Trigger iid logic from GitHub importer for milestones.

2 files changed, 14 insertions, 2 deletions

diff --git a/lib/gitlab/github_import/bulk_importing.rb b/lib/gitlab/github_import/bulk_importing.rb
index 147597289cf..da2f96b5c4b 100644
--- a/lib/gitlab/github_import/bulk_importing.rb
+++ b/lib/gitlab/github_import/bulk_importing.rb
@@ -15,10 +15,12 @@ module Gitlab
       end
 
       # Bulk inserts the given rows into the database.
-      def bulk_insert(model, rows, batch_size: 100)
+      def bulk_insert(model, rows, batch_size: 100, pre_hook: nil)
         rows.each_slice(batch_size) do |slice|
+          pre_hook.call(slice) if pre_hook
           Gitlab::Database.bulk_insert(model.table_name, slice)
         end
+        rows
       end
     end
   end
diff --git a/lib/gitlab/github_import/importer/milestones_importer.rb b/lib/gitlab/github_import/importer/milestones_importer.rb
index c53480e828a..94eb9136b9a 100644
--- a/lib/gitlab/github_import/importer/milestones_importer.rb
+++ b/lib/gitlab/github_import/importer/milestones_importer.rb
@@ -17,10 +17,20 @@ module Gitlab
         end
 
         def execute
-          bulk_insert(Milestone, build_milestones)
+          # We insert records in bulk, by-passing any standard model callbacks.
+          # The pre_hook here makes sure we track internal ids consistently.
+          # Note this has to be called before performing an insert of a batch
+          # because we're outside a transaction scope here.
+          bulk_insert(Milestone, build_milestones, pre_hook: method(:track_greatest_iid))
           build_milestones_cache
         end
 
+        def track_greatest_iid(slice)
+          greatest_iid = slice.max { |e| e[:iid] }[:iid]
+
+          InternalId.track_greatest(nil, { project: project }, :milestones, greatest_iid, ->(_) { project.milestones.maximum(:iid) })
+        end
+
         def build_milestones
           build_database_rows(each_milestone)
         end