educoder/app/models/hack_set.rb

class HackSet < ApplicationRecord
  #validates :input, presence: { message: "测试集输入不能为空" }
  validates :output, presence: { message: "测试集输出不能为空" }
  validates_uniqueness_of :input, scope: [:hack_id, :input], message: "多个测试集的输入不能相同"
  # 编程题测试集
  belongs_to :hack
end