Laravel计算相关列的平均值
我试图计算相关栏目的平均评分。商户和客户反馈评论模型之间的关系(1->多个) 商户模式Laravel计算相关列的平均值,laravel,eloquent,laravel-5.4,laravel-eloquent,laravel-query-builder,Laravel,Eloquent,Laravel 5.4,Laravel Eloquent,Laravel Query Builder,我试图计算相关栏目的平均评分。商户和客户反馈评论模型之间的关系(1->多个) 商户模式 [Merchant Model] :::::::::::::::::::::::::::: public function clientFeedbacks() { return $this->hasMany('App\ClientFeedbackReviews'); //, 'merchant_id', 'id'); 客户反馈评论 :::::::::::::::::::::::::::::
[Merchant Model]
::::::::::::::::::::::::::::
public function clientFeedbacks() {
return $this->hasMany('App\ClientFeedbackReviews'); //, 'merchant_id', 'id');
客户反馈评论
:::::::::::::::::::::::::::::::::::::::
class ClientFeedbackReviews extends Model {
protected $table = 'client_feedback_merchants';
public function forMerchant() {
return $this->belongsTo('App\Merchant', 'merchant_id', 'id');
}
public function byClient() {
return $this->belongsTo('App\Clients', 'client_id', 'id');
}
:::::::::::::::::::::::::::::::::::::
我需要获得所有商户的平均评分(作为查询的一部分,我根据附近距离、给定位置或使用搜索字符串(取决于请求数据)计算商户的结果)
我在网上找到的几乎所有东西都试过了,但都无法从结果中获得“平均评分”的关键值
以下是我尝试过的众多解决方案之一,并粘贴在此处作为示例
/////// query continued //////////
$getMerchantQuery = $getMerchantQuery->with(['clientFeedbacks' => function($query) {
$query->select(DB::raw('AVG( stars) AS average_rating'));
}]);
/////// query continued //////////
这就是我得到的总是空的客户反馈数组,而我想要的是平均评分
{
"id": 1,
"user_id": 2,
"company_name": "Best Salon",
"primary_contact": "111111111",
"company_st_address": "Office # 62",
"company_location": "Abc",
"company_city": null,
"company_state": null,
"company_country": null,
"company_zip": null,
"company_lat": "27.9506",
"company_long": "82.4572",
"logo_image": "449cbdf0-12ba-11e7-bc65-b7fa1731e4d5.jpeg",
"is_fav_by_client_count": 3,
"client_feedbacks_count": 1,
"user_details": {
"id": 2,
"email": "client@lir.com"
},
"client_feedbacks": []
}
我们必须选择哪些选项来计算相关表格的平均值
================编辑
但是,这会返回结果,但不确定如何获得客户机_反馈键中的平均值
$getMerchantQuery = $getMerchantQuery->with('clientFeedbacks');
作为
}好的。因此,这项工作如下所述: 我使用它的方式如下:
//////// query continued /////////
$getMerchantQuery = $getMerchantQuery->with('avgFeedback');
/////// query continued //////////
已经快三天了,还没有答复。。。
public function avgFeedback() {
return $this->hasMany('App\ClientFeedbackReviews', 'merchant_id', 'id')
->selectRaw('merchant_id,AVG(client_feedback_merchants.stars) AS average_rating')
->groupBy('merchant_id');
}
public function getavgFeedbackAttribute() {
// if relation is not loaded already, let's do it first
if ($this->relationLoaded('commentsCount'))
$this->load('avgFeedback');
$related = $this->getRelation('avgFeedback');
// then return the count directly
return ($related) ? (int) $related->average_rating : 0;
}
//////// query continued /////////
$getMerchantQuery = $getMerchantQuery->with('avgFeedback');
/////// query continued //////////