mysql - where('videos.created_at', '>', '2020.07.26 14:16:29') 不适用于左连接表 - Eloquent，Laravel

Question

大家。我已经编写了这段代码，它应该返回在指定日期之后发布的最喜欢的视频。但是代码返回比指定日期更早的结果。我在2020.07.26之后只发布了一个视频，尽管如此，Eloquent 还是返回了 8 个较旧的视频。

$query = Video::select('videos.id',DB::raw('group_concat(DISTINCT videos.code) AS code'),DB::raw('group_concat(DISTINCT videos.title) AS title'),DB::raw('group_concat(DISTINCT videos.created_at) AS createdDate'),DB::raw('count(reactions.id) AS reactCount'))
      ->leftJoin('reactions','reactions.at_video','=','videos.id')
      ->where('reactions.reaction',1)
      ->orWhereNull('reactions.reaction')
      ->where('videos.created_at', '>', '2020.07.26 14:16:29')
      ->groupBy('videos.id')
      ->orderBy('reactCount','DESC')
      ->get();

      dd($query);

然后我在解决方案所在的 stockflow 上找到了这段代码whereColumn。但这对我没有帮助。Laravel 向我展示了另一个错误。

stackoverflow 上另一篇文章中的whereColumn示例

$query = DB::table('messages')
    ->leftJoin('participants', function ($join) {
        $join->on('messages.thread_id', '=', 'participants.thread_id')
            ->on('messages.user_id', '!=', 'participants.user_id');
    })
    ->select('messages.created_at as message_date', 'participants.last_read as last_read')
    ->whereColumn('messages.created_at', '>', 'participants.last_read')->get();

这样做的原因是我对结果进行了分组。该videos.created字段返回值的次数与视频的次数一样多。为了解决这个问题，我使用了DISTINCT

DB::raw('group_concat(DISTINCT videos.created_at) AS createdDate')

然后我添加createdDate了WHERE()，不幸的是我又遇到了另一个错误。

->where('createdDate', '>', '2020.07.26 14:16:29')

这就是我的意思的错误。很多次我得到它......我几乎喜欢它;）

而且... 我编写了一个查询代码，它返回正确的结果并在本机 php 页面中运行。 这是 Laravel 应该做的，但它没有......

SELECT videos.id AS id, group_concat(videos.code) AS code, group_concat(videos.title) AS title, group_concat(DISTINCT videos.created_at) AS createdDate, count(reactions.id) AS reactCount
      FROM videos 
      LEFT JOIN reactions ON videos.id = reactions.at_video
      WHERE (reactions.reaction = 1 or reactions.reaction IS NULL)
      AND videos.created_at > '2020.07.27'
      GROUP BY videos.id
      ORDER BY reactCount DESC

我以为我会在 Laravel 中使用自定义查询代码作为最终解决方案，但我不得不再说一遍。

$videos = DB::select("SELECT videos.id AS id, group_concat(videos.code) AS code, group_concat(videos.title) AS title, group_concat(DISTINCT videos.created_at) AS createdDate, count(reactions.id) AS reactCount
      FROM videos 
      LEFT JOIN reactions ON videos.id = reactions.at_video
      WHERE (reactions.reaction = 1 or reactions.reaction IS NULL)
      AND videos.created_at > '2020.07.27'
      GROUP BY videos.id
      ORDER BY reactCount DESC")->paginate(16);

请有人帮我找到解决方案。我真的很累人。

score 0 · Accepted Answer

你试过使用whereDate()吗？

->whereDate('videos.created_at', '>', '2020.07.27');

或者，也许您应该使用 HasMany Relation 来获取反应计数。

$date = Carbon::createFromFormat('Y-m-d', '2020-07-27');

在视频模型中创建 HasMany 关系

public function reactions(){
    $this->hasMany(Reaction::class, 'at_video', 'id');
}

创建 Eloquent Query 以获取记录

Video::select('id', 'code', 'title')
      ->withCount('reactions')
      ->whereDate('videos.created_at', '>', $date)
      ->get();

score 0 · Accepted Answer

至少我找到了解决方案。这可能不是最好的方法，但它可以正常工作。

我将它们添加到我的控制器

use Illuminate\Pagination\Paginator;
use Illuminate\Database\Eloquent\Collection;

在函数中

$query = DB::select(DB::raw("SELECT videos.id AS id, group_concat(DISTINCT videos.code) AS code, group_concat(DISTINCT videos.title) AS title, group_concat(DISTINCT videos.created_at) AS createdDate, count(reactions.id) AS reactCount
FROM videos 
LEFT JOIN reactions ON videos.id = reactions.at_video
WHERE (reactions.reaction = 1 or reactions.reaction IS NULL)
AND videos.created_at > '2021.07.27'
GROUP BY videos.id
ORDER BY reactCount DESC"));
    
// Added this three lines of code to make as the results array as a collection
$collection = new Collection($query);
$page = $request->get('page') ? (int)$request->get('page') : 1;
$videos = $collection->forPage($page, 16); 

dd($videos);

mysql - where('videos.created_at', '>', '2020.07.26 14:16:29') 不适用于左连接表 - Eloquent，Laravel

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