laravel5+复杂原生sql编写多条件查询定位经纬度距离排序及paginate分页

描述：laravel链式操作虽然方便那是针对普通业务，稍微复杂点的我感觉还是原生sql来的实在

话不多说分享一下一个案例：

多条件查询，定位经纬度计算距离附近排序，分页

$where = request()->input();
if (!isset($where['lng']) || !isset($where['lat'])) {return '未传经纬度';}
try {
$sql = "SELECT
  lara_90_cbb_palmlife.id,
  lara_90_cbb_palmlife.tid,
  lara_90_cbb_palmlife.city,
  lara_90_cbb_palmlife.area,
  lara_90_cbb_palmlife.business,
  lara_90_cbb_palmlife.type_name,
  lara_90_cbb_palmlife.img,
  lara_90_cbb_palmlife.title,
  lara_90_cbb_palmlife.lat,
  lara_90_cbb_palmlife.lng,
  lara_90_cbb_palmlife.youhui,
  round(st_distance_sphere(point(lara_90_cbb_palmlife.lng,lara_90_cbb_palmlife.lat),point({$where['lng']},{$where['lat']}))/1000,2) as space
FROM
  `lara_90_cbb_palmlife`
  LEFT JOIN `lara_92_cbb_palmlife_coupon_relation` ON `lara_90_cbb_palmlife`.`tid` = `lara_92_cbb_palmlife_coupon_relation`.`palmlife_id`
  LEFT JOIN `lara_91_cbb_palmlife_coupon` ON `lara_91_cbb_palmlife_coupon`.`cid` = `lara_92_cbb_palmlife_coupon_relation`.`palmlife_coupon_id`
WHERE ";

	  if (isset($where['city'])) {
		  $sql .= "city = '{$where['city']}'";
	  }
	  if (isset($where['area'])) {
		  $sql .= " and area = '{$where['area']}'";
	  }
	  if (isset($where['business'])) {
		  $sql .= " and business = '{$where['business']}'";
	  }
	  if (isset($where['type'])) {
		  $sql .= " and type_name = '{$where['type']}'";
	  }
	  if (isset($where['bank'])) {
		  $sql .= " and lara_90_cbb_palmlife.bank = {$where['bank']}";
	  }
	  if (isset($where['bank'])) {//查优惠表
		  $sql .= " and (lara_91_cbb_palmlife_coupon.bank = {$where['bank']} or lara_91_cbb_palmlife_coupon.bank is NULL)";
	  }
	  if (isset($where['week'])) {//查优惠表
		  $sql .= " and (youhui LIKE '%周一至周日%' OR lara_91_cbb_palmlife_coupon.title LIKE '%{$where['week']}%' )";
	  }
	  if (isset($where['kw'])) {
		  $sql .= " and lara_90_cbb_palmlife.title like '%{$where['kw']}%'";
	  }

	  $sql .= "GROUP BY lara_90_cbb_palmlife.tid";
	  if (isset($where['space'])) {//1000千米内距离排序  根据定位跟经纬度计算距离
		  $sql .= " HAVING space < {$where['space']} ORDER BY space ASC , lara_90_cbb_palmlife.id" ;
	  }else{
		  $sql .= " ORDER BY space ASC , lara_90_cbb_palmlife.id";
	  }
	  //$sql .= " LIMIT 100";
	  //$res = DB::select($sql);
	  $sql =  '('.$sql.') cc';//定义临时表

	  $res = DB::table(DB::raw($sql))->paginate(10);

  return response()->json(array('status' => 200, 'msg' => '成功', 'res' => $res));
} catch (Exception $e) {
	return response()->json(array('status' => 201, 'msg' => '失败'));
}