Question

When i try to access to a method created by the relationship has_many – belogs_to, i get an undefined method error . Here is the code (semplified) :

local.rb (model) :

class Local < ActiveRecord::Base
   has_many :foods, dependent: :destroy, :foreign_key => 'local_id'
end

food.rb :

class Food < ActiveRecord::Base
   attr_accessible :descrizione, :nome, :prezzo, :voto
   belongs_to :local, :foreign_key => 'local_id'
end

the /locals/show.html.erb view that calls the create action on foodsController :

...

<%= form_for :food, :url => {:controller  => :foods, :action => :create} do |f| %>
...
<% end %>

foods_controller.rb

class FoodsController < ApplicationController
    def create
        @food = @local.foods.build(params[:food])
    end
end

The problem is raised here in foods_controller on create action : “undefined method ‘foods’ ‘ . Why? the relationship should enable the local.foods method?
(@local is defined in locals_controller.rb, @local = Local.find(params[:id]) , and local_id attribute is defined in schema.rb and in the last db migration , just to be clear)

Thank you

Answer 1

Since @local is defined in a different controller, you won’t be able to access it from FoodController.