Ruby on rails 通过create命令，单行有多个

这些是我们的模型：

app/models/ice_cream.rb

class IceCream < ActiveRecord::Base
  has_many :ingredients
  has_many :sundaes, through: :ingredients
end

class Sundae < ActiveRecord::Base
  has_many :ingredients
  has_many :ice_creams, through: :ingredients
end

class Ingredient < ActiveRecord::Base
  belongs_to :ice_cream
  belongs_to :sundae
end

---

是否可以将最后三行代码作为一个命令编写？如何做？

您应该能够做到：

Sundae.create(name: 'abc', ingredients: [Ingredient.create(ice_cream: IceCream.first, quantity: 2), Ingredient.create(ice_cream: IceCream.last, quantity: 1)])

由于

ActiveRecord

将在

Sundae

类中添加一个函数

components=

，当您为

配料使用
时，这也应该起作用：

Sundae.create(name: 'abc').tap{ |sundae| sundae.ingredients.create([{ice_cream: IceCream.first, quantity: 2}, {ice_cream: IceCream.first, quantity: 1}])}

非常感谢你！工作完美。
Sundae.create(name: 'abc').tap{ |sundae| sundae.ingredients.create([{ice_cream: IceCream.first, quantity: 2}, {ice_cream: IceCream.first, quantity: 1}])}