class CreateReviews < ActiveRecord::Migration[8.1]
  def change
    create_table :reviews do |t|
      t.references :word, null: false, foreign_key: true
      t.string  :status,      null: false, default: "new"
      t.integer :interval,    null: false, default: 0
      t.integer :repetitions, null: false, default: 0
      t.float   :ease_factor, null: false, default: 2.5
      t.datetime :due_at
      t.datetime :last_reviewed_at
      t.timestamps
    end
    add_index :reviews, :status
    add_index :reviews, [ :status, :due_at ]
  end
end