Question

我希望下面的代码可以在每个33.3%旁边的评论中查找：

$ratings->where

数据库中只有一个评分为-1，其他值的计数结果为0。但是我在所有情况下都得到0。

让我思考的是，如果我改变第一个“喜欢”，其中-1而不是1，我得到的结果为1喜欢和“不喜欢”但是对于“not_sure”它仍为0。 / p>

我无法理解为什么会这样。

修改

数据库只包含一条记录

$ratings = VideoRating::where('video_id', '=', $video->id) ->where('created_at','>=', \Carbon\Carbon::createFromFormat('Y-m-d',$start_date))->where('created_at', '<=', \Carbon\Carbon::createFromFormat('Y-m-d',$end_date)); $data = [ "likes" => $ratings->where('rating','=',1)->get()->count(), //0 "dislikes" => $ratings->where('rating','=',-1)->get()->count(), //1 "not_sure" => $ratings->where('rating','=',0)->get()->count(), // 0 ];

我使用的日期为INSERT INTO "public"."video_ratings(id,user_id,video_id,rating,created_at, updated_at)" VALUES ('1', '2', '1', '-1', '2016-02-24 14:57:41', '2016-02-24 14:57:41');到01/02/2016，因此它在created_at期间内

编辑2

肯定它与变异29/02/2016变量有关。虽然我并不精通Eloquent以确切知道如何，但下面的代码按预期工作

$ratings

我不喜欢它，我宁愿以适当的方式重用初始对象$ratings = VideoRating::where('video_id', '=', $video->id) ->where('created_at', '>=', \Carbon\Carbon::createFromFormat('Y-m-d', $start_date)->toDateTimeString())->where('created_at', '<=', \Carbon\Carbon::createFromFormat('Y-m-d', $end_date)->toDateTimeString()); $ratings1 = VideoRating::where('video_id', '=', $video->id) ->where('created_at', '>=', \Carbon\Carbon::createFromFormat('Y-m-d', $start_date)->toDateTimeString())->where('created_at', '<=', \Carbon\Carbon::createFromFormat('Y-m-d', $end_date)->toDateTimeString()); $ratings2 = VideoRating::where('video_id', '=', $video->id) ->where('created_at', '>=', \Carbon\Carbon::createFromFormat('Y-m-d', $start_date)->toDateTimeString())->where('created_at', '<=', \Carbon\Carbon::createFromFormat('Y-m-d', $end_date)->toDateTimeString()); $data = [ "likes" => $ratings->where('rating', '=', 1)->get()->count(), "dislikes" => $ratings1->where('rating', '=', -1)->get()->count(), "not_sure" => $ratings2->where('rating', '=', 0)->get()->count(), ];

Answer 1

如果您需要来自同一基本查询的不同结果，则需要在执行get / count方法之前克隆它：

$likes = clone $ratings;
$dislikes = clone $ratings;
$not_sure = clone $ratings;

$data = [
    "likes"     => $likes->where('rating', 1)->count(),
    "dislikes"  => $dislikes->where('rating', -1)->count(),
    "not_sure"  => $not_sure->where('rating', 0)->count(),
];

Answer 2

由于PHP中实现对象的方式，可能会出现您的问题

尝试使用Eloquent中的查询范围：

修改您的VideoRating课程并添加以下方法

public function scopeFetchRatingsBetweenDatesForVideo($query, $videoID, $startDate, $endDate, $rating = null){
    $query->whereVideoId(videoID)
        ->whereRaw('DATE_FORMAT(`created_at`, "%Y-%m-%d") >= ?', [$startDate])
        ->whereRaw('DATE_FORMAT(`created_at`, "%Y-%m-%d") <= ?', [$endDate])

    if($rating != null){
        $query->whereRating($rating)
    }
    return $query
}

使用您的范围

如果您的输入开始日期和结束日期的格式为Y-md-d，则不应将它们翻译为Y-m-d H：i：s。一个选项是将它们用作Y-m-d并将created_at字段转换为Y-m-d。如果您的输入日期是Y-m-d H：i：我可以将输入日期与created_at字段进行比较。

 $startDate = \Carbon\Carbon::createFromFormat('Y-m-d',$start_date)->toDateString();
 $endDate = \Carbon\Carbon::createFromFormat('Y-m-d', $end_date)->toDateString();
 $data = [
    'likes' => VideoRating::fetchRatingsBetweenDatesForVideo($video->id, $startDate, $endDate, 1)->count(),
    'dislikes' => VideoRating::fetchRatingsBetweenDatesForVideo($video->id, $startDate, $endDate, -1)->count(),
    'not_sure' => VideoRating::fetchRatingsBetweenDatesForVideo($video->id, $startDate, $endDate, 0)->count(),
];

// or
$ratings = VideoRating::fetchRatingsBetweenDatesForVideo($video->id, $startDate, $endDate);
$data = [
    'likes' => (clone $ratings)->whereRating(1)->count(),
    'dislikes' => (clone $ratings)->whereRating(-1)->count(),
    'not_sure' => (clone $ratings)->whereRating(0)->count(),
];

Eloquent WHERE不会返回预期结果

2 个答案: