Indexers 

Standard fields 

Every indexer sends these fields to Algolia:

Field mapping 

Which record fields are sent to Algolia, and under which attribute name, is configured per table in TypoScript under module.tx_typo3searchalgolia.indexer.<table>.fields, in the form <record field> = <attribute name>. The defaults are listed on the page of each indexer.

When records are indexed 

Records are indexed through the indexing queue:

• Creating or updating a record in the backend queues it for reindexing. A hidden record, or one with Include in Search disabled, is removed from the queue and from the index instead. Deleting a record removes it from the queue and from the index once the record is really deleted. A delete that is refused changes nothing. An enabled record that no indexing service accepts any longer, for example a page of a page type that is not indexed or a file that was moved out of the indexed folder, is removed from the index when it is saved or moved. The same happens when a file is queued by hand from its context menu. That entry is offered for files that at least one file indexing service accepts and whose metadata the user may edit. Queueing such a file removes its document from every index in which no consulted file indexing service accepts the file.

  The removal is decided for each search index separately. The consulted services are the indexing services of the record's own site and, for files, every file indexing service. The document is only removed from an index when none of the consulted services that write to that index accepts the record. A service of another site is not consulted, so the document is kept when such a service writes to the same index, and a warning is logged. The former site of a moved record is the exception, see below.

  A file is only treated as no longer accepted when the allowed file extensions are configured. Otherwise its document is kept and a warning is logged. A file whose extension is no longer in the allowed list is rejected like any other file, so renaming or replacing a file with one of another extension removes its document. A file indexing service without a file collection, or with hidden ones only, rejects every file. If it is the only service that writes to its index and the extensions are configured, saving a file with an allowed extension removes its document. A failure while removing the document of a rejected record is logged as an error and does not abort the save. An enabled record that the backend creates and a file that is uploaded or copied under a new name normally have no document yet, so nothing is removed for them. A file that is replaced, through an upload with the conflict mode replace or with the replace function of the file list, keeps its metadata record and goes through the check.

  Deleting a page also removes its subpages, the content elements on all of them, the translations of the pages and the records of other indexed tables that are stored on them, for example news, from the index. This includes hidden content elements and ones outside of their start and end time, and the subtree below recycler and backend user section pages. The indexing services are resolved before the deletion, so the documents are removed as well when the indexing service records are stored in the deleted tree. The documents are removed with the indexing services of the site of the deleted page and of every site root below it. A record that DataHandler leaves behind below the deleted page, for example a content element the user may not edit, keeps its document.

  Publishing a delete or a move from a workspace is handled like the live command. The publish deletes or moves the live record through the version command, so the documents are removed or decided for the parent that the live record has after the publish. This needs the workspaces extension, see Workspace support.

  Deleting the translation of a page removes the records of that language that are stored on the page of the default language. Deleting a record also removes its translations and the child records of its inline relations that store the children through a foreign field and have no foreign table field. An example is the items of a content element. Their translations are removed too, as far as they are deleted with the record. A relation whose configuration keeps its children when the parent is deleted is not followed by DataHandler, so the documents of such children stay. Children that the parent stores as a list in a field of its own are not looked at. Deleting a file in the file list removes the document of the file. An error that the search engine raises is logged and does not abort the deletion. The documents are removed in blocks, and a block that fails does not stop the next one.

  A search engine that fails on consecutive blocks ends that removal, and what was not sent is logged. An unreachable search engine therefore costs the request of the editor a few failed removal calls for each table and indexing service of the deletion, and not one for every block. The removal of a document that failed or was not sent is not retried by the same deletion. The document of a deleted record stays in the index until the index is cleared and built again. The document of a record that still exists is removed by the next save or move that rejects the record.

  A record with a start time in the future or an end time in the past, for example a page or content element, is not accepted by the indexer, so its document is removed when it is saved. It is not queued again when the start time is reached. Save it again or queue the records anew after the start time.

  A save that leaves a page enabled removes the document of the saved record itself and not the ones of the subpages and content elements that it queues along with it. A save that hides a page removes the content elements of that page. Its subpages are decided only when the page has Extend to Subpages enabled after the save, in which case their documents are removed, or when the same save switches it off, in which case they are queued again. The move of a page decides its subpages and their content elements, see below. The translations and workspace versions of file metadata are not decided, because their own save leaves the document of the live record.

  A page or content element that is moved to another site is also checked against the indexing services of its former site, so its document is removed from the index of that site, unless a service of either site that writes to the same index still accepts the record.

