Question

I’m trying to retrieve data for all items from a box, a box can have compartments and I’d like to get all compartment info at the box level. items are made polymorphic as boxes won’t necessarily have compartments.

MODEL

class Box < ActiveRecord::Base
  has_many :compartments
  has_many :items, :as => :itemable
end

In my Controller I can get results back with:

@box = Box.find(params[:id])

@itemable = @box.compartments.first

@itemable = @box.compartments.last

VIEW

<% @items.each do |item| %>
<%= item.name %>
<% end %>

but if I then try

@itemable = @box.compartments

OR

@itemable = @box.compartments.find(:all)

I get the error

undefined method `items' for #<ActiveRecord::Array>

OR

undefined method `items' for #<ActiveRecord::Relation>

Can anyone help with getting results back from all compartments?

Answer 1

So in compartments you have

belongs_to :box
has_many :items, :as => :itemable

Is this the case? @box.compartments should return an array of compartments right? It sounds like items is somehow getting called on @box.compartments somehow