discourse/app/models/push_subscription.rb

class PushSubscription < ActiveRecord::Base
  belongs_to :user
end

# == Schema Information
#
# Table name: push_subscriptions
#
#  id         :integer          not null, primary key
#  user_id    :integer          not null
#  data       :string           not null
#  created_at :datetime         not null
#  updated_at :datetime         not null
#