  The subpages of a moved page and their content elements are decided the same way, also when the page stays in its site and only leaves the selected page tree of a service. The records that are still accepted are queued again. A site root below the moved page keeps its own site and is left out together with everything below it, and a site root that is moved does not change the site of its tree. A page that is hidden or not published at the moment and extends that state to its subpages is decided itself, but what lies below it is not, and neither are the subpages of a moved page that is in that state. The page that a content element was moved away from is queued again by the page indexing services of its own site that include content elements, and so is the page that received the element. The translations of a page are not decided. The page walk of an indexing service covers the default language only, and a page indexing service without a page selection accepts translations as well, which a move does not decide. The translations of a moved content element are decided with the element. So are its inline child records of the same table, which are content elements, and their translations. This holds for the relations that store the children through a foreign field.

  The records of other indexed tables that are stored on a moved page are not decided again.

  The indexing services are resolved after the move. Whether a service that is stored inside the moved tree is taken for one of the former or one of the new site depends on cached rootlines, so the move of such a tree can leave documents of the former site in place. The configuration of the indexing service says how to avoid this, see Indexing service.

  The saved record itself is only queued by indexing services of its own site, see Search engine, except for files, which every file indexing service considers. Saving an enabled page also queues its content elements for every content element indexing service that covers them, whatever site the service belongs to. Saving a hidden page, one with Include in Search disabled or one that is outside of its publication window removes its content elements from the queue and the index instead. A content element on such a page is not queued either, because the page itself is not indexed. A visible page below a hidden page, or one outside of its publication window, is not affected, unless that page has Extend to Subpages enabled. The frontend hides its subpages as well, so their documents and the ones of their content elements are removed with it, and queued again when the page is shown again. Pages below a hidden subpage that does not extend its state are skipped like in the Queue module and are not queued again.

• The Queue backend module queues all records of the selected indexing services. It skips hidden subpages of the pages selected in Pages (recursively), together with their subpages and the records on them.
• The console command mkk:queue:index:worker, usually run as a scheduler task, processes the queue and sends the records to Algolia. A record that Algolia rejects because it is too big is logged as a warning and removed from the queue without being indexed, so it is not retried on every run.
• Changes to a system category queue the records assigned to it again, see Category changes.

Category changes 

When a system category is saved, created or deleted in the live workspace, the records assigned to it or to one of its subcategories through sys_category_record_mm are put into the indexing queue again. Every fieldname of the assignment counts. The records are queued through the indexers responsible for them. These are the indexing services of the page tree the record belongs to, and for files every file indexing service. Values derived from the category therefore end up in the index without editing each record.

The following rules apply:

• Records whose assignment the save itself removes are queued as well, for example in the Items tab of the category.
• Records that an indexer does not accept are skipped as usual.
• Like in a full rebuild of the queue, pages below a hidden subpage of a recursively selected page tree are skipped too.
• Records that the indexer still accepts stay in the search index until the queue worker has indexed them again. Records that it no longer accepts are not removed from the index.
• Publishing a category from a workspace or restoring a deleted one queues the records it is assigned to at that point. Assignments that were removed inside a workspace are not covered.
• Hidden or start and end time restricted subcategories are skipped together with their subtrees. This assumes that your documents carry the title path of a category only up to its first category that is not visible. If your documents also include hidden ancestors, add those records through the event described below.

If your records reference categories in another way, for example through a plain integer column of a single select category field, listen to MeineKrankenkasse\Typo3SearchAlgolia\Event\CollectCategoryRecordsEvent and add those records with addRecordUids():

use MeineKrankenkasse\Typo3SearchAlgolia\Event\CollectCategoryRecordsEvent;

final readonly class AddReferencingPagesEventListener
{
    public function __invoke(CollectCategoryRecordsEvent $event): void
    {
        // Your own lookup of the pages referencing the category
        $pageUids = $this->pageRepository->findUidsReferencingCategory($event->getCategoryUid());

        $event->addRecordUids('pages', $pageUids);
    }
}

Register the listener in the Configuration/Services.yaml of your extension:

services:
    Vendor\MySitePackage\EventListener\AddReferencingPagesEventListener:
        tags:
            -   name: event.listener
                identifier: 'my-site-package/add-referencing-pages'
                event: MeineKrankenkasse\Typo3SearchAlgolia\Event\CollectCategoryRecordsEvent