add facetFilters

docs/_config.yml

@@ -26,15 +26,20 @@ SCALA_VERSION: "2.12.10"
 MESOS_VERSION: 1.0.0
 SPARK_ISSUE_TRACKER_URL: https://issues.apache.org/jira/browse/SPARK
 SPARK_GITHUB_URL: https://github.com/apache/spark
-# Before a new release, we should apply a new `apiKey` for the new Spark documentation
-# on https://docsearch.algolia.com/. Otherwise, after release, the search results are always based
-# on the latest documentation(https://spark.apache.org/docs/latest/) even when visiting the
-# documentation of previous releases.
+# Before a new release, we should:
+#   1. update the `version` array for the new Spark documentation
+#      on https://github.com/algolia/docsearch-configs/blob/master/configs/apache_spark.json.
+#   2. update the value of `facetFilters.version` in `algoliaOptions` on the new release branch.
+# Otherwise, after release, the search results are always based on the latest documentation
+# (https://spark.apache.org/docs/latest/) even when visiting the documentation of previous releases.
 DOCSEARCH_SCRIPT: |
   docsearch({
       apiKey: 'b18ca3732c502995563043aa17bc6ecb',
       indexName: 'apache_spark',
       inputSelector: '#docsearch-input',
       enhancedSearchInput: true,
+      algoliaOptions: {
+        'facetFilters': ["version:latest"]
+      },
       debug: false // Set debug to true if you want to inspect the dropdown
   });