chore: init saasshop repo + sql migrations runner + gitee go

app/Models/OrderItem.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class OrderItem extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'merchant_id', 'order_id', 'product_id', 'product_title', 'product_sku', 'product_price', 'quantity', 'line_total_amount', 'snapshot',
+    ];
+
+    protected $casts = [
+        'product_price' => 'decimal:2',
+        'line_total_amount' => 'decimal:2',
+        'snapshot' => 'array',
+    ];
+
+    public function merchant(): BelongsTo
+    {
+        return $this->belongsTo(Merchant::class, 'merchant_id');
+    }
+
+    public function order(): BelongsTo
+    {
+        return $this->belongsTo(Order::class);
+    }
+
+    public function product(): BelongsTo
+    {
+        return $this->belongsTo(Product::class);
+    }
+
+    public function scopeForMerchant(Builder $query, int $merchantId): Builder
+    {
+        return $query->where('merchant_id', $merchantId);
+    }
+}