How about adding something like this into your User model? has_many :active_events, :through => :event_users, :class_name => “Event”, :source => :event, :conditions => [‘event_users.active = ?’,true] After that you should be able to get active events for a user just by calling: User.first.active_events
go to your Recipe model and add the following line accepts_nested_attributes_for :steps The line is required by formtastic, not active admin. Check https://github.com/justinfrench/formtastic for formtastic documentation
In Rails 4, Associations have an optional scope parameter that accepts a lambda that is applied to the Relation (cf. the doc for ActiveRecord::Associations::ClassMethods) class SolarSystem < ActiveRecord::Base has_many :planets, -> { life_supporting } end class Planet < ActiveRecord::Base scope :life_supporting, -> { where(‘distance_from_sun > ?’, 5).order(‘diameter ASC’) } end In Rails 3, the where_values … Read more
Bah, found it here: https://stackoverflow.com/a/5570221/417872 City.includes(:photos).where(photos: { city_id: nil })
Give this a shot: has_many :jobs, foreign_key: ‘user_id’, class_name: ‘Task’ Note, that :as is used for polymorphic associations. Also, foreign_key option for has_many.