def search
    unless params[:order]
      params[:order] = 'created_at'
    end
    if params[:filename]
      filename =~ "%" +params[:filename] +"%"
    end
    cond = Caboose::EZ::Condition.new do
      if params[:filename]
        filename =~ "%" +params[:filename] +"%"
      end
      if params[:created_at_min]
        created_at > params[:created_at_min]
      end
      if params[:created_at_max]
        created_at > params[:created_at_max]
      end
    end

    if params[:location_min] and params[:location_max]
      cond << "wgs84location && 'BOX3D(" +params[:location_min] +", " +params[:location_max] +"'::box3d"
    end