Disallow removing a language when there is content in that language

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new MR available - continuing the patches efforts

- Create helper method languageUsedByContent($langcode) for ConfigurableLanguage entity class
Used the code from patch ... but "stop searching" on the first "usage"
- Use this method to "block" Language deletion if there is a content for the the language
- Use this method to disable the LanguageDeleteForm if there is a content for the the language
- Fix the tests - by updating the content language (user) before deletion of "default english language"
- Complete the tests - core/modules/language/tests/src/Functional/LanguageConfigurationTest.php
To tests what happens if the content still has language in use.

Questions:
Are there other tests needed?
Is "change record" required for this?

Change record I think so.

Question bunch of tests had to be updated with

    foreach (User::loadMultiple() as $account) {
      $account->set('langcode', LanguageInterface::LANGCODE_NOT_SPECIFIED)->save();
    }

Is that because it broke? Could this cause a regression for existing sites if so.

Question bunch of tests had to be updated with

    foreach (User::loadMultiple() as $account) {
      $account->set('langcode', LanguageInterface::LANGCODE_NOT_SPECIFIED)->save();
    }

Is that because it broke? Could this cause a regression for existing sites if so.

This is about, actually, what happens ... we could delete the language ... but then we'll have issues with the content - in the language - left behind.
No regression here - we just make sure the solution works properly - please @see LanguageConfigurationTest
https://git.drupalcode.org/project/drupal/-/blob/ca516d9b7e1275bce90d1bd....
We cover what happens without those deletions ...

About change record ... this more like functional update (fix) - not API update ... not sure what to specify there ...
any suggestion/example

Think it could be as simple as just mentioning that you can't delete a language now. Maybe a screenshot of the error

Unfortunately i can't get error ... maybe it's not there anymore ...

So, please, anyone could replicate the error from summary ... or confirm the error is ... no more.

however i noticed something like there will be dirty content ... and if want to clean up ... first will delete FIRST actually the content in the new language.
then i could delete the "source"

i'll try to upload some images that should explain the "dirty content"

i'll put on "Needs review" ... just to get some feedback

then we'll see about the change record

Following the steps from the issue summary I get the error.

Applying the MR And trying to repeat the steps I get

Started the CR https://www.drupal.org/node/3367094 →

Sorry I didn't notice before but the proposed solution is TBD, that will have to be updated before being RTBC.

updated the summary ... i hope we're close ...

Lets get this in committers eyes

Good job!

I would normally agree with preventing deletion of things that leaves the site in an inconsistent state but am less sure here.

If I have one node, where the original language is English and French, and I want to remove French from my site entirely, then I get this message - how do I go about removing the French translation from the node, not only from the most recent version, but also every previous revision?

@catch would imagine you would need to do some bulk deletion for the language you are trying to delete. See as like nodes or paragraphs. You can't delete the bundles until the content is gone.

@catch do you mean like point the user to content that needs to be deleted?

if this is the case:
What if there are like thousands of content entities ... and not only node, from users to custom content entities?

Or do you mean, like a "button" that does this?
Here i would say it could a follow-up

So please, details a little "your desires".

For now put back to RTBC ... as there is no clear request of what's needed to be worked on ... imho

@vasike I mean that as far as I know, there's no way to remove old translation content.

For example:

1. Install Umami
2. Edit the spanish translation of node/9 a couple of times, your node_revision__field_summary table should look something like this:

