ruby on rails - How to create a scope for an intermediate table? -

ruby on rails - How to create a scope for an intermediate table? -

i have 2 tables, :photos, :albums, , matching table between 2 called :photo_listings.

i want show albums have photos inside, so, created scope in albums model:

scope :with_photos, -> {includes(:photos)}

the problem :photos not straight column :albums, because photos , albums matched through :photo_listings. so, how can create scope albums lists albums assigned photos?

photo_listings model

class photolisting < activerecord::base belongs_to :album belongs_to :photo end

album model

class album < activerecord::base has_many :photo_listings end

photo model

has_many :photo_listings has_many :albums, :through => :photo_listings end

you can add together album

class album < activerecord::base has_many :photo_listings has_many :photos, through: :photo_listings # line end

then scope should work. missed photos relation on album model.

ruby-on-rails scope models