根据关系中最新模型的列过滤范围,然后根据父模型的列过滤范围

Filtering ranges based on a column from latest model in relationship, then a column from a parent model

我有两个表:auctionsbids。在 auctions 中,我有一个 start_amount 字段,在 bidsamount 中。两个表还有 created_atmodified_at 时间戳列。我希望能够检索与特定范围内的最高(或最新,无论您如何看待)出价相匹配的拍卖列表。

过去一周我一直在努力,只成功地根据 所有 出价而不是最新(或最低)出价(start_amount 包括。)我将如何实现我正在寻找的东西?

我试过的代码:

if (request()->has('bid_range'))
    $auctions->with(['bids' => function ($query) use ($bid_min, $bid_max) {
        $query->whereBetween('amount', [$bid_min, $bid_max])->orWhereBetween('start_amount', [$bid_min, $bid_max])->orderBy('created_at', 'desc')->get();
    }]);

如果我错了请纠正我,但你可能正在尝试这样做:

select *
from auctions
where exists 
    (select 1 
    from bids 
    where amount > 10 and amount < 20
    and bids.auctions_id = auction.id)

因此,Laravel 方式:

DB::table('auctions')
        ->whereExists(function ($query) use ($bid_min, $bid_max) {
            $query->from('bids')
                  ->whereRaw("'amount' > $bid_min and 'amount' < $bid_max")
                  ->whereRaw('bids.auctions_id = auction.id');
        })
        ->get();

这就是你想要的?