Run a single migration file

Question

Is there an easy way to run a single migration? I don\'t want to migrate to a certain version I just want to run a specific one.

Answer 1

This are the steps to run again this migration file "20150927161307_create_users.rb"

1. Run the console mode. (rails c)

2. Copy and past the class which is in that file to the console.

   class CreateUsers < ActiveRecord::Migration
     def change
       create_table :users do |t|
         t.string :name
         t.string :email
         t.timestamps null: false   end
       end
     end
   end
   

3. Create an instance of the class CreateUsers: c1 = CreateUsers.new

4. Execute the method change of that instance: c1.change