class CreateExerciseRandomSettings < ActiveRecord::Migration[5.2]
  def change
    create_table :exercise_random_settings do |t|
      t.integer :difficulty, comment: "难度"
      t.integer :sub_discipline_id, comment: "课程"
      t.integer :quanlity, comment: "题目数量"
      t.integer :item_type, index: true, comment: "题目类型"
      t.integer :exercise_id, index: true, comment: "外键,关联exercise"


      t.timestamps
    end
  end
end