モデルのアソシエーション

gistfile1.rb

class Event < ActiveRecord::Base
  has_many :days_infos
  has_many :participants
  # has_many :users
  attr_accessible :event_name, :explanation, :password, :url
end

class Participant < ActiveRecord::Base
  belongs_to :event
  belongs_to :user
#  has_one :user
  attr_accessible :create_date, :event_id, :up, :user_id
end