class Ransack::Search

def build(params)
  collapse_multiparameter_attributes!(params).each do |key, value|
    if ['s'.freeze, 'sorts'.freeze].freeze.include?(key)
      send("#{key}=", value)
    elsif @context.ransackable_scope?(key, @context.object)
      add_scope(key, value)
    elsif base.attribute_method?(key)
      base.send("#{key}=", value)
    elsif !Ransack.options[:ignore_unknown_conditions] || !@ignore_unknown_conditions
      raise ArgumentError, "Invalid search term #{key}"
    end
  end
  self
end