1 files changed, 5 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/associations/has_many_association.rb b/activerecord/lib/active_record/associations/has_many_association.rb
index 607ed0da46..a3fcca8a27 100644
--- a/activerecord/lib/active_record/associations/has_many_association.rb
+++ b/activerecord/lib/active_record/associations/has_many_association.rb
@@ -125,7 +125,11 @@ module ActiveRecord
         end
 
         def foreign_key_present?
-          owner.attribute_present?(reflection.association_primary_key)
+          if reflection.klass.primary_key
+            owner.attribute_present?(reflection.association_primary_key)
+          else
+            false
+          end
         end
     end
   end