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monkey patch to add random_order to ActiveRecord with multi DB driver
# for rails 3 or higher
module ActiveRecord
module Querying
delegate :random_order, :to => :scoped
end
module QueryMethods
def random_order
relation = clone
name = connection.adapter_name
case name
when 'SQLite', 'PostgreSQL'
relation.order_values += ['random()']
when /Mysql/
relation.order_values += ['rand()']
else
raise "random_order doesn't support this adapter"
end
relation
end
end
end
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