1 files changed, 48 insertions, 0 deletions
diff --git a/db/post_migrate/20200421195234_backfill_status_page_published_incidents.rb b/db/post_migrate/20200421195234_backfill_status_page_published_incidents.rb
new file mode 100644
index 00000000000..fa7a5a9d924
--- /dev/null
+++ b/db/post_migrate/20200421195234_backfill_status_page_published_incidents.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+class BackfillStatusPagePublishedIncidents < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  class Incident < ActiveRecord::Base
+    self.table_name = 'status_page_published_incidents'
+  end
+
+  class StatusPageIssue < ActiveRecord::Base
+    include ::EachBatch
+
+    self.table_name = 'issues'
+
+    scope :published_only, -> do
+      joins('INNER JOIN status_page_settings ON status_page_settings.project_id = issues.project_id')
+        .where('status_page_settings.enabled = true')
+        .where(confidential: false)
+    end
+  end
+
+  def up
+    current_time = Time.current
+
+    StatusPageIssue.published_only.each_batch do |batch|
+      incidents = batch.map do |status_page_issue|
+        {
+          issue_id: status_page_issue.id,
+          created_at: current_time,
+          updated_at: current_time
+        }
+      end
+
+      Incident.insert_all(incidents, unique_by: :issue_id)
+    end
+  end
+
+  def down
+    # no op
+
+    # While we expect this table to be empty at the point of
+    # the up migration, there is no reliable way to determine
+    # whether records were added as a part of the migration
+    # or after it has run.
+  end
+end