1、规格属性功能级联删除

2、属性分组删除判断是否可以删除
3、新增自定义商城业务异常类

xjs-business/xjs-business-common/src/main/java/com/xjs/exception/MallException.java

@@ -0,0 +1,24 @@
+package com.xjs.exception;
+
+import lombok.extern.log4j.Log4j2;
+
+/**
+ * 自定义商城业务异常
+ * @author xiejs
+ * @since  2022-03-17
+ */
+@Log4j2
+public class MallException extends RuntimeException{
+    public MallException() {
+        super();
+    }
+
+    public MallException(String message) {
+        super(message);
+        log.error("商城业务异常----{}",message);
+    }
+
+    public MallException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

xjs-business/xjs-project-mall/mall-product/src/main/java/com/xjs/mall/product/controller/AttrController.java

@@ -84,7 +84,7 @@ public class AttrController {
     @ApiOperation("删除")
     @Log(title = "规格参数", businessType = BusinessType.DELETE)
     public R delete(@RequestBody Long[] attrIds) {
-        attrService.removeByIds(Arrays.asList(attrIds));
+        attrService.removeAttr(Arrays.asList(attrIds));
 
         return R.ok();
     }

xjs-business/xjs-project-mall/mall-product/src/main/java/com/xjs/mall/product/controller/AttrGroupController.java

@@ -97,7 +97,7 @@ public class AttrGroupController {
     @ApiOperation("删除")
     @Log(title = "属性分组", businessType = BusinessType.DELETE)
     public R delete(@RequestBody Long[] attrGroupIds) {
-        attrGroupService.removeByIds(Arrays.asList(attrGroupIds));
+        attrGroupService.removeAttrGroup(Arrays.asList(attrGroupIds));
 
         return R.ok();
     }

xjs-business/xjs-project-mall/mall-product/src/main/java/com/xjs/mall/product/service/AttrGroupService.java

@@ -4,6 +4,7 @@ import com.baomidou.mybatisplus.extension.service.IService;
 import com.xjs.mall.product.entity.AttrGroupEntity;
 import com.xjs.utils.PageUtils;
 
+import java.util.List;
 import java.util.Map;
 
 /**
@@ -17,12 +18,20 @@ public interface AttrGroupService extends IService<AttrGroupEntity> {
 
     /**
      * 分页
-     * @param params 条件
+     *
+     * @param params     条件
      * @param categoryId 类别id
      * @return pageUtils
      */
     PageUtils queryPage(Map<String, Object> params, Long categoryId);
 
+    /**
+     * 删除属性分组，校验，被引用则不删除
+     *
+     * @param ids id
+     */
+    void removeAttrGroup(List<Long> ids);
+
     /**
      * 根据分类id查出所有的分组以及这些组里面的属性
      * @param categoryId 分类id

xjs-business/xjs-project-mall/mall-product/src/main/java/com/xjs/mall/product/service/AttrService.java

@@ -6,6 +6,7 @@ import com.xjs.mall.product.vo.AttrVo;
 import com.xjs.utils.PageUtils;
 import com.xjs.mall.product.entity.AttrEntity;
 
+import java.util.List;
 import java.util.Map;
 
 /**
@@ -43,5 +44,11 @@ public interface AttrService extends IService<AttrEntity> {
      * @param attr 实体类
      */
     void updateAttr(AttrVo attr);
+
+    /**
+     * 删除规格参数及关联信息
+     * @param asList ids
+     */
+    void removeAttr(List<Long> asList);
 }
 

xjs-business/xjs-project-mall/mall-product/src/main/java/com/xjs/mall/product/service/impl/AttrGroupServiceImpl.java

@@ -1,11 +1,15 @@
 package com.xjs.mall.product.service.impl;
 
+import cn.hutool.core.collection.CollUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.xjs.exception.MallException;
 import com.xjs.mall.product.dao.AttrGroupDao;
+import com.xjs.mall.product.entity.AttrAttrgroupRelationEntity;
 import com.xjs.mall.product.entity.AttrGroupEntity;
 import com.xjs.mall.product.entity.CategoryEntity;
+import com.xjs.mall.product.service.AttrAttrgroupRelationService;
 import com.xjs.mall.product.service.AttrGroupService;
 import com.xjs.mall.product.service.CategoryService;
 import com.xjs.mall.product.vo.AttrGroupResponseVo;
@@ -29,6 +33,9 @@ public class AttrGroupServiceImpl extends ServiceImpl<AttrGroupDao, AttrGroupEnt
     @Autowired
     private CategoryService categoryService;
 
+    @Autowired
+    private AttrAttrgroupRelationService attrAttrgroupRelationService;
+
     @Override
     public PageUtils queryPage(Map<String, Object> params, Long categoryId) {
         String key = (String) params.get(Query.KEY_NAME);
@@ -63,6 +70,22 @@ public class AttrGroupServiceImpl extends ServiceImpl<AttrGroupDao, AttrGroupEnt
 
     }
 
+    @Override
+    public void removeAttrGroup(List<Long> ids) {
+        for (Long id : ids) {
+            //先查询中间表是否有数据，有数据代表该数据被引用，则不能删除
+            List<AttrAttrgroupRelationEntity> relationEntityList = attrAttrgroupRelationService
+                    .list(new LambdaQueryWrapper<AttrAttrgroupRelationEntity>()
+                    .eq(AttrAttrgroupRelationEntity::getAttrGroupId, id));
+
+            if (CollUtil.isEmpty(relationEntityList)) {
+                super.removeById(id);
+            }else {
+                throw new MallException("含有被引用的规格参数未删除，请先删除规格参数");
+            }
+        }
+    }
+
 
     private List<AttrGroupResponseVo> setList(List<AttrGroupEntity> records) {
         return records.stream().map(attrGroupEntity -> {

xjs-business/xjs-project-mall/mall-product/src/main/java/com/xjs/mall/product/service/impl/AttrServiceImpl.java

@@ -169,4 +169,15 @@ public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements
 
     }
 
+    @Override
+    public void removeAttr(List<Long> asList) {
+        //删除自身
+        super.removeByIds(asList);
+        //级联删除中间表数据
+        for (Long id : asList) {
+            attrAttrgroupRelationService.remove(new LambdaUpdateWrapper<AttrAttrgroupRelationEntity>()
+                    .eq(AttrAttrgroupRelationEntity::getAttrId,id));
+        }
+    }
+
 }