Question

Is there a proper way to write this, or am I approaching this wrong? I need to do a nested include. I found This Link but it doesn’t seem to work.

def show
    @showring = Ring.includes(:stones => :upcharges, :variations).find(params[:id])
end

I have 3 tables…
Rings which has_many stones
Stones which has_many upcharges

Models:

class Ring < ActiveRecord::Base
  has_many :stones
end

class Stone < ActiveRecord::Base
  has_many :upcharges  
  belongs_to :ring  
end

class Upcharge < ActiveRecord::Base
  belongs_to :stone
end

Answer 1

def show
    @showring = Ring.includes([{:stones => :upcharges}, :variations]).find(params[:id])
end

Added some brackets 🙂

Getting all upcharges :

@showring.stones.each do |s|
  s.upcharges #Do whatever you need with it
end

Option 2 : Declare a has_many :through

class Ring < ActiveRecord::Base
  has_many :stones
  has_many :upcharges, :through => :stones
end

Then in the view :

<%= @showring.upcharges.to_json.html_safe %>