Rails Migration 使列为 null =>真的

本文介绍了Rails Migration 使列为 null =>真的的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我最初创建了一个列为的表

I had originally created a table with column as

t.string "email", :default => "", :null => false

要求已更改，现在我需要允许电子邮件为空.如何编写迁移以使 :null => true

The requirement has changed and now I need to allow email to be null. How can I write a migration to make :null => true

推荐答案

试试:

change_column :table_name, :email, :string, null: true