mastodon/db/migrate/20161006213403_rails_settings_migration.rb

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# frozen_string_literal: true
class RailsSettingsMigration < ActiveRecord::Migration[5.0]
def self.up
create_table :settings do |t|
t.string :var, null: false
t.text :value
t.references :target, null: false, polymorphic: true, index: { name: 'index_settings_on_target_type_and_target_id' }
t.timestamps null: true
end
add_index :settings, [:target_type, :target_id, :var], unique: true
end
def self.down
drop_table :settings
end
end