Undefined constant Drupal\\search_api_solr\\SolrBackendInterface::SEARCH_API_SOLR_SCHEMA_VERSION

There is no constant with name SEARCH_API_SOLR_SCHEMA_VERSION in Search Api Solr module.
use SEARCH_API_SOLR_MIN_SCHEMA_VERSION instead.

Can confirm the patch in #3 fixes the issue, thank you @keshavvv.

Switching to RTBC

It works. thank you

Thanks. It works with Drupal 10.1.4 and Search Api autocomplete 8.x-1.7

Same here. Many thanks for the fix. This looks like the commit that has broken this:

https://git.drupalcode.org/project/search_api_solr/-/commit/cdf4b1fdc973...

Well, it works but what if search_api_solr has an older version where the old constant has been used? I think the existence of each constant should be checked.

Also, the old constant has been deprecated prior to be deleted. See https://git.drupalcode.org/project/search_api_solr/-/commit/cdf4b1fdc973... :

  /**
   * The current Solr schema version.
   *
   * @deprecated use getPreferredSchemaVersion()
   */
  public const SEARCH_API_SOLR_SCHEMA_VERSION = '4.2.13';

The deprecation notice recommends use of SearchApiSolrBackend::getPreferredSchemaVersion().

Updated MR to use the method, and to fall back to the old < 4.3.0 constant if the method does not exist.

#13's patch works for me and clears the white screen of death on /admin/reports/status

RTBC++ We're currently using this one to charge forward with D10 upgrades on a client project.

Thanks @bvoynick. Looks good to me but is quite difficult to read.

+1 3382226-3.patch working well status update displays again

+1 , hitting this and going to use the patch #13
our /admin/config route is blown otherwise

It works.
Thank you

Thanks a lot for reporting this problem and providing several great patches.

However, checking #3257941: Mention search_api_solr_autocomplete confirms that the only reason we compare the schema version is to detect whether the search_api_solr_autocomplete module is even available. If the getPreferredSchemaVersion() method exists, then that just means that the Solr module version is even newer and we don’t even need to check the version number.

I think the attached patch is a lot easier to read and should work just as well, no matter which Solr module version you’re using.
Please give it a try (and/or review) and I can commit it.

#22 patch works for me. Drupal 9.5.11 with Search API Solr 4.3.0.

Nice work Thomas! Your code comments are very helpful to understand what's going on.

Thanks drunken monkey.

Latest patch installed and working for me on dev/production environments.

Had to delete and recreate the collection locally for some reason but that was probably caused by an earlier update.

Much easier to read.

also to help confirm:
tested patch #22 on local setup of client works!

Great to hear, thanks for all your comments.
Merged this. Thanks again, everyone!
I’ll try to create a new release soon.

tested patch #22 and worked for me.
Thanks, drunken monkey

Patch is merged and released as part of '8.x-1.8'.