class JamRuby::EventSession < ActiveRecord::Base

  attr_accessible :event_id, :user_id, :band_id, :starts_at, :ends_at,  :pinned_state, :position, :img_url, :img_width, :img_height, as: :admin

  belongs_to :user, class_name: 'JamRuby::User'
  belongs_to :band, class_name: 'JamRuby::Band'
  belongs_to :event


  validates :event, presence: true
  validates :pinned_state, :inclusion => {:in => [nil, :not_started, :over]}
  validate :one_of_user_band

  before_validation     :sanitize_active_admin

  def sanitize_active_admin
    puts self.inspect
    self.img_url = nil if self.img_url == ''
    self.user_id = nil if self.user_id == ''
    self.band_id = nil if self.band_id == ''
    self.pinned_state = nil if self.pinned_state == ''
  end

  def one_of_user_band
    if band && user
      errors.add(:user, 'specify band, or user. not both')
    end
  end
end