Migration example to rename column

rename_table_column.rb

# It's recommended to change the class and filename to be a little more descriptive for your environment

class RenameTableColumn < ActiveRecord::Migration
  def up
    rename_column :table_name, :producthistory_id, :product_history_id
  end

  def down
    rename_column :table_name, :product_history_id, :producthistory_id
  end
end