如何在不迁移的情况下从rails控制台重命名列？

Question

I would like to rename a table column from the rails console without writing any migration.

how can I do that?

Answer 1

我选择从控制台运行它：

ActiveRecord::Base.connection.rename_column :tablename, :old_column_name, :new_column_name

Answer 2

rails dbconsole
ALTER TABLE name RENAME column TO column

Answer 3

1. you run in console: rails g migration ChangeColName

2. you edit the file db/migrate/"timestamp"_change_col_name.rb insert in def change -

    rename_column :tablename, :old_column_name, :new_column_name -save 

3. you run in console: rake db:migrate :-)