diff --git a/lib/ransack/adapters/mongoid/base.rb b/lib/ransack/adapters/mongoid/base.rb
index 740b3c8..0eeba3e 100644
--- a/lib/ransack/adapters/mongoid/base.rb
+++ b/lib/ransack/adapters/mongoid/base.rb
@@ -73,7 +73,7 @@ module Ransack
           end
 
           def reflect_on_all_associations_all
-            reflect_on_all_associations(:belongs_to, :has_one, :has_many)
+            reflect_on_all_associations(:belongs_to, :has_one, :has_many, :embeds_many, :embedded_in)
           end
 
           # For overriding with a whitelist of symbols
@@ -87,6 +87,10 @@ module Ransack
             []
           end
 
+          def custom_join_ast *args
+            []
+          end
+
           def first(*args)
             if args.size == 0
               super