Is it possible to update module provided configuration schema in an hook_update_N()?

Question

So I have a custom module with a module.schema file, defining a configuration schema for that module, not talking about database/field schema.

module.settings:
type: config_object
label: 'Settings for Module'
mapping:
  my_ids:
   type: sequence
   label: 'Ids from config'
   sequence:
    type: string
    label: 'ids'

I provided a module.settings file like:

my_ids:
 - 1
 - 2
 - 3
 - 4

As you can see, my mistake is that I needed a type: int in my schema not type: string.

On the configuration synchronization page I see Drupal has taken care of this and corrected this in its active configuration, by setting string values for "my_ids", and of course producing a diff between the staged and active configuration. The active conf has now strings:

my_ids:
 - "1"
 - "2"
 - "3"
 - "4"

I would like to update the schema of that configuration to int, without re-installing that module.Is this possible.

Tried to write to schema service in an update hook like:

  $name = 'module.schema';
  $path = '/home/user/Drupal/docroot/modules/module/config/schema';
  $source = new FileStorage($path);
  /** @var \Drupal\Core\Config\ExtensionInstallStorage $active_schema */
  $active_schema = \Drupal::service('config.storage.schema');
  $active_schema->write($name, $source->read($name));

But it turns out that "Write operation is not allowed." and that does not sound like a surprise.. :)

So is there another solution for this schema update, except re-installing the module?

Thank you.

Answer 1

Well it turns out I spent some time here because I tried to update the schema file, by typing int not integer LOL. All I needed was integer and clear caches after all :)

Answer 2

I think everything you need is here: https://www.drupal.org/docs/8/api/update-api/updating-configuration-in-drupal-8

The second example should be your case