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modules/Mall/Models/GoodsSku.php

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+<?php
+
+namespace Modules\Mall\Models;
+
+use App\Models\Model;
+use App\Traits\HasCovers;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+use Modules\Mall\Models\Traits\GoodsAttribute;
+use Overtrue\LaravelVersionable\Versionable;
+
+class GoodsSku extends Model
+{
+
+    use HasCovers,
+        Versionable,
+        GoodsAttribute,
+        SoftDeletes;
+
+    protected $table = 'mall_goods_skus';
+
+    /**
+     * 不参与版本记录的字段
+     *
+     * @var array|string[]
+     */
+    protected array $dontVersionable = ['updated_at'];
+
+    /**
+     * Notes   : 所属品牌
+     *
+     * @Date   : 2021/5/11 11:00 上午
+     * @Author : < Jason.C >
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function goods(): BelongsTo
+    {
+        return $this->belongsTo(Goods::class);
+    }
+
+    /**
+     * Notes   : 当前规格是否可购买
+     *
+     * @Date   : 2021/5/14 10:08
+     * @Author : Mr.wang
+     * @param  int  $qty
+     * @return bool
+     */
+    public function canBuy(int $qty = 1): bool
+    {
+        if ($this->goods->channel == Goods::CHANNEL_FREE) {
+            return true;
+        }
+
+        if ($this->goods->status == Goods::STATUS_UP && $this->stock >= $qty) {
+            return true;
+        }
+
+        return false;
+    }
+
+}