```ruby
# == Schema Information
#
# Table name: access_levels
#
#  id         :integer          not null, primary key
#  name       :string(255)
#  event_id   :integer
#  created_at :datetime
#  updated_at :datetime
#  capacity   :integer
#  price      :integer
#  public     :boolean
#

class AccessLevel < ActiveRecord::Base
  belongs_to :event
  has_many :included_zones, dependent: :destroy
  has_many :zones, through: :included_zones

  validates :name, presence: true
  validates :public, presence: true
  validates :price, presence: true, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
  validates :capacity, presence: true, numericality: { only_integer: true, greater_than: 0 }

  def set_zones_by_ids zones
    self.zones = self.event.zones.find zones
    self.save
  end

  def price
    (read_attribute(:price) || 0) / 100.0
  end

  def price=(value)
    if value.is_a? String then value.sub!(',', '.') end
    write_attribute(:price, (value.to_f * 100).to_int)
  end

end
```

Add registrations to an access level
user
```ruby
# == Schema Information
#
# Table name: access_levels
#
#  id         :integer          not null, primary key
#  name       :string(255)
#  event_id   :integer
#  created_at :datetime
#  updated_at :datetime
#  capacity   :integer
#  price      :integer
#  public     :boolean
#

class AccessLevel < ActiveRecord::Base
  belongs_to :event

  has_many :included_zones, dependent: :destroy
  has_many :zones, through: :included_zones

  has_many :accesses, dependent: :destroy
  has_many :registrations, through: :accesses

  validates :name, presence: true
  validates :public, presence: true
  validates :price, presence: true, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
  validates :capacity, presence: true, numericality: { only_integer: true, greater_than: 0 }

  def set_zones_by_ids zones
    self.zones = self.event.zones.find zones
    self.save
  end

  def price
    (read_attribute(:price) || 0) / 100.0
  end

  def price=(value)
    if value.is_a? String then value.sub!(',', '.') end
    write_attribute(:price, (value.to_f * 100).to_int)
  end

end
```
assistant