Merge pull request #31311 from y-yagi/ignore_no_database_error_when_loading_schema_cache

Ignore `NoDatabaseError` when loading schema cache

1 files changed, 9 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index 15e9c09ffb..4d4b0dc67a 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -1053,7 +1053,15 @@ module ActiveRecord
         end
       end
 
-      def current_version(connection = Base.connection)
+      def current_version(connection = nil)
+        if connection.nil?
+          begin
+            connection = Base.connection
+          rescue ActiveRecord::NoDatabaseError
+            return nil
+          end
+        end
+
         get_all_versions(connection).max || 0
       end