ruby-on-rails - ActiveRecord 创建 : pass in an array of attributes

Question

我想知道是否有 Rails 方法通过传入属性数组来创建多个记录。

例如，代替

MyModel.create!(attr_1: some_attr, attr_2: 1)
MyModel.create!(attr_1: some_attr, attr_2: 2)
MyModel.create!(attr_1: some_attr, attr_2: 3)
MyModel.create!(attr_1: some_attr, attr_2: 4)

我想做类似的事情:

MyModel.create!(attr_1: some_attr, attr_2: [1,2,3,4])

但它不起作用。有没有类似的方法可以在不循环的情况下实现这一目标？

Answer 1

根据文档，您可以 create 来自散列数组的记录:

The attributes parameter can be either be a Hash or an Array of Hashes. These Hashes describe the attributes on the objects that are to be created.

 MyModel.create([{attr_1: some_attr, attr_2: 4}, {attr_1: some_attr, attr_2: 5}])