Php 查询：颜色、大小等可自定义变量的产品数量

我想从stock_reports表中制作一份报告，在该表中，我想用颜色、大小等变量显示每个产品的数量，这些变量基于每个批次创建的_。我使用了以下查询，但我需要一些改进

$stockReport = DB::table('products')
        ->rightjoin('stock_reports','stock_reports.product_id','products.id')
         ->join('sizes','sizes.id','stock_reports.size_id')
         ->join('colors','colors.id','stock_reports.color_id')
        ->select('products.product_name','stock_reports.created_at'
            DB::raw('sum(quantity)'))

        ->groupby('stock_reports.created_at','products.product_name')
        ->orderby('stock_reports.created_at','desc')
        ->get();

输出应该是：

Name           Quantity    CREATED_AT
product_name1  XL-BLUE-15, L-RED-20 2019-08-12 
product_name2  L-BLUE-15, S-RED-20 2019-08-12
product_name1  M-BLUE-15, L-RED-20 2019-08-13

我的表格结构：

产品：

股票期权报告

尺寸

颜色

---

首先，通过终端或手动创建模型

php artisan make:model stock_reports
php artisan make:model sizes
php artisan make:model products
php artisan make:model colors

在字典应用程序中添加到stock_reports.php文件

    public function product()
    {
        return $this->belongsTo(products::class, 'product_id');
    }
    public function size()
    {
        return $this->belongsTo(sizes::class, 'size_id');
    }
    public function color()
    {
        return $this->belongsTo(colors::class, 'color_id');
    }

将函数报告添加到products.php

    public function reports()
    {
        return $this->hasMany(stock_reports::class, 'product_id');
    }

最后，在您的控制中使用：

        $stock_reports=stock_reports::
        with('product')
        ->get()->sortBy('product.product_name')->sortBy('created_at');

        foreach($stock_reports as $report)
        {
            $product_name=$report->product->product_name;
            $size_name=$report->size->size_name;
            $color_name=$report->color->color_name;
            $qty_products=$report->product->reports()->count();

            // use wherever you need to use it

        }

结果:

Name Quantity CREATED_AT
T-shirt C x-Red-1 2019-09-11 18:55:12
Name Quantity CREATED_AT
T-shirt D xl-Blue-1 2019-09-11 18:55:12
Name Quantity CREATED_AT
T-shirt A xl-Blue-1 2019-09-12 18:55:12
Name Quantity CREATED_AT
T-shirt B x-White-1 2019-09-13 18:55:12

一些建议：

使用而不是->获取

使用外键

添加$stockReport时的结果是什么？

    public function product()
    {
        return $this->belongsTo(products::class, 'product_id');
    }
    public function size()
    {
        return $this->belongsTo(sizes::class, 'size_id');
    }
    public function color()
    {
        return $this->belongsTo(colors::class, 'color_id');
    }

    public function reports()
    {
        return $this->hasMany(stock_reports::class, 'product_id');
    }

        $stock_reports=stock_reports::
        with('product')
        ->get()->sortBy('product.product_name')->sortBy('created_at');

        foreach($stock_reports as $report)
        {
            $product_name=$report->product->product_name;
            $size_name=$report->size->size_name;
            $color_name=$report->color->color_name;
            $qty_products=$report->product->reports()->count();

            // use wherever you need to use it

        }

Name Quantity CREATED_AT
T-shirt C x-Red-1 2019-09-11 18:55:12
Name Quantity CREATED_AT
T-shirt D xl-Blue-1 2019-09-11 18:55:12
Name Quantity CREATED_AT
T-shirt A xl-Blue-1 2019-09-12 18:55:12
Name Quantity CREATED_AT
T-shirt B x-White-1 2019-09-13 18:55:12