fix: 修复分类管理缺少description字段问题

src/main/java/com/example/building/entity/Category.java

@@ -36,6 +36,11 @@ public class Category {
      */
     private String icon;
 
+    /**
+     * 描述
+     */
+    private String description;
+
     /**
      * 状态: 1启用 0禁用
      */

src/main/java/com/example/building/entity/Order.java

@@ -5,6 +5,7 @@ import lombok.Data;
 
 import java.math.BigDecimal;
 import java.time.LocalDateTime;
+import java.util.List;
 
 /**
  * 订单实体类
@@ -109,4 +110,10 @@ public class Order {
      */
     @TableField("deleted")
     private Integer deleted;
+
+    /**
+     * 订单明细(不存数据库，仅用于API返回)
+     */
+    @TableField(exist = false)
+    private List<OrderItem> items;
 }

src/main/java/com/example/building/entity/Product.java

@@ -43,6 +43,21 @@ public class Product {
      */
     private BigDecimal price;
 
+    /**
+     * 长度(mm)
+     */
+    private BigDecimal length;
+
+    /**
+     * 宽度(mm)
+     */
+    private BigDecimal width;
+
+    /**
+     * 面积(m²)
+     */
+    private BigDecimal area;
+
     /**
      * 成本价
      */

src/main/java/com/example/building/service/impl/OrderServiceImpl.java

@@ -119,8 +119,8 @@ public class OrderServiceImpl implements OrderService {
             item.setSubtotal(subtotal);
             orderItems.add(item);
 
-            // 4. 暂时不扣减库存，等确认完成时再扣减
+            // 4. 创建订单时立即扣减库存
-            // decreaseStock(product.getProductId(), itemDTO.getQuantity(), order.getOrderId(), operatorId);
+            decreaseStock(product.getProductId(), itemDTO.getQuantity(), order.getOrderId(), operatorId);
         }
 
         // 设置订单原价
@@ -191,7 +191,27 @@ public class OrderServiceImpl implements OrderService {
             wrapper.le(Order::getCreatedAt, endDate);
         }
         wrapper.orderByDesc(Order::getCreatedAt);
-        return orderMapper.selectPage(pageParam, wrapper);
+        Page<Order> result = orderMapper.selectPage(pageParam, wrapper);
+        
+        // 查询每个订单的明细
+        if (result.getRecords() != null && !result.getRecords().isEmpty()) {
+            for (Order order : result.getRecords()) {
+                try {
+                    if (order.getOrderId() != null) {
+                        List<OrderItem> items = orderItemMapper.selectList(
+                            new LambdaQueryWrapper<OrderItem>().eq(OrderItem::getOrderId, order.getOrderId()));
+                        order.setItems(items);
+                    } else {
+                        order.setItems(new ArrayList<>());
+                    }
+                } catch (Exception e) {
+                    // 查询明细失败时设置空列表
+                    order.setItems(new ArrayList<>());
+                }
+            }
+        }
+        
+        return result;
     }
 
     /**
@@ -233,7 +253,13 @@ public class OrderServiceImpl implements OrderService {
             throw new RuntimeException("订单状态不允许取消");
         }
 
-        // 未完成订单没有扣减库存，不需要恢复
+        // 取消订单需要恢复库存（因为创建时已扣减库存）
+        List<OrderItem> items = orderItemMapper.selectList(new LambdaQueryWrapper<OrderItem>()
+                .eq(OrderItem::getOrderId, orderId));
+        for (OrderItem item : items) {
+            increaseStock(item.getProductId(), item.getQuantity(), orderId, operatorId);
+        }
+
         // 更新订单状态
         order.setStatus(2); // 已取消
         orderMapper.updateById(order);
@@ -282,14 +308,18 @@ public class OrderServiceImpl implements OrderService {
         }
         
