從表中刪除外鍵-Ruby on Rails

Question

我需要從具有遷移功能的表中刪除外鍵

這是我具有外鍵的表：

class CreatePriceWorkshops < ActiveRecord::Migration
  def change
    create_table :price_workshops do |t|
      t.float :price

      t.timestamps null: false
    end
  end
end

通過此遷移，我創建了外鍵：

class AddTypeMoneysToPriceWorkshops < ActiveRecord::Migration
  def change
    add_reference :price_workshops, :type_money, index: true, foreign_key: true
  end
end

這樣我嘗試刪除外鍵

class RemoveTypeMoneyFromPriceWorkshops < ActiveRecord::Migration
  def change
    remove_column :price_workshops, :type_money_id, :integer
  end
end

Answer 1

您是否按照官方文檔嘗試了remove_foreign_key而不是remove_column ？

class RemoveTypeMoneyFromPriceWorkshops < ActiveRecord::Migration
  def change
    remove_foreign_key :price_workshops, :type_money
  end
end

Answer 2

class RemoveTypeMoneyFromPriceWorkshops < ActiveRecord::Migration
  def change
    remove_reference(:price_workshops, :type_money, index: true, foreign_key: true)
  end
end

從官方文檔，請在此處查看更多信息