|
class AddUniqueIndexToParameter < ActiveRecord::Migration
|
|
def up
|
|
found = []
|
|
Parameter.find_each do |param|
|
|
new_param = {:name => param.name, :type => param.type, :reference_id => param.reference_id}
|
|
if found.include?(new_param)
|
|
param.destroy
|
|
else
|
|
found << new_param
|
|
end
|
|
end
|
|
|
|
add_index :parameters, [:type, :reference_id, :name], :unique => true
|
|
end
|
|
|
|
def down
|
|
# previous version, prior to #8366 and 20141112165600_add_type_to_parameter_index
|
|
remove_index :parameters, :column => [:reference_id, :name] if index_exists? :parameters, [:reference_id, :name], :unique => true
|
|
remove_index :parameters, :column => [:type, :reference_id, :name] if index_exists? :parameters, [:type, :reference_id, :name], :unique => true
|
|
end
|
|
end
|
