Laravel Eloquent Relationship AVG有

Question

我有與product表相關的store表，它有product.rating （int）1到5

我想找到平均產品評級為3星或任何基於我的帖子數據的商店

我的代碼

$store = new Store;
if ((int)$request->input('store-rating')>0) {
    $store->whereHas('product',function($query) use($request) {
        $rate = $request->input('product-rating');
        $query->where(DB::raw('AVG(rating)'),$rate);
    });
}
$store->with('product');
$thestore = $store->paginate(6);

return $thestore;

它總是返回所有數據，例如忽略我的POST store-rating值

這是我的模特

<?php

namespace App;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Scope;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Foundation\Auth\User as AuthUser;
use Illuminate\Support\Facades\Auth;
use App\ModelBuilder;

class Store extends AuthUser
{
    use SoftDeletes;

    protected $guarded = [];
    protected $dates = ['deleted_at'];

    public function product(){
        return $this->hasMany('App\Product');
    }


}

---

解

如下所述，我應該使用groupBy和havingRaw來使查詢工作，但事實證明這不是我在代碼中唯一的問題

我將代碼更改為：

$store = Store::with('session');
if ((int)$request->input('store-rating')>0) {
    $store->whereHas('product',function($query) use($request) {
        $rate = $request->input('product-rating');
        $query->groupBy('rating')->havingRaw('AVG(rating) = '.$rate);
    });
}
$thestore = $store->paginate(6);

return $thestore;

它似乎我不能使用$store = new Store; 開始我的模型查詢

希望這可以幫助別人。

Answer 1

嘗試使用havingRaw

$query->grouBy('rating')->havingRaw('AVG(rating) = '.$rate);

別忘了小組