rails можно ли отредактировать код этой модели?

Я хотел бы объединить средства поиска лучше.

if params[:sort]
  if params[:sort] == 'industry_id'
    if params[:industry_id]
      @companies = Company.find_all_by_industry_id(params[:industry_id], :joins => "left join industries ind on industry_id = ind.id", :order => "ind.name" + " " + sort_direction)
    else
      @companies = Company.all(:joins => "left join industries ind on industry_id = ind.id", :order => "ind.name" +  " " + sort_direction)
    end
  else
    if params[:industry_id]
      @companies = Company.find_all_by_industry_id(params[:industry_id], :order => sort_column + " " + sort_direction)
    else
      @companies = Company.all(:order => sort_column + " " + sort_direction)
    end
  end
else
  if params[:industry_id]
    @companies = Company.find_all_by_industry_id(:joins => "left join industries ind on industry_id = ind.id", :order => "ind.name" + " " + sort_direction)
  else
    @companies = Company.all
  end
end