I have three tables: users --< users_entities >-- entities
User model: many_to_many :entities, :class => Contact, :join_table => :users_entities, :left_key => :user_id, :right_key => :entity_id Entity model: many_to_many :users, :class => User, :join_table => :users_entities, :left_key => :entity_id , :right_key => :user_id In my view, I like to be able to indicate that an entity is a favorite: class EntitiesController get '/' do @entities = Entity.sequel_append(:is_favorite, [a correlated, scalar query]).order(:name).all erb :'contacts/index' end end If I was going to approach this as a query, I would write: select e.* ,case when ( select 1 from users_entities where entity_id = e.id and user_id=[user_id] ) then 'Y' else 'N' end is_favorite from entities e This is a step in the right direction: DB[:entities].join(:users_entities, [[:entity_id,:id]]).where(user_id: 1) What's the recommend approach to including the sub-query? Maybe using empty? -- You received this message because you are subscribed to the Google Groups "sequel-talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to sequel-talk+unsubscr...@googlegroups.com. To post to this group, send email to sequel-talk@googlegroups.com. Visit this group at https://groups.google.com/group/sequel-talk. For more options, visit https://groups.google.com/d/optout.