优化带关联项的删除：角色、权限、菜单、部门

eladmin-common/src/main/java/me/zhengjie/utils/ThrowableUtil.java

 package me.zhengjie.utils;
 
+import me.zhengjie.exception.BadRequestException;
+import org.hibernate.exception.ConstraintViolationException;
+
 import java.io.PrintWriter;
 import java.io.StringWriter;
 
@@ -25,4 +28,15 @@ public class ThrowableUtil {
             pw.close();
         }
     }
+
+    public static void throwForeignKeyException(Throwable e, String msg){
+        Throwable t = e.getCause();
+        while ((t != null) && !(t instanceof ConstraintViolationException)) {
+            t = t.getCause();
+        }
+        if (t instanceof ConstraintViolationException) {
+            throw new BadRequestException(msg);
+        }
+        throw new BadRequestException("删除失败：" + t.getMessage());
+    }
 }

eladmin-system/src/main/java/me/zhengjie/modules/system/repository/PermissionRepository.java

 package me.zhengjie.modules.system.repository;
 
 import me.zhengjie.modules.system.domain.Permission;
-import me.zhengjie.modules.system.domain.Role;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
-
-import java.util.Collection;
 import java.util.List;
-import java.util.Set;
 
 /**
  * @author Zheng Jie

eladmin-system/src/main/java/me/zhengjie/modules/system/repository/RoleRepository.java

@@ -3,6 +3,8 @@ package me.zhengjie.modules.system.repository;
 import me.zhengjie.modules.system.domain.Role;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.Query;
 
 import java.util.Set;
 
@@ -21,5 +23,11 @@ public interface RoleRepository extends JpaRepository<Role, Long>, JpaSpecificat
 
     Set<Role> findByUsers_Id(Long id);
 
-    Set<Role> findByMenus_Id(Long id);
+    @Modifying
+    @Query(value = "delete from roles_permissions where permission_id = ?1",nativeQuery = true)
+    void untiedPermission(Long id);
+
+    @Modifying
+    @Query(value = "delete from roles_menus where menu_id = ?1",nativeQuery = true)
+    void untiedMenu(Long id);
 }

eladmin-system/src/main/java/me/zhengjie/modules/system/rest/DeptController.java

@@ -7,6 +7,7 @@ import me.zhengjie.modules.system.domain.Dept;
 import me.zhengjie.modules.system.service.DeptService;
 import me.zhengjie.modules.system.service.dto.DeptDTO;
 import me.zhengjie.modules.system.service.dto.DeptQueryCriteria;
+import me.zhengjie.utils.ThrowableUtil;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -63,7 +64,11 @@ public class DeptController {
     @DeleteMapping(value = "/dept/{id}")
     @PreAuthorize("hasAnyRole('ADMIN','DEPT_ALL','DEPT_DELETE')")
     public ResponseEntity delete(@PathVariable Long id){
-        deptService.delete(id);
+        try {
+            deptService.delete(id);
+        }catch (Throwable e){
+            ThrowableUtil.throwForeignKeyException(e, "该部门存在岗位或者角色关联，请取消关联后再试");
+        }
         return new ResponseEntity(HttpStatus.OK);
     }
 }
\ No newline at end of file

eladmin-system/src/main/java/me/zhengjie/modules/system/rest/PermissionController.java

@@ -6,6 +6,7 @@ import me.zhengjie.exception.BadRequestException;
 import me.zhengjie.modules.system.service.PermissionService;
 import me.zhengjie.modules.system.service.dto.PermissionDTO;
 import me.zhengjie.modules.system.service.dto.PermissionQueryCriteria;
+import me.zhengjie.modules.system.service.mapper.PermissionMapper;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -13,7 +14,9 @@ import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 /**
  * @author Zheng Jie
@@ -26,6 +29,9 @@ public class PermissionController {
     @Autowired
     private PermissionService permissionService;
 
