Rails - order by joint attribute -


i upgraded project rails 4 , i'm getting error on line : 

group.first.event_joins.order(event: [:threshold]).reverse

this line should select event_joins , order them threshold. threshold column in event table not in event_joins table. like order event_joins event treshold. how can write in rails 4 ?

the error : 

argumenterror: direction "[:threshold]" invalid. valid directions are: [:asc, :desc, :asc, :desc, "asc", "desc", "asc", "desc"]

thanks

this should work:

group.first.event_joins.order('events.threshold').reverse

rails 4 supports hash arguments, eg order(model: :asc) have no idea how make work through associations.


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