# File lib/active_record/inheritance.rb, line 98 def compute_type(type_name) if type_name.match(/^::/) # If the type is prefixed with a scope operator then we assume that # the type_name is an absolute reference. ActiveSupport::Dependencies.constantize(type_name) else # Build a list of candidates to search for candidates = [] name.scan(/::|$/) { candidates.unshift "#{$`}::#{type_name}" } candidates << type_name candidates.each do |candidate| begin constant = ActiveSupport::Dependencies.constantize(candidate) return constant if candidate == constant.to_s rescue NameError => e # We don't want to swallow NoMethodError < NameError errors raise e unless e.instance_of?(NameError) end end raise NameError, "uninitialized constant #{candidates.first}" end end