discourse/app/models/post_reply_key.rb

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class PostReplyKey < ActiveRecord::Base
belongs_to :post
belongs_to :user
before_validation { self.reply_key ||= self.class.generate_reply_key }
validates :post_id, presence: true, uniqueness: { scope: :user_id }
validates :user_id, presence: true
validates :reply_key, presence: true
def reply_key
super&.delete('-')
end
def self.generate_reply_key
SecureRandom.hex(16)
end
end
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# == Schema Information
#
# Table name: post_reply_keys
#
# id :bigint(8) not null, primary key
# user_id :integer not null
# post_id :integer not null
# reply_key :uuid not null
# created_at :datetime not null
# updated_at :datetime not null
#
# Indexes
#
# index_post_reply_keys_on_reply_key (reply_key) UNIQUE
# index_post_reply_keys_on_user_id_and_post_id (user_id,post_id) UNIQUE
#