btrc-hub/backend/app/models/ip_address.rb

class IpAddress < ApplicationRecord
  validates :ip_address, presence: true, length: { maximum: 16 }

  has_many :user_ips, dependent: :destroy
  has_many :users, through: :user_ips

  def banned? = banned_at?
  def banned = banned?

  def banned= value
    bool = ActiveModel::Type::Boolean.new.cast(value)
    self.banned_at = bool ? banned_at || Time.current : nil
  end
end