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Location: cafe-grader-web/db/migrate/20090416235658_add_common_ext_to_languages.rb

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                    db/migrate/20090416235658_add_common_ext_to_languages.rb
                
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      class AddCommonExtToLanguages < ActiveRecord::Migration

        def self.up

          # language.common_ext is a comma-separated list of common file

          # extensions.

          add_column :languages, :common_ext, :string

          # updating table information

          Language.reset_column_information

          common_ext = { 

            'c' => 'c',

            'cpp' => 'cpp,cc',

            'pas' => 'pas' 

          }

          Language.all.each do |lang|

            lang.common_ext = common_ext[lang.name]

            lang.save

          end

        end

        def self.down

          remove_column :languages, :common_ext

        end

      end

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				class AddCommonExtToLanguages < ActiveRecord::Migration
				def self.up
				# language.common_ext is a comma-separated list of common file
				# extensions.
				add_column :languages, :common_ext, :string

				# updating table information
				Language.reset_column_information
				common_ext = {
				'c' => 'c',
				'cpp' => 'cpp,cc',
				'pas' => 'pas'
				}
				Language.all.each do \|lang\|
				lang.common_ext = common_ext[lang.name]
				lang.save
				end
				end

				def self.down
				remove_column :languages, :common_ext
				end
				end