable. We take the decision, and we implement it or not.

📌 Task
Status

Active

Version

1.0

Component

Main / Misc.

Created by

🇫🇷France pdureau Paris

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Comments & Activities

  • Issue created by @pdureau
  • Comment about 2 months ago →
    🇫🇷France Grimreaper France 🇫🇷

    I would say, this will open the door to side effects and be big maintenance burden.

    I would vote for no support. We want to gain performance by no more have all those preprocesses.

  • Comment 12 days ago →
    🇫🇷France pdureau Paris

    hook_preprocess_field may be betetr manager at UI Patterns 2 level, related to the field source plugin

  • Comment 12 days ago →
    🇫🇷France Grimreaper France 🇫🇷

    As of my first comment, I am still in favor of no support.

    But if support will be provided, can we make it an opt-in in the field source config? With a description saying that people should start to avoid using it to prepare for future deprecation.

  • Comment 1 day ago →
    🇫🇷France pdureau Paris

    It may also be the opportunity of supporting the extra fields we are importing from Manage display or Layout Builder.

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