CODEWITHSUNDEEP
ruby-on-railsruby
codyc4321
codyc4321

Reputation: 9682

making migration by hand ruby on rails 4

I have been learning rails, and am having an issue making a migration by hand. What I have done:

The filename is:

20150825194806_slug_unique_vacations.rb

which I made up. I tried cutting and pasting a migration and I named the class based on what I thought made sense:

class SlugUniqueIndex < ActiveRecord::Migration
  def change
    add_index :vacations, [:slug], :unique => true
  end
end

but I get this error:

cchilders@cody_pc:~/projects/rails_projects/vacation$ rake db:migrate
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

uninitialized constant SlugUniqueVacations
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

What is the correct way to migrate where you only want to make a single field that already exists in a table unique?

Upvotes: 0

Views: 44

Answers (1)

Tauhidul Islam
Tauhidul Islam

Reputation: 376

Migration file name and class name must be same.

class SlugUniqueVacations < ActiveRecord::Migration
  def change
    add_index :vacations, [:slug], :unique => true
  end
end

Upvotes: 4

Related Questions