From c648f118d9f332648376eba1b8293ad4278e333c Mon Sep 17 00:00:00 2001
From: Martin Fenner <martin.fenner@datacite.org>
Date: Fri, 12 Apr 2019 14:30:39 +0200
Subject: [PATCH] cursor-based pagination for activities api. #238

---
 app/models/concerns/indexable.rb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/models/concerns/indexable.rb b/app/models/concerns/indexable.rb
index eadb1b2b3..d1ddc9583 100644
--- a/app/models/concerns/indexable.rb
+++ b/app/models/concerns/indexable.rb
@@ -108,6 +108,10 @@ def query(query, options={})
         from = 0
         search_after = [options.dig(:page, :cursor)]
         sort = [{ _id: { order: 'asc' }}]
+      elsif self.name == "Activity" && options.dig(:page, :cursor).present?
+        from = 0
+        search_after = [options.dig(:page, :cursor)]
+        sort = [{ created: { order: 'asc' }}]
       else
         from = (options.dig(:page, :number) - 1) * options.dig(:page, :size)
         search_after = nil