1 files changed, 31 insertions, 0 deletions
diff --git a/db/migrate/20210324131727_migrate_elastic_index_settings.rb b/db/migrate/20210324131727_migrate_elastic_index_settings.rb
new file mode 100644
index 00000000000..4dcfc6cf952
--- /dev/null
+++ b/db/migrate/20210324131727_migrate_elastic_index_settings.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class MigrateElasticIndexSettings < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  ALIAS_NAME = [Rails.application.class.module_parent_name.downcase, Rails.env].join('-')
+
+  class ElasticIndexSetting < ActiveRecord::Base
+  end
+
+  class ApplicationSetting < ActiveRecord::Base
+  end
+
+  def up
+    setting = ApplicationSetting.first
+    number_of_replicas = setting&.elasticsearch_replicas || 1
+    number_of_shards = setting&.elasticsearch_shards || 5
+
+    return if ElasticIndexSetting.exists?(alias_name: ALIAS_NAME)
+
+    ElasticIndexSetting.create!(
+      alias_name: ALIAS_NAME,
+      number_of_replicas: number_of_replicas,
+      number_of_shards: number_of_shards
+    )
+  end
+
+  def down
+    ElasticIndexSetting.where(alias_name: ALIAS_NAME).delete_all
+  end
+end