Update

app/Models/ShoppingCartItem.php

@@ -11,6 +11,7 @@ class ShoppingCartItem extends Model
      */
     protected $casts = [
         'quantity' => 'int',
+        'specs' => 'json',
     ];
 
     /**
@@ -19,6 +20,11 @@ class ShoppingCartItem extends Model
     protected $fillable = [
         'user_id',
         'sku_id',
+        'name',
+        'cover',
+        'sell_price',
+        'vip_price',
+        'specs',
         'quantity',
     ];
 
@@ -27,6 +33,13 @@ class ShoppingCartItem extends Model
      */
     public function sku()
     {
-        return $this->belongsTo(ProductSku::class);
+        return $this->belongsTo(ProductSku::class)->withDefault(function ($sku, $item) {
+            $sku->id = $item->sku_id;
+            $sku->name = $item->name;
+            $sku->cover = $item->cover;
+            $sku->sell_price = $item->sell_price;
+            $sku->vip_price = $item->vip_price;
+            $sku->specs = $item->specs;
+        });
     }
 }

database/migrations/2021_12_06_171251_create_shopping_cart_items_table.php

@@ -17,6 +17,11 @@ class CreateShoppingCartItemsTable extends Migration
             $table->id();
             $table->unsignedBigInteger('user_id')->comment('用户ID');
             $table->unsignedBigInteger('sku_id')->comment('商品ID');
+            $table->string('name')->comment('商品名称');
+            $table->string('cover')->nullable()->comment('封面图');
+            $table->unsignedBigInteger('sell_price')->default(0)->comment('销售价格:分');
+            $table->unsignedBigInteger('vip_price')->nullable()->comment('会员价格:分');
+            $table->json('specs')->nullable()->comment('规格属性');
             $table->unsignedInteger('quantity')->default(0)->comment('购买数量');
             $table->timestamps();
 

database/migrations/2021_12_07_143655_create_orders_table.php

@@ -18,12 +18,12 @@ class CreateOrdersTable extends Migration
             $table->unsignedBigInteger('user_id')->comment('用户ID');
             $table->string('sn')->comment('订单编号');
             $table->unsignedBigInteger('user_coupon_id')->nullable()->comment('用户优惠券 ID');
-            $table->unsignedBigInteger('discount_amount')->default(0)->comment('商品优惠');
+            $table->unsignedBigInteger('coupon_amount')->default(0)->comment('优惠券金额');
             $table->unsignedBigInteger('vip_amount')->default(0)->comment('会员优惠');
             $table->unsignedBigInteger('reduced_amount')->default(0)->comment('减免金额');
             $table->unsignedBigInteger('shipping_fee')->default(0)->comment('运费');
             $table->unsignedBigInteger('products_total_amount')->comment('商品总额');
-            $table->unsignedBigInteger('total_amount')->comment('订单总额（支付金额）=商品总额+运费-会员优惠-商品优惠-减免金额');
+            $table->unsignedBigInteger('total_amount')->comment('订单总额（支付金额）=商品总额+运费-优惠券金额-会员优惠-减免金额');
             $table->unsignedInteger('weight')->nullable()->comment('订单重量');
             $table->string('note')->nullable()->comment('客户备注');
             $table->string('remark')->nullable()->comment('订单备注');

database/migrations/2021_12_07_143722_create_order_products_table.php

@@ -28,10 +28,10 @@ class CreateOrderProductsTable extends Migration
             $table->unsignedInteger('weight')->nullable()->comment('重量:g');
             $table->unsignedBigInteger('sell_price')->comment('商品价格');
             $table->unsignedBigInteger('vip_price')->comment('会员价格');
-            $table->unsignedBigInteger('discount_amount')->default(0)->comment('商品优惠');
+            $table->unsignedBigInteger('coupon_amount')->default(0)->comment('优惠券金额');
             $table->unsignedBigInteger('vip_amount')->default(0)->comment('会员优惠');
             $table->unsignedBigInteger('reduced_amount')->default(0)->comment('减免金额');
-            $table->unsignedBigInteger('total_amount')->comment('商品总额（支付金额）=商品价格*数量-商品优惠-会员优惠-减免金额');
+            $table->unsignedBigInteger('total_amount')->comment('商品总额（支付金额）=商品价格*数量-优惠券金额-会员优惠-减免金额');
             $table->boolean('is_comment')->default(false)->comment('是否评论');
             $table->timestamp('after_sale_deadline')->nullable()->comment('售后截止时间');
             $table->timestamps();