在 Laravel 中预订时间段，带有设备库存查询
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【中文标题】在 Laravel 中预订时间段，带有设备库存查询【英文标题】：Booking Time slot, with Equipment Stock query, in Laravel 【发布时间】：2020-08-09 18:39:30 【问题描述】：这是一个对大家来说很有趣的。 我发现自己陷入了实施难题。
我正在 Laravel 中开发一个预订应用程序，它允许人们在特定时间为空间预订房间和设备。 可用设备的数量是有限的，因此库存数量必须与预订相关的时间段一起查询。
我认为我已经解决了这个问题，方法是遍历同时发生的“其他预订”并计算当前正在使用的项目 -> 然后检查是否有库存。
对于我 90% 的测试来说，这一切正常，但只是设法找到了一个不允许我这样做的错误。
$guitarheadcount = 0;
$guitarcabcount = 0;
$guitarcombocount = 0;
$bassheadcount = 0;
$basscabcount = 0;
$basscombocount = 0;
$drumkitcount = 0;
$cymbalscount = 0;
$otherbookings = Booking::where('Room_id', '!=', $bookinginfo->Room_id)
->where(function ($query) use ($begin, $end)
$query->where(function ($q) use ($begin, $end)
$q->where('Booking_start', '>=', $begin)
->where('Booking_start', '<', $end);
)->orWhere(function ($q) use ($begin, $end)
$q->where('Booking_start', '<=', $begin)
->where('Booking_end', '>', $end);
)->orWhere(function ($q) use ($begin, $end)
$q->where('Booking_end', '>', $begin)
->where('Booking_end', '<=', $end);
)->orWhere(function ($q) use ($begin, $end)
$q->where('Booking_start', '>=', $begin)
->where('Booking_end', '<=', $end);
);
)->get();
//'amounts' are attributes for Booking objects.
foreach($otherbookings as $other)
$guitarheadcount = $other->Equip->guitarheadamount + $guitarheadcount;
$guitarcabcount = $other->Equip->guitarcabamount + $guitarcabcount;
$guitarcombocount = $other->Equip->guitarcomboamount + $guitarcombocount;
$bassheadcount = $other->Equip->bassheadamount + $bassheadcount;
$basscabcount = $other->Equip->basscabamount + $basscabcount;
$basscombocount = $other->Equip->basscomboamount + $basscombocount;
$drumkitcount = $other->Equip->drumkitamount + $drumkitcount;
$cymbalscount = $other->Equip->cymbalsamount + $cymbalscount;
然后我使用单独的 if 语句来重定向如果计数最终大于库存中的数量。
一个实际的错误示例是：
库存有 2 套鼓组。 在下午 1 点到 2 点预订一个……然后在下午 2 点到 3 点在同一个房间预订另一个。两者都需要架子鼓。
如果我随后尝试在下午 1 点到 3 点在不同的空间进行预订，那么计数已经是 2，即使一组鼓再次免费（如果这有意义的话）。
我真的很难过。我无法想象是否需要：
继续“计数”，但生成的结果为与另一个在同一个房间中的每个项目减去 1 (?)。 我是否应该完全取消计数并为每个设备项目编写单独的查询...以及我将如何做到这一点！任何帮助都将不胜感激。
【问题讨论】：
不确定，但请考虑一下。如果 1-2 需要一个架子鼓，2-3 需要另一个架子鼓。从计算机的角度来看，2h00m00s000000ms 具有精确值。换句话说。一微秒内，需要 2 个架子鼓。这将导致您的查询计数 2。使用Illuminate\Support\Carbon 从 $end 中减去 1 秒，然后再次检查。
感谢 Dimitri 回到我身边。我会试一试，看看它是否有帮助。我已经解决了，我可以将之前的 $order info 保存为在 for each 循环之前定义的数组。这样我就可以引用之前的 $order，而当前的订单正在被迭代。我也意识到... Room1 有 1:2pm + 1 个鼓。房间 2 有 2-3pm + 1 鼓。下午 1 点至 3 点预订 -> 房间 3 + 1 鼓。应该没问题。
【参考方案1】：
我将对此进行进一步测试，但我想我可能已经提出了解决方案。
我已经拥有的：
一种在选定时间范围内获取所有冲突预订的机制。 它可以提供集合中包含的所有项目的计数。 它不“知道”的是在预订过程中，库存是否会用完。
解决方案（到目前为止，早期测试正在发挥作用）。
我使用 orderBy 将原始查询结果按开始时间排序。
我使用了一个 foreach 来遍历它们。
我在循环之外定义了几个数组，我可以使用它们将先前循环的属性传递回下一个循环。如果没有发现计数错误，则在最后覆盖。
然后我创建了一些 if 语句来检查下一个预订与前一个预订。
如果下一次开始是在上一次结束之前，我创建了另一个数组来传递当前值，然后在 if 中为每个数组开始另一个数组，然后重新计算该时间范围内的所有预订。然后，如果计数再次超出该时间内的可用库存，它将爆发并重定向。
当该循环结束时，我们继续前一个循环。
为意大利面条代码道歉。
$first = $otherbookings->first();
if ($first == null)
else
$previous = [];
$previous ['id'] = $first->id;
$previous ['Booking_end'] = $first->Booking_end;
$tempdrumkitcount = 0;
foreach($otherbookings as $other)
if($previous ['id'] == $other->id)
$drumkitcount = (int)$first->Equip->drumkitamount;
//check
if(($currenthireprices->drumkitstock - ($other->drumkitamount + $drumkitcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Check 1 error");
else
if($previous ['Booking_end'] > $other->Booking_start)
$current ['id'] = $other->id;
$current ['Booking_start'] = $other->Booking_start;
$current ['Booking_end'] = $other->Booking_end;
foreach($otherbookings as $newother)
if($newother->id != $current ['id'])
if(($newother->Booking_start < $current ['Booking_start']) && ($newother->Booking_end > $current ['Booking_start'] ))
$tempdrumkitcount = $tempdrumkitcount + $newother->Equip->drumkitamount;
if(($newother->Booking_start > $current ['Booking_start']) && ($newother->Booking_end < $current ['Booking_end'] ))
$tempdrumkitcount = $tempdrumkitcount + $newother->Equip->drumkitamount;
