根据 whereHas 查询获取最高和最低数据

Question

基于 apartment finder 所有 types 其中有 apartments，基于表单搜索正在 shown/returned。这是使用 whereHas 查询完成的。

例如：

A user has different choices; a garden/balcony, price range, floor etc.

The query is being run based on these choices, and if there are apartments which meet the search requirements the parent of these apartments (type) are being returned.

最终我想显示一个类型的living surface范围(lowest-highest)，但是每个apartment的living surface是不同的。

让 highest 和 lowest apartment.living_surface 被 whereHas 返回的最有效方法是什么.

$types = Type::where('type', '=', 'studio')->whereHas('apartments', function ($query) use ($request) {
    if ($request->view == 'garden') {
        $query->where('view', '=', $request->view);
    } elseif ($request->view == 'balcony') {
        $query->where('view', '=', $request->view);
    } elseif ($request->view == 'other') {
        $query->where('view', '=', $request->view);
    }

    if ($request->floor == 'upper') {
        $query->where('floor', '<', '5');
    } elseif ($request->floor == 'lower') {
        $query->where('floor', '>', '4');
    }

    if ($request->sun == 'morning') {
        $query->where('sun', '=', 'morning');
    } elseif ($request->sun == 'evening') {
        $query->where('sun', '=', 'evening');
    }

    if ($request->price == '1') {
        $query->where('price', '<', '900');
    } elseif ($request->price == '2') {
        $query->where('price', '<', '999');
    } elseif ($request->price == '3') {
        $query->where('price', '>', '999');
    }
})->with('apartments')->get();

一个解决方案（我认为）是提取 apartments 的所有 ids 和运行另一个基于 ids 的查询，但这不会由于运行对某事（我希望）的多个查询要在一个查询中完成，因此实际上并没有尽可能优化。

Answer 1

这可以通过 Collection Methods - Laravel Docs

可以对查询的集合使用运行方法 - 在本例中 $types

foreach ($types as $type) {
    $type->lowest_living_area = $type->apartments>sortBy('living_area')->first()->living_area);
    $type->highest_living_area = $type->apartments->sortBy('living_area')->last()->living_area);
}

根据 whereHas 查询获取最高和最低数据

Get highest & lowest data based on a whereHas query

mysql

sql

laravel

laravel-5.3