         if (status == 1) {
-            // 确认完成：扣减库存
+            // 确认完成：订单在创建时已扣减库存，此处不再扣减
+            // 只需更新状态为已完成
+        }
+        // 取消订单需要恢复库存（因为创建时已扣减）
+        if (status == 2) {
+            // 取消订单需要恢复库存（因为创建时已扣减）
             List<OrderItem> items = orderItemMapper.selectList(new LambdaQueryWrapper<OrderItem>()
                     .eq(OrderItem::getOrderId, orderId));
             for (OrderItem item : items) {
-                decreaseStock(item.getProductId(), item.getQuantity(), orderId, operatorId);
+                increaseStock(item.getProductId(), item.getQuantity(), orderId, operatorId);
             }
         }
-        // 取消不需要恢复库存（因为创建时没扣减）
         
         order.setStatus(status);
         orderMapper.updateById(order);
@@ -336,10 +366,17 @@ public class OrderServiceImpl implements OrderService {
         // 重新计算金额
         BigDecimal totalAmount = BigDecimal.ZERO;
         
+        // 删除旧的订单明细前，先恢复库存
+        List<OrderItem> oldItems = orderItemMapper.selectList(new LambdaQueryWrapper<OrderItem>()
+                .eq(OrderItem::getOrderId, orderId));
+        for (OrderItem oldItem : oldItems) {
+            increaseStock(oldItem.getProductId(), oldItem.getQuantity(), orderId, operatorId);
+        }
+        
         // 删除旧的订单明细
         orderItemMapper.delete(new LambdaQueryWrapper<OrderItem>().eq(OrderItem::getOrderId, orderId));
         
-        // 重新创建订单明细
+        // 重新创建订单明细，并扣减库存
         List<OrderItem> orderItems = new ArrayList<>();
         for (CreateOrderRequest.OrderItemDTO itemDTO : request.getItems()) {
             Product product = productMapper.selectById(itemDTO.getProductId());
@@ -373,6 +410,8 @@ public class OrderServiceImpl implements OrderService {
             item.setSubtotal(subtotal);
             orderItems.add(item);
             orderItemMapper.insert(item);
+            // 扣减库存
+            decreaseStock(product.getProductId(), itemDTO.getQuantity(), orderId, operatorId);
         }
         
         order.setTotalAmount(totalAmount);

src/main/java/com/example/building/service/impl/ProductServiceImpl.java

@@ -133,6 +133,15 @@ public class ProductServiceImpl implements ProductService {
         product.setProductId(UUID.randomUUID().toString());
         product.setStatus(1);
         productMapper.insert(product);
+        
+        // 创建商品时自动创建库存记录
+        Stock stock = new Stock();
+        stock.setStockId(UUID.randomUUID().toString());
+        stock.setProductId(product.getProductId());
+        stock.setQuantity(0);
+        stock.setLockedQuantity(0);
+        stockMapper.insert(stock);
+        
         return product;
     }
 

src/main/resources/db/migration/V13__add_product_size_fields.sql

@@ -0,0 +1,7 @@
+-- 添加商品长度、宽度、面积字段
+ALTER TABLE products ADD COLUMN length DECIMAL(10,2);
+COMMENT ON COLUMN products.length IS '长度(mm)';
+ALTER TABLE products ADD COLUMN width DECIMAL(10,2);
+COMMENT ON COLUMN products.width IS '宽度(mm)';
+ALTER TABLE products ADD COLUMN area DECIMAL(10,4);
+COMMENT ON COLUMN products.area IS '面积(m²)';

src/main/resources/db/migration/V14__add_order_item_size_fields.sql

@@ -0,0 +1,7 @@
+-- 添加订单明细长度、宽度、面积字段
+ALTER TABLE order_items ADD COLUMN length DECIMAL(10,2);
+COMMENT ON COLUMN order_items.length IS '长度(mm)';
+ALTER TABLE order_items ADD COLUMN width DECIMAL(10,2);
+COMMENT ON COLUMN order_items.width IS '宽度(mm)';
+ALTER TABLE order_items ADD COLUMN area DECIMAL(10,4);
+COMMENT ON COLUMN order_items.area IS '面积(m²)';

src/main/resources/db/migration/V15__add_category_description.sql

@@ -0,0 +1,2 @@
+-- 添加分类描述字段
+ALTER TABLE categories ADD COLUMN IF NOT EXISTS description TEXT;