if(($currenthireprices->drumkitstock - ($drumkitamount + $tempdrumkitcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $drumkitamount 'Drum kits' available between $timestart and $timeend to complete your booking. (Error- 100 [Cummalative Check]).");
$drumkitcount = $other->Equip->drumkitamount + $drumkitcount;
if(($currenthireprices->drumkitstock - ($drumkitamount + $drumkitcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $drumkitamount 'Drum kits' available between $timestart and $timeend to complete your booking. (Error- 150 [Non-Cummalative Check]).");
$drumkitcount = $drumkitcount - $previous ['drumkitamount'];
if($previous ['Booking_end'] <= $other->Booking_start)
$drumkitcount = $drumkitcount - $previous ['drumkitamount'];
$drumkitcount = $drumkitcount + $other->Equip->drumkitamount;
if(($currenthireprices->drumkitstock - ($drumkitamount + $drumkitcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $drumkitamount 'Drum kits' available between $timestart and $timeend to complete your booking. (Error- 200 [Non-overlap main check]).");
$previous ['id'] = $other->id;
$previous ['Booking_end'] = $other->Booking_end;
$previous ['drumkitamount'] = $other->Equip->drumkitamount;
【讨论】：
【参考方案2】：虽然我之前回答中的方法看起来很有希望……但随着库存量和相邻预订量的增加，它开始出现无法修复的计数错误。
我重新考虑并设计了一个更好的解决方案。无论如何，用户只能预订至少 30 分钟的时段。
因此，使用 do/while 循环，对于用户选择的时间段每增加 30 分钟，它就会进行一次库存检查。
我确定锤击服务器不是很好，但至少在预订期间会有固定的时间对其进行查询。
///STOCK CHECK
$stockcheckbegin = $begin;
$stockcheckend = date("Y-m-d H:i", strtotime('+30 minutes',strtotime($begin)));
$tempguitarheadcount = 0;
$tempguitarcabcount = 0;
$tempguitarcombocount = 0;
$tempbassheadcount = 0;
$tempbasscabcount = 0;
$tempbasscombocount = 0;
$tempdrumkitcount = 0;
$tempcymbalscount = 0;
do
$otherbookings = Booking::orderby('Booking_start', 'ASC')
->where(function ($query) use ($stockcheckbegin, $stockcheckend)
$query->where(function ($q) use ($stockcheckbegin, $stockcheckend)
$q->where('Booking_start', '>=', $stockcheckbegin)
->where('Booking_start', '<', $stockcheckend);
)->orWhere(function ($q) use ($stockcheckbegin, $stockcheckend)
$q->where('Booking_start', '<=', $stockcheckbegin)
->where('Booking_end', '>', $stockcheckend);
)->orWhere(function ($q) use ($stockcheckbegin, $stockcheckend)
$q->where('Booking_end', '>', $stockcheckbegin)
->where('Booking_end', '<=', $stockcheckend);
)->orWhere(function ($q) use ($stockcheckbegin, $stockcheckend)
$q->where('Booking_start', '>=', $stockcheckbegin)
->where('Booking_end', '<=', $stockcheckend);
);
)->get();
foreach($otherbookings as $other)
$tempguitarheadcount = $tempguitarheadcount + $other->Equip->guitarheadamount;
$tempguitarcabcount = $tempguitarcabcount + $other->Equip->guitarcabamount;
$tempguitarcombocount = $tempguitarcombocount + $other->Equip->guitarcomboamount;
$tempbassheadcount = $tempbassheadcount + $other->Equip->bassheadamount;
$tempbasscabcount = $tempbasscabcount + $other->Equip->basscabamount;
$tempbasscombocount = $tempbasscombocount + $other->Equip->basscomboamount;
$tempdrumkitcount = $tempdrumkitcount + $other->Equip->drumkitamount;
$tempcymbalscount = $tempcymbalscount + $other->Equip->cymbalsamount;
if(($currenthireprices->guitarheadstock - ($guitarheadamount + $tempguitarheadcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Sorry! Our 'Guitar Head' stock will run out during the course of this booking. (Between $stockcheckbegin and $stockcheckend)");
if(($currenthireprices->guitarcabstock - ($guitarcabamount + $tempguitarcabcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Sorry! Our 'Guitar Cab' stock will run out during the course of this booking. (Between $stockcheckbegin and $stockcheckend)");
if(($currenthireprices->guitarcombostock - ($guitarcomboamount + $tempguitarcombocount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Sorry! Our 'Guitar Combo' stock will run out during the course of this booking. (Between $stockcheckbegin and $stockcheckend)");
