Devise Authentication unscoped

vip_authenticatable.rb

# lib/vip_authenticatable.rb
#
# We introduce :vip_authenticatable strategy to Warden.
# With this strategy your login form might look something like
#
# <form action="/path/to/create/session">
#   <input name="vip[:id]" placeholder="Enter your VIP No.">
#   <input type="submit">
# </form>
#
Warden::Strategies.add(:vip_authenticatable) do
  def valid?
    params[:vip] && params[:vip][:id]
  end

  def authenticate!
    vip = User.vip.find(params[:vip][:id])

    if vip
      success! vip
    elsif !halted?
      fail! :invalid
    end
  end
end