苍穹外卖--删除一条购物车

sky-server/src/main/java/com/sky/controller/user/ShoppingCartController.java

@@ -45,4 +45,13 @@ public class ShoppingCartController {
         shoppingCartService.cleanShoppingCart();
         return Result.success();
     }
+
+
+    @PostMapping("/sub")
+    @ApiOperation("删除购物车中一个商品")
+    public Result subShoppingCart(@RequestBody ShoppingCartDTO shoppingCartDTO){
+        log.info("删除购物车中一个商品");
+        shoppingCartService.subShoppingCart(shoppingCartDTO);
+        return Result.success();
+    }
 }

sky-server/src/main/java/com/sky/mapper/ShoppingCartMapper.java

@@ -26,4 +26,7 @@ public interface ShoppingCartMapper {
 
     @Delete("delete from shopping_cart where user_id = #{userId}")
     void deleteByUserId(Long userId);
+
+    @Delete("delete from shopping_cart where id = #{id}")
+    void deleteById(Long id);
 }

sky-server/src/main/java/com/sky/service/ShoppingCartService.java

@@ -20,4 +20,7 @@ public interface ShoppingCartService {
     清空购物车
      */
     void cleanShoppingCart();
+
+    void subShoppingCart(ShoppingCartDTO shoppingCartDTO);
+
 }

sky-server/src/main/java/com/sky/service/impl/ShoppingCartServiceImpl.java

@@ -113,4 +113,25 @@ public class ShoppingCartServiceImpl implements ShoppingCartService {
 
         shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());
     }
+
+    /*
+    删除购物车中一个商品
+     */
+    @Override
+    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
+        ShoppingCart cart = new ShoppingCart();
+        BeanUtils.copyProperties(shoppingCartDTO,cart);
+        cart.setUserId(BaseContext.getCurrentId());
+        List<ShoppingCart> cartList = shoppingCartMapper.list(cart);
+        if (cartList != null && cartList.size() > 0) {
+            cart = cartList.get(0);
+
+            if (cart.getNumber() > 1) {
+                cart.setNumber(cart.getNumber() - 1);
+                shoppingCartMapper.updateNumberById(cart);
+            } else {
+                shoppingCartMapper.deleteById(cart.getId());
+            }
+        }
+    }
 }