After migration from wbm 2 content moderation when I click on node edit I am getting ModerationStateFieldItemList::referencedEntities() not found error

same here.

I am also having this issue when creating new content types and blocks that don't need to be moderated. This seems happen because the class Drupal\content_moderation\EntityTypeInfo adds the moderation state field to all entities that can be moderated regardless if selection for moderation for an specific bundle(see function entityBaseFieldInfo). I would gladly work on a patch but I'm not sure what the best solution would be.

An intermediary solution that got my site working again was to delete all the config files for the bundles I don't want moderation on and run drush cim.

Example:

• rm path/to/config/core.base_field_override.ENTITY_TYPE.ENTITY_BUNDLE.moderation_state.yml
• drush cim

Thanks for the findings @jmoreira.

I had to do one more step to ensure it works fine (since we were not using full config import / export). Added the code in drush command itself.

Updated patch to handle exceptions for entity types not supporting base field definitions call.

Great catch, great patch! I want to merge it, but I can't do that until this change is also implemented in the Drush 9 variant of the command. Additionally, this will need tests.

Refactored the patch to work with Drush 9 and Drush 8. It will also delete the base field overrides *before* installing Content Moderation, not afterwards. If anyone can give this a quick manual test, it would be heavily appreciated!

Works great only if all entity types are fieldable. To account for non-fieldable we can pop this at line 161 of MigrationController

$entity_type = $this->entityTypeManager->getDefinition($entity_type_id);
if (!$entity_type->entityClassImplements(FieldableEntityInterface::class)) {
  continue;
}

Committed and pushed. Thanks!