Rails Migration with adding and removing reference

Question

After creating a migration file with rails generate migration AddClientToUser I can edit my migration file like so:

class AddClientToUser < ActiveRecord::Migration   def self.up     change_table :users do |t|       t.references :client     end   end    def self.down     change_table :users do |t|       t.remove :client_id     end   end end 

Is this the correct way to reverse the reference column added in the migration?

Answer 1

Rails 4.2.1

rails g migration RemoveClientFromUsers client:references 

Will generate a migration similar:

class RemoveClientFromUser < ActiveRecord::Migration   def change     remove_reference :users, :client, index: true, foreign_key: true   end end 

In addition, one is at liberty to add another or other reference(s) by adding:

add_reference :users, :model_name, index: true, foreign_key: true 

within the very change method. And finally running rake db:migrate after saving the changes to the migration, will produce the desired results.