MariaDB [db]> SELECT * FROM node_revision__field_summary WHERE entity_id = 9;
+--------+---------+-----------+-------------+----------+-------+--------------------------------------------------------------------------------------------------------------+----------------------+
| bundle | deleted | entity_id | revision_id | langcode | delta | field_summary_value                                                                                          | field_summary_format |
+--------+---------+-----------+-------------+----------+-------+--------------------------------------------------------------------------------------------------------------+----------------------+
| recipe |       0 |         9 |          17 | en       |     0 | A rich and fiery chili sauce. Take care when handling chili peppers. And serve sparingly!                    | basic_html           |
| recipe |       0 |         9 |          18 | en       |     0 | A rich and fiery chili sauce. Take care when handling chili peppers. And serve sparingly!                    | basic_html           |
| recipe |       0 |         9 |          18 | es       |     0 | Una rica y ardiente salsa de chile. Tenga cuidado al manejar chiles. ¡Y servir con moderación!               | basic_html           |
| recipe |       0 |         9 |          39 | en       |     0 | A rich and fiery chili sauce. Take care when handling chili peppers. And serve sparingly!                    | basic_html           |
| recipe |       0 |         9 |          39 | es       |     0 | Una rica y ardiente salsa de chile. Tenga cuidado al manejar chiles. ¡Y servir con moderación!               | basic_html           |
| recipe |       0 |         9 |          40 | en       |     0 | A rich and fiery chili sauce. Take care when handling chili peppers. And serve sparingly!                    | basic_html           |
| recipe |       0 |         9 |          40 | es       |     0 | <p>Una rica y ardiente salsa de chile. Tenga cuidado al manejar chiles. ¡Y servir con moderación! aaaa</p>   | basic_html           |
| recipe |       0 |         9 |          41 | en       |     0 | A rich and fiery chili sauce. Take care when handling chili peppers. And serve sparingly!                    | basic_html           |
+--------+---------+-----------+-------------+----------+-------+--------------------------------------------------------------------------------------------------------------+----------------------+
8 rows in set (0.001 sec)

And node_field_data should look something like this:

MariaDB [db]> SELECT * FROM node_field_data WHERE nid = 9;
+-----+-----+--------+----------+--------+-----+---------------------------+------------+------------+---------+--------+------------------+-------------------------------+----------------------------+------------------------------+
| nid | vid | type   | langcode | status | uid | title                     | created    | changed    | promote | sticky | default_langcode | revision_translation_affected | content_translation_source | content_translation_outdated |
+-----+-----+--------+----------+--------+-----+---------------------------+------------+------------+---------+--------+------------------+-------------------------------+----------------------------+------------------------------+
|   9 |  39 | recipe | en       |      1 |   4 | Fiery chili sauce         | 1686645158 | 1686645158 |       1 |      0 |                1 |                          NULL | und                        |                            0 |
|   9 |  39 | recipe | es       |      1 |   4 | Salsa de chile ardiente 2 | 1686645158 | 1687865049 |       1 |      0 |                0 |                             1 | und                        |                            0 |
+-----+-----+--------+----------+--------+-----+---------------------------+------------+------------+---------+--------+------------------+-------------------------------+----------------------------+------------------------------+

3. now delete the Spanish translation on https://drupal-dev.ddev.site/en/node/9/translations

4. Now query the table again - for me I get the same result for node_revision__field_summary - the Spanish language revision data is still there. Although node_field_data now just has one row for English as expected.

If we don't remove old translation content when we delete translations, how can we prevent people from removing languages until it's removed??

@catch: for me, this sounds for me a different issue

there was mentioned an issue about deleting revisions https://www.drupal.org/project/drupal/issues/2925532 →

which also has a related issue about Deleting a translation issue
https://www.drupal.org/project/drupal/issues/2815779 🐛 Deleting a translation leaves behind orphaned revisions Needs work

is this the issue you're talking about?

thanks

The MR does this:

public static function languageUsedByContent($langcode) {
    $entity_type_manager = \Drupal::entityTypeManager();
    foreach ($entity_type_manager->getDefinitions() as $entity_type_id => $entity_type) {
      if ($entity_type instanceof ContentEntityType && $entity_type->isTranslatable()) {
        $query = $entity_type_manager->getStorage($entity_type_id)->getQuery()
          ->condition($entity_type->getKey('langcode'), $langcode)->accessCheck(FALSE);
        if ($entity_type->isRevisionable()) {
          $query->allRevisions();
        }
        $results = $query->range(0, 1)->execute();

        if ($results) {
          return TRUE;
        }
      }
    }
    return FALSE;

That query checks all revisions. 🐛 Deleting a translation leaves behind orphaned revisions Needs work means deleting a translation leaves revisions in the a language - so it will be impossible to get to a point where the language can be removed.

I think that means this is postponed on 🐛 Deleting a translation leaves behind orphaned revisions Needs work , or if not, then we should add test coverage showing how the site admin is able to remove the necessary content in order to be able to delete the language.

added https://www.drupal.org/project/drupal/issues/2815779 🐛 Deleting a translation leaves behind orphaned revisions Needs work as related issue

We could also consider to give the option to the webmaster to delete all the entity translations for this language.
Here is a module who delete translation for entities https://www.drupal.org/project/delete_entity_translations →