什么是用于创建表的Rails迁移？

Question

创建表的Rails迁移是什么？

我尝试了这个迁移生成器：

$ rails g migration CreateQuestions user:references question_title:string question_text:text approved:boolean

这会创建一个似乎缺少常规id和timestamps字段的迁移。我弄乱了发电机吗？

class CreateQuestions < ActiveRecord::Migration
  def change
    create_table :questions do |t|
      t.references :user, index: true
      t.string :question_title
      t.text :question_text
      t.boolean :approved
    end
  end
end

Answer 1

1. "A primary key column called id will also be added implicitly, as it's the default primary key for all Active Record models."

2. 如果您想添加timestamps，请将其添加到您的迁移文件中：

   t.timestamps