How to Rename a Column in Ruby on Rails

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The Ruby on Rails framework has some helpful shorthand methods for when you want to change the structure of your database. If you want to rename a column, you can create a migration with the terminal command:

rails g migration change_some_name

And then the code in the migration file should look something like this:

class ChangeSomeName < ActiveRecord::Migration[6.0]
  def change
    rename_column :table_name, :old_name, :new_name
  end
end

After you run: rails db:migrate, the new name will be updated in the database. A few things to keep in mind:

Make sure to update any/all mentions of the old name in the: strong params, serializers, seed files, show templates, etc. Ensure that the table name you're using matches the table name as it appears in the db/schema.rb file

For more information on rails migrations, the guide below is very helpful.