rails十进制精度和小数位数 [英] rails decimal precision and scale

问题描述

我在Rails应用程序中大约有30个表，我想更改一些小数列的精度和小数位数的大约6个表.您如何对已经存在的列执行此操作?您是否需要分别进行每个新迁移，还是可以一次完成所有迁移.

I have about 30 tables in a rails app and there are about 6 tables for which I would like to change the precision and scale of some of the decimal columns. How do you go about doing that for already existing columns? Do you need to do each new migration separately, or can they all be done at once.

推荐答案

change_column :table_name, :column_name, :type

将更新列的类型.

引用: http://apidock.com/rails/ActiveRecord/ConnectionAdapters/SchemaStatements /change_column

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