[OpenSearch](https://opensearch.org/) is now formally supported as an alternative to Elasticsearch. For configuration details, see [OpenSearch configuration](opensearch). This feature was developed by Matt Westcott.
* Add [`wagtailcache`](wagtailcache) and [`wagtailpagecache`](wagtailpagecache) template tags to ensure previewing Pages or Snippets will not be cached (Jake Howard)
* Filter out comments on Page editing counts that do not correspond to a valid field / block path on the page such as when a field has been removed (Matt Westcott)
* Migrate all other `data-tippy` HTML attribute usage to the Stimulus data-*-value attributes for w-tooltip & w-dropdown (Subhajit Ghosh, LB (Ben) Johnston)
* Replace `<script type="text/django-form-template"><-/script>` template approach with HTML `template` elements in InlinePanel and expanding formset (Mansi Gundre, Subhajit Ghosh, LB (Ben) Johnston)
### Edit and delete URLs in `ModelViewSet` changed to allow non-integer primary keys
To accommodate models with non-integer primary keys, the URL patterns for the edit and delete views in {class}`~wagtail.admin.viewsets.model.ModelViewSet` have been changed.
Relative to the viewset's {attr}`~wagtail.admin.viewsets.base.ViewSet.url_prefix`, the following changes have been made:
- The edit URL pattern has been changed from `<int:pk>/` to `edit/<str:pk>/`
- The delete URL pattern has been changed from `<int:pk>/delete/` to `delete/<str:pk>/`
If you use {func}`~django.urls.reverse` with {meth}`~wagtail.admin.viewsets.base.ViewSet.get_url_name` to generate the URLs for these views, no changes are needed. However, if you have hard-coded these URLs in your code, you will need to update them to match the new patterns.
Redirects for the legacy URLs are in place for backwards compatibility, but will be removed in a future release.
The URLs for snippets underwent similar changes in Wagtail 2.14. The redirects for the legacy URLs in {class}`~wagtail.snippets.views.snippets.SnippetViewSet` have now been marked for removal in a future release.
### `ModelViewSet` automatically registers the model to the reference index
Models that are registered with a `ModelViewSet` now have reference index tracking enabled by default. This means that you no longer need to call `ReferenceIndex.register_model()` in your app's `ready()` method for such models. If this is undesired, you can disable it by setting {attr}`~wagtail.admin.viewsets.model.ModelViewSet.add_to_reference_index` to `False` on the `ModelViewSet` subclass. For more details, see [](managing_the_reference_index).
### Groups `IndexView.results_template_name` renamed from `results.html` to `index_results.html`
The `IndexView`'s `results_template_name` attribute in the `GroupViewSet` has been renamed from `wagtailusers/groups/results.html` to `wagtailusers/groups/index_results.html` for consistency with the other viewsets. If you have customised or extended the template, e.g. for [](customising_group_views), you will need to rename it to match the new name.
### Breadcrumbs now use different data attributes and events
The undocumented JavaScript implementation for the header breadcrumbs component has been migrated to a Stimulus controller and now uses different data attributes.
This may impact custom header implementations that relied on the previous approach, custom breadcrumbs that did not use `breadcrumbs` and require the expand/collapse behaviour may be impacted.
### `window.updateFooterSaveWarning` global util removed
The undocumented global util `window.updateFooterSaveWarning` has been removed, this is part of the footer 'unsaved' messages toggling behaviour on page forms.
This behaviour has now moved to a Stimulus controller and leverages DOM events instead. Calling this function will do nothing and in a future release will throw an error.
You can implement roughly the equivalent functionality with this JavaScript function, however, this will not be guaranteed to work in future releases.
### Snippets templates refactored to reuse the shared `slim_header.html` template
The templates for the snippets views have been refactored to reuse the shared `slim_header.html` template. If you have customised or extended the templates, e.g. for [](wagtailsnippets_custom_admin_views), you will need to update them to match the new structure. As a result, the following templates have been removed:
In most cases, the usage of those templates can be replaced with the `wagtailadmin/shared/headers/slim_header.html` template. Refer to the snippets views and templates code for more details.
