Question

我的查询有问题。我想创建一个子查询，但它不会返回结果。

这是我的代码：

[System.Diagnostics.FileVersionInfo]::GetVersionInfo("d:\home\site\wwwroot\bin\System.Web.Mvc.dll").FileVersion

PostgreSQL等价物：

        $distance_representations = Representation::select('id')
        ->where(DB::raw('round(6371 * acos(cos(radians(45.0)) * cos(radians(latitude)) * cos(radians(longitude) - radians(2.7)) + sin(radians(45.0)) * sin(radians(latitude)))::numeric, 1) < 50'))
        ->limit(10)
        ->get();

    $representations = Representation::select('id', 'city', DB::raw('round(6371 * acos(cos(radians(45.0)) * cos(radians(latitude)) * cos(radians(longitude) - radians(2.7)) + sin(radians(45.0)) * sin(radians(latitude)))::numeric, 1) < 50'))
        ->whereIn('id', $distance_representations)
        ->get();

    return view('search', array('representations' => $representations));

谢谢

Answer 1

也许你可以试试这个

    $distance_representations = Representation::find('id')
    ->where(DB::raw('round(6371 * acos(cos(radians(45.0)) * cos(radians(latitude)) * cos(radians(longitude) - radians(2.7)) + sin(radians(45.0)) * sin(radians(latitude)))::numeric, 1) < 50'))
    ->limit(10)
    ->get();

    $representations = Representation::all()
    ->where(DB::raw('round(6371 * acos(cos(radians(45.0)) * cos(radians(latitude)) * cos(radians(longitude) - radians(2.7)) + sin(radians(45.0)) * sin(radians(latitude)))::numeric, 1) < 50'))
    ->whereIn('id', $distance_representations.id)
    ->get();

希望这会对你有所帮助。

Answer 2

我不明白为什么你需要子查询？除非我遗漏了某些内容，否则您应该能够使用单个查询选择数据。

@{ .... }

Answer 3

我找到了解决方案。我无法做得更好。谢谢。

此解决方案工作！

$representations_with_distance = Representation::select('id', 'city', DB::raw('round(6371 * acos(cos(radians(?)) * cos(radians(latitude)) * cos(radians(longitude) - radians(?)) + sin(radians(?)) * sin(radians(latitude)))::numeric, 1) as distance'));

$representation = DB::table(DB::raw("({$representations_with_distance->toSql()}) as rd"))
    ->where('distance', '<', '?')
    ->orderBy('distance')
    ->offset(0)
    ->limit(10)
    ->setBindings([$latitude, $longitude, $latitude,  $radius])
    ->get();

return view('search', array('representations' => $representation));

Laravel子查询whereIn

3 个答案: