[ES indexer] Stabilze indexer when serialized data is corrupted

CHANGELOG-EE

@@ -4,7 +4,8 @@ v 8.5.0 (unreleased)
   - Show warning when mirror repository default branch could not be updated because it has diverged from upstream.
   - More reliable wiki indexer
   - GitLab Pages gets support for custom domain and custom certificate
-  - Fix of Elastic indexer. It should not trigger record validation.
+  - Fix of Elastic indexer. It should not trigger record validation for projects
+  - Fix of Elastic indexer. Stabilze indexer when serialized data is corrupted
 
 v 8.4.4
   - Re-introduce "Send email to users" link in Admin area

lib/elastic/merge_requests_search.rb

@@ -34,13 +34,28 @@ module Elastic
       end
 
       def as_indexed_json(options = {})
-        as_json(
+        as_json({
+          only: [
+            :id,
+            :iid,
+            :target_branch,
+            :source_branch,
+            :title,
+            :description,
+            :created_at,
+            :updated_at,
+            :state,
+            :merge_status,
+            :source_project_id,
+            :target_project_id,
+            :author_id
+          ],
           include: {
             source_project: { only: :id },
             target_project: { only: :id },
             author:         { only: :id }
           }
-        ).merge({ updated_at_sort: updated_at })
+        }).merge({ updated_at_sort: updated_at })
       end
 
       def self.elastic_search(query, options: {})

lib/elastic/milestones_search.rb

@@ -18,7 +18,9 @@ module Elastic
       end
 
       def as_indexed_json(options = {})
-        as_json.merge({ updated_at_sort: updated_at })
+        as_json(
+          only: [:id, :title, :description, :project_id, :created_at]
+        ).merge({ updated_at_sort: updated_at })
       end
 
       def self.elastic_search(query, options: {})

lib/elastic/notes_search.rb

@@ -16,7 +16,9 @@ module Elastic
       end
 
       def as_indexed_json(options = {})
-        as_json.merge({ updated_at_sort: updated_at })
+        as_json(
+          only: [:id, :note, :project_id, :created_at]
+        ).merge({ updated_at_sort: updated_at })
       end
 
       def self.elastic_search(query, options: {})