Views relationships don't work on reference field

What I found so far:

datafield.views.inc

has these lines at the top:

  $field_name = $field_storage->getName();
  $columns = $field_storage->getSetting('columns');
  $field_settings = $field_storage->getSetting('field_settings');

$columns is filled, but $field_settings is empty.

Fixed one bug for now, but don't work yet.

Replaced

$field_settings = $field_storage->getSetting('field_settings');

with

  $field_configs = \Drupal::entityTypeManager()
    ->getStorage('field_config')
    ->loadByProperties([
      'field_name'  => $field_name,
      'entity_type' => $field_storage->getTargetEntityTypeId(),
    ]);
  $field_config = reset($field_configs);
  $field_settings = $field_config ? $field_config->getSetting('field_settings') : [];

Based on the type of bug, it means this feature was not tested yet.

The rest of code AI fixed. I don't know what it did, but it rewrote a lot of code and now it works. I attached the patch for version 2.0.11.

This is what it said:

• Correct variable $target_entity_type_id is used instead of the wrong $field_settings['target_type'].
• Added failsafes so the hook does nothing if no instance exists or if the referenced entity type is missing.

// TODO:
• If you have the same field storage reused by several bundles and the sub-field “entity_reference_type” differs between instances, you might want to iterate over all $field_configs and create one relationship per encountered target entity type.

Updated patch to fix notice:

Notice: Only variables should be passed by reference in datafield_field_views_data() (line 61