TypeError: array_map(): Argument #2 ($array) must be of type array, null given in array_map()

Patch attached!

I'm trying to understand how this is possible. The 2nd parameter of array_map call is $entity_types, which contains enabled_entity_types property of rabbit_hole.settings config.

There is a default value for this property defined in config/install/rabbit_hole.settings.yml. So how did you manage to install the module without applying the default configuration?

Can you check please?

I got the same error while upgrading to D10.1.1. Fortunately, the error is fixed by running a database update. Therefore, the patch is not useful.

Agreed. I removed the patch and my site's working just fine. Most likely just user error on my part. We can close this issue.

Thanks for the confirmation! Closing it

I got this error after upgrading from 9.4 to 10.1.
I did run all db updates and ended up with an empty setting en/admin/config/content/rabbit-hole and the variable was always null.
The patch did not solve this but I was able to solve this by overriding the variable with an empty array than I did the config saved removed the workaround and my site works again.

I got this error after upgrading from Drupal 9 to 10. After applying Patch https://www.drupal.org/project/rabbit_hole/issues/3375025#comment-15152836 🐛 TypeError: array_map(): Argument #2 ($array) must be of type array, null given in array_map() Closed: cannot reproduce its resolved this error

I got this error also, fresh 10.2.3.

The problem is: The code suppose the $entity_types is array. It is not if you have not setup the module, its NULL.

Then the array_map tries to use it as an array.

 $entity_types = \Drupal::config('rabbit_hole.settings')->get('enabled_entity_types') ?? [];
  $affected_bundle_types = array_map(function($entity_type_id) use ($entity_type_manager) {
    return $entity_type_manager->getStorage($entity_type_id)->getEntityType()->getBundleEntityType();
  }, $entity_types);

Quick solution is: $entity_types = \Drupal::config('rabbit_hole.settings')->get('enabled_entity_types') ?? [];

Same error exists in the src/BehaviorSettingsManager. But there it has been handled similar way alreay in the line 41.

Patch to fix these issues is attached.

The problem is: The code suppose the $entity_types is array. It is not if you have not setup the module, its NULL

I wonder how the module hook implementation is being called if the module is not installed?

@Matroskeen

I mean: The rabbit_hole already installed but not configured - the config is empty, the rabbit hole settings form was not submitted - or there was no entity type checked.

I do not know why sb want this situation, enable the rb, but does not configure it properly, but on my (inherited) site this is the status.

Whatever: if this config should used in array environment, then it should be an array.

The empty value default set to array case was already there (I mentioned it before) I just added the default array value to all similar code.

Just want to confirm that #2 3375025-2.patch fixed the issue for us.