Rails:修改由脚手架生成的模型 [英] Rails: Modifying a Model Generated by Scaffolding

问题描述

如何修改使用建模生成的模型?例如，模型myModel最初具有a，b和c列，但现在我想添加d列.

How do you modify a model you've generated using modeling? For example, the model myModel originally had columns a, b and c, but I now want to add column d.

推荐答案

Rails 3及更高版本使用以下代码:

Rails 3 and above use the following code :

rails generate migration add_fieldname_id_to_tablename fieldname:string

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路轨2

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Rails 2

ruby script/generate migration add_fieldname_to_tablename fieldname:string 

这不再起作用，并且在Rails 3中返回以下错误:

This no longer works and returns the following error in Rails 3:

红宝石:没有这样的文件或目录-脚本/生成(LoadError)

ruby: No such file or directory -- script/generate (LoadError)

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