Facet filtering is a type of search filter that allows users to narrow down their search results quickly while preventing zero results from being returned. The facets (or filters) dynamically adjust on the fly based on the user’s previous selections and provide visual feedback about the remaining options – view example.
The Filters add-on provides functionality for implementing a faceted search experience.
The initial setup for implementing Facets in Ajax Load More is easy – all it requires is a couple of settings to be configured in the Options section of a Filter.
Enable facets on a filter group by adjusting a couple of options.
Facets can be enabled on any new or existing Filter instance that uses supported field types and query parameters.
Once a facet has been enabled on a filter, Ajax Load More will handle the indexing and updating of the frontend display.
Display dynamically updating result counts for each facet selection by enabling the Result Count option in a filter group.
Note: Result counts are required to be enabled on each filter group individually.
The following field types are supported when using the faceted filtering in Ajax Load More.
Other field types, such as Star Rating and Range Slider will be supported in a future release.
The following filter query parameters are supported when using the faceted filtering in Ajax Load More.
The following filter hooks are available when using facets functionality;
This filter provides a method to adjust the facet transient expiration time.
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add_filter('alm_filters_facets_transient_expiration', function(){ // Default = 7200 return DAY_IN_SECONDS; }); |
This filter provides a method to adjust the default indexing posts_per_page value which is -1.
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add_filter('alm_filters_facets_posts_per_page', function(){ // Default = -1 return 999; }); |
Below are common questions regarding Ajax Load More facets. If you have a question and don’t see an answer here, please visit the support page and submit your request.
Filters and facets often get mixed up because there’s so much overlap, however, both help to restrict a search to a subset of results.
Facet data is stored in WordPress transients for up to 2 hours and is cleared when a post is published or edited. In this case, transients are used to avoid running expensive WP_Query lookups with every load more and filter action.
Each unique facet combination will contain a transient entry in your database prefixed with alm_facet_filter. The transient will contain an array of facet data that is used to update the available filter options on the frontend of the website.
The Facet index is an array of post IDs that are matched when a filter is changed or updated. Each Facet index is stored as an option in the wp_options table just as Ajax Load More filters are.
A facet index will be rebuilt when:
