我已经使用laravel大约4年了，但现在我正面临着我最大的挑战。我正在重构和扩展旧的PHP应用程序，用于映射我工作的办公室。有一个巨大的SQL查询，我需要以某种方式集成到Laravel的QueryBuilder中以提供一个急切的加载关系。
流程是这样的
Building => hasMany: Floor => hasMany: Seat => hasMany: BookedSeat => belongsTo: User
其中Building，Floor，Seat和BookedSeat是Eloquent模型。
我的巨大查询根据许多其他条件从BookedSeat选择当前日期的Seat预订，例如预订座位的人是在家庭办公室，度假等（这些存储在其他一些表中）并设置属性BookedSeat实例称为Status，以了解是否在当天采取了Seat
现在我正在尝试将这个原始查询集成到构建一个JSON层次结构中，然后我将其发送到在前端运行的Vue.js应用程序。
层次结构类似于：
{
"buildings": [
{
// properties
"floors" : [
{
//properties
"seats": [
{
//properties
"booked": [
{
"user": "some user model",
"Status": "some booked status"
}
]
},
// other seats
]
},
// other floors
]
},
//other buildings
]
}
巨大的查询返回一个对象数组，然后我可以使用它来水合BookedSeat集合，但我不知道我怎么可以使用这个集合或直接使用巨大的查询，以便为每个BookedSeat急切加载每个Seat的Floor为每个Building，让框架为我做繁重的工作。
我尝试的是构建如下方法：
public static function bookedSeatsForFloor(Relation $seatQuery, Relation $bookedQuery, Carbon $forDate)
{
$format = $forDate->format('Y-m-d H:m:i');
$bindings = $seatQuery->getBindings();
/** @var AvailableSeatsQuerySimple $availableSeats */
$availableSeats = new AvailableSeatsQuerySimple($bindings, $format); // bindings are my floor id's and I'm feeding them to my big query in order to have control over which floors to load depending on the user's rights
return DB::raw($availableSeats->getRawQuery());
}
并称之为：
Floor::where('id', $someId)->with(['seats' => static function ($seatQuery) use ($_that) {
/**
* Add to each seat the manager and the active booking
*/
$seatQuery->with(['booked' => static function ($bookedQuery) use ($seatQuery, $_that) {
return self::bookedSeatsForFloor($seatQuery, $bookedQuery, $_that->forDate);
}, 'manager'])->orderBy('seat_cir');
}]);
但我需要以某种方式用$bookedQuery或bookedSeatsForFloor修改$bookedQuery->select('something')方法中的$bookedQuery->setQuery('some query builder instance')，但我不知道如何将巨大的查询转换为Builder实例。
谢谢！
PS：由于复杂性，我最好想跳过将大量查询重写成雄辩的语法
增加细节：
因此，根据要求，这是我的原始查询，其中我更改了每个公司策略的一些数据库/表名称
SET NOCOUNT ON;
DECLARE
@the_date DATETIME;
SET @the_date = (SELECT CONVERT(DATETIME, ?, 120));
SELECT seat_identifier,
user_id,
FromDate,
ToDate,
Status
FROM (
SELECT d.seat_identifier,
d.user_id,
d.FromDate,
d.ToDate,
CASE
WHEN d.Status IS NULL
THEN 0
WHEN d.Status = 2
THEN 2
WHEN d.Status != 0
THEN CASE
WHEN -- New, OnGoing Request in Main_DB_Name
ho.status = 1 -- New StatusType in Main_DB_Name
OR
ho.status = 4 -- Pending StatusType in Main_DB_Name
OR
twl.status = 1 -- New StatusType in Main_DB_Name
OR
twl.status = 4 -- Pending StatusType in Main_DB_Name
OR
li.status = 1 -- New StatusType in Main_DB_Name
OR
li.status = 4 -- Pending StatusType in Main_DB_Name
OR
ctaf.status = 1 -- New StatusType2 in Main_DB_Name
OR
ctaf.status = 2 -- Ongoing StatusType2 in Main_DB_Name
THEN
2 --> Pending seat in MyApplication
WHEN -- Approved Request in Main_DB_Name
ho.status = 2
OR
twl.status = 2
OR
li.status = 1
OR
li.status = 2
OR
ctaf.status = 1
OR
ctaf.status = 2
THEN 0 -- Free Seat MyApplication
ELSE 1 -- Taken Seat MyApplication
END
END as 'Status'
FROM (
SELECT seats.seat_identifier as seat_identifier,
c.user_id,
c.FromDate,
c.ToDate,
c.Status
FROM (
SELECT fo_bs.seat_identifier,
fo_bs.user_id,
fo_bs.FromDate,
fo_bs.ToDate,
fo_bs.Status
FROM MyApplication.another_schema.BookedSeats fo_bs
INNER JOIN MyApplication.another_schema.seats AS seats ON fo_bs.seat_identifier = seats.seat_identifier
WHERE fo_bs.FromDate <= @the_date
AND fo_bs.ToDate >= @the_date
AND fo_bs.Status IN (1, 2)
AND seats.floor_id IN (###FLOOR_IDS###) -- will replace this from php with a list of "?,?,?" depending on how many floor_ids are in the query bindings
) c
INNER JOIN MyApplication.another_schema.seats AS seats ON c.seat_identifier = seats.seat_identifier) d
LEFT JOIN (SELECT requester, status
from Main_DB_Name.schema.HOME_OFFICE
WHERE Main_DB_Name.schema.HOME_OFFICE.from_date <= @the_date
and Main_DB_Name.schema.HOME_OFFICE.to_date >= @the_date) ho ON d.user_id = ho.requester
LEFT JOIN (SELECT requester, status
from Main_DB_Name.schema.TEMPORARY_WORK_LOCATION
WHERE Main_DB_Name.schema.TEMPORARY_WORK_LOCATION.from_date <= @the_date
and Main_DB_Name.schema.TEMPORARY_WORK_LOCATION.to_date >= @the_date) twl
ON d.user_id = twl.requester
LEFT JOIN (SELECT employee, status
from Main_DB_Name.schema.LEAVE_INVOIRE
WHERE Main_DB_Name.schema.LEAVE_INVOIRE.leave_date = @the_date) li ON d.user_id = li.employee
LEFT JOIN (SELECT requester, status
from Main_DB_Name.schema.TRAVEL
WHERE Main_DB_Name.schema.TRAVEL.from_date <= @the_date
and Main_DB_Name.schema.TRAVEL.until_date >= @the_date) ctaf
ON d.user_id = ctaf.requester
) y
我的模型/关系如下：
class Building extends Model {
/* Properties */
public function floors()
{
return $this->hasMany(Floor::class);
}
}
class Floor extends Model {
/* Properties */
public function building()
{
return $this->belongsTo(Building::class);
}
public function seats()
{
return $this->hasMany(Seat::class);
}
}
class Seat extends Model {
/* Properties */
public function floor()
{
return $this->belongsTo(Floor::class);
}
public function booked()
{
return $this->hasMany(BookedSeat::class);
}
}
class BookedSeat extends Model {
/* Properties */
public function user()
{
return $this->belongsTo(User::class);
}
public function seat()
{
return $this->belongsTo(Seat::class);
}
}
这个问题非常困难。我一直坚持尝试不同的东西超过一个星期，但找不到任何好办法。
我最后使用@Jonas Staudenmeir的建议，通过手动映射我所有的嵌套关系，然后在我的booked模型实例上设置相应的Seat关系，该关系来自使用BookedSeat::hydrate()获得的集合，原始查询的结果作为参数。
$availableSeats = new AvailableSeatsQuerySimple($format);
// Map through all the Buildings
$this->template['buildings'] = $this->template['buildings']
->map(static function (Building $building) use ($availableSeats) {
// Map through all the Floors in a Building
$floors = $building->floors->map(static function (Floor $floor) use ($availableSeats) {
/** @var BookedSeat|Collection $booked */
$booked = $availableSeats->execute($floor->id); // execute the raw query and get the results
if(count($booked) > 0) {
// Map through all the Seats in a Floor
$seats = $floor->seats->map(static function (Seat $seat) use ($booked) {
// Select the BookedSeat for the corresponding Seat
/** @var BookedSeat $bookedSeatForRelation */
$bookedSeatForRelation = $booked->filter(static function (BookedSeat $bookedSeat) use ($seat) {
return $bookedSeat->seat_identifier === $seat->id;
})->first();
// Attach the BookedSeat to the Seat only if the Status IS NOT 0
if($bookedSeatForRelation !== null && $bookedSeatForRelation->Status !== 0) {
return $seat->setRelation('booked', $bookedSeatForRelation);
}
return $seat->setRelation('booked', null);
});
return $floor->setRelation('seats', $seats);
}
return $floor;
});
return $building->setRelation('floors', $floors);
});