Manage has_many_through relationships in Redis.
Simply delcare relationships has following:
Foo.rb
include RedisRelation
has_many_through_redis :bars
has_many_through_redis :attendees, reverse: :attending, class_name: :User
and create your relationships has following:
f = Foo.first
b = Bar.last
f.bars << b
f.bars # returns [b]
f.bar_ids # returns [b.id]
f.bars.remove(b)
f.bars # returns []