if(($currenthireprices->bassheadstock - ($bassheadamount + $tempbassheadcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Sorry! Our 'Bass Head' stock will run out during the course of this booking. (Between $stockcheckbegin and $stockcheckend)");
if(($currenthireprices->basscabstock - ($basscabamount + $tempbasscabcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Sorry! Our 'Bass Cab' stock will run out during the course of this booking. (Between $stockcheckbegin and $stockcheckend)");
if(($currenthireprices->basscombostock - ($basscomboamount + $tempbasscombocount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Sorry! Our 'Bass Combo' stock will run out during the course of this booking. (Between $stockcheckbegin and $stockcheckend)");
if(($currenthireprices->drumkitstock - ($drumkitamount + $tempdrumkitcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Sorry! Our 'Drum kit' stock will run out during the course of this booking. (Between $stockcheckbegin and $stockcheckend)");
if(($currenthireprices->cymbalsstock - ($cymbalsamount + $tempcymbalscount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Sorry! Our sets of 'Cymbals' stock will run out during the course of this booking. (Between $stockcheckbegin and $stockcheckend)");
$tempguitarheadcount = 0;
$tempguitarcabcount = 0;
$tempguitarcombocount = 0;
$tempbassheadcount = 0;
$tempbasscabcount = 0;
$tempbasscombocount = 0;
$tempdrumkitcount = 0;
$tempcymbalscount = 0;
$stockcheckbegin = date("Y-m-d H:i", strtotime('+30 minutes',strtotime($stockcheckbegin)));
$stockcheckend = date("Y-m-d H:i", strtotime('+30 minutes',strtotime($stockcheckend)));
while ($stockcheckbegin != $end);
if(($currenthireprices->guitarheadstock - ($guitarheadamount + $guitarheadcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $guitarheadamount guitar heads available between $timestart and $timeend. There's $currenthireprices->guitarheadstock in stock and $guitarheadcount in use.");
if(($currenthireprices->guitarcabstock - ($guitarcabamount + $guitarcabcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $guitarcabamount 'Guitar cabs' available between $timestart and $timeend. There's $currenthireprices->guitarcabstock in stock and $guitarcabcount in use.");
if(($currenthireprices->guitarcombostock - ($guitarcomboamount + $guitarcombocount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $guitarcomboamount 'Guitar combos' available between $timestart and $timeend. There's $currenthireprices->guitarcombostock in stock and $guitarcombocount in use.");
if(($currenthireprices->bassheadstock - ($bassheadamount + $bassheadcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $bassheadamount 'Bass heads' available between $timestart and $timeend. There's $currenthireprices->bassheadstock in stock and $bassheadcount in use.");
if(($currenthireprices->basscabstock - ($basscabamount + $basscabcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $basscabamount 'Bass cabs' available between $timestart and $timeend. There's $currenthireprices->basscabstock in stock and $basscabcount in use.");
if(($currenthireprices->basscombostock - ($basscomboamount + $basscombocount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $basscomboamount 'Bass combos' available between $timestart and $timeend. There's $currenthireprices->basscombostock in stock and $basscombocount in use.");
if(($currenthireprices->drumkitstock - ($drumkitamount + $drumkitcount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $drumkitamount 'Drum kits' available between $timestart and $timeend. There's $currenthireprices->drumkitstock in stock and $drumkitcount in use.");
if(($currenthireprices->cymbalsstock - ($cymbalsamount + $cymbalscount)) < 0)
return redirect()->back()->withInput()->with('Booking_query_error', "Unfortunatly there aren't $cymbalsamount 'sets of cymbals' available between $timestart and $timeend. There's $currenthireprices->cymbalsstock in stock and $cymbalscount in use.");
//----- END OF STOCK CHECK
【讨论】：
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