"NoMethodError" where to pick?

Question

Ruby on Rails

I'm now studying rails on screencasts from rubyscreencasts, it came to adding properties to the model and the console shines "NoMethodError: undefined method `attr_accessible' for Item"
I understand that this is due to differences in rails versions? what should I do?

Answer 1

Rails version 4 removed attr_accessible now uses a different approach from mass assignment
Read Strong Parameters
or an example

class PersonsController < ApplicationController
  def create
    Person.create(person_params)
  end

  private

  def person_params
    params.require(:person).permit(:name, :age)
  end
end

Answer 2

attach the model code
, you can also link to the screencast that you kick

Answer 3

Read about strong_parameters, version 3 screencast