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10 May '12, 8pm

#Data #Analysis A Fresh Cup - Home - #Seed #Data in #Rails 3 #rails3 #k9bay #rubyonrails

One of the perennial code smells in many Rails applications is the use of migrations as a way to carry seed data (data that needs to be added to the database on deployment). This doesn't work well because it's tough to maintain and doesn't play well with loading up the database from the schema file. Rails 3 now has a new answer to this : a file convention and a rake task. The file is db/seeds.rb and it can contain arbitrary Ruby code, but generally it will look something like this: [sourcecode language='ruby'] cities = City.create([{ :name => 'Chicago' }, { :name => 'Copenhagen' }]) Mayor.create(:name => 'Daley', :city => cities.first) [/sourcecode] This file then gets run by using the new db:seed rake task, or via rake db:setup which runs create, schema:load, and seed in succession. As with some other parts of Rails, this is the simplest thing that can possibly work. For ...

Full article: http://afreshcup.com/home/2009/5/11/seed-data-in-rails-3....

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