diff options
| -rw-r--r-- | activerecord/lib/active_record/relation/spawn_methods.rb | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/relation/spawn_methods.rb b/activerecord/lib/active_record/relation/spawn_methods.rb index 33df8fd06c..f4abaae43e 100644 --- a/activerecord/lib/active_record/relation/spawn_methods.rb +++ b/activerecord/lib/active_record/relation/spawn_methods.rb @@ -15,7 +15,9 @@ module ActiveRecord end def merge(r) - raise ArgumentError, "Cannot merge a #{r.klass.name} relation with #{@klass.name} relation" if r.klass != @klass + if r.klass != @klass + raise ArgumentError, "Cannot merge a #{r.klass.name}(##{r.klass.object_id}) relation with #{@klass.name}(##{@klass.object_id}) relation" + end merged_relation = spawn.eager_load(r.eager_load_values).preload(r.preload_values).includes(r.includes_values) |