+    @Autowired
+    private PermissionMapper permissionMapper;
+
     private static final String ENTITY_NAME = "permission";
 
     /**
@@ -68,7 +74,11 @@ public class PermissionController {
     @DeleteMapping(value = "/permissions/{id}")
     @PreAuthorize("hasAnyRole('ADMIN','PERMISSION_ALL','PERMISSION_DELETE')")
     public ResponseEntity delete(@PathVariable Long id){
-        permissionService.delete(id);
+        List<Permission> permissions = permissionService.findByPid(id);
+        Set<Permission> permissionSet = new HashSet<>();
+        permissionSet.add(permissionMapper.toEntity(permissionService.findById(id)));
+        permissionSet = permissionService.getDeletePermission(permissions, permissionSet);
+        permissionService.delete(permissionSet);
         return new ResponseEntity(HttpStatus.OK);
     }
 }

eladmin-system/src/main/java/me/zhengjie/modules/system/rest/RoleController.java

@@ -8,6 +8,8 @@ import me.zhengjie.modules.system.service.RoleService;
 import me.zhengjie.modules.system.service.dto.RoleQueryCriteria;
 import me.zhengjie.modules.system.service.dto.RoleSmallDTO;
 import me.zhengjie.utils.SecurityUtils;
+import me.zhengjie.utils.ThrowableUtil;
+import org.hibernate.exception.ConstraintViolationException;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
@@ -15,6 +17,7 @@ import org.springframework.data.web.PageableDefault;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.access.prepost.PreAuthorize;
+import org.springframework.transaction.TransactionSystemException;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 import java.util.Collections;
@@ -106,7 +109,11 @@ public class RoleController {
     @DeleteMapping(value = "/roles/{id}")
     @PreAuthorize("hasAnyRole('ADMIN','ROLES_ALL','ROLES_DELETE')")
     public ResponseEntity delete(@PathVariable Long id){
-        roleService.delete(id);
+        try {
+            roleService.delete(id);
+        }catch (Throwable e){
+            ThrowableUtil.throwForeignKeyException(e, "该角色存在用户关联，请取消关联后再试");
+        }
         return new ResponseEntity(HttpStatus.OK);
     }
 }

eladmin-system/src/main/java/me/zhengjie/modules/system/service/PermissionService.java

@@ -8,6 +8,7 @@ import org.springframework.cache.annotation.CacheEvict;
 import org.springframework.cache.annotation.Cacheable;
 
 import java.util.List;
+import java.util.Set;
 
 /**
  * @author Zheng Jie
@@ -41,10 +42,10 @@ public interface PermissionService {
 
     /**
      * delete
-     * @param id
+     * @param permissions
      */
     @CacheEvict(allEntries = true)
-    void delete(Long id);
+    void delete(Set<Permission> permissions);
 
     /**
      * permission tree
@@ -76,4 +77,6 @@ public interface PermissionService {
      */
     @Cacheable(keyGenerator = "keyGenerator")
     List<PermissionDTO> queryAll(PermissionQueryCriteria criteria);
+
+    Set<Permission> getDeletePermission(List<Permission> permissions, Set<Permission> permissionSet);
 }

eladmin-system/src/main/java/me/zhengjie/modules/system/service/RoleService.java

 package me.zhengjie.modules.system.service;
 
-import me.zhengjie.modules.system.domain.Menu;
 import me.zhengjie.modules.system.domain.Role;
 import me.zhengjie.modules.system.service.dto.RoleDTO;
 import me.zhengjie.modules.system.service.dto.RoleQueryCriteria;
@@ -10,7 +9,6 @@ import org.springframework.cache.annotation.CacheEvict;
 import org.springframework.cache.annotation.Cacheable;
 import org.springframework.data.domain.Pageable;
 
-import javax.servlet.http.HttpServletResponse;
 import java.util.List;
 import java.util.Set;
 
@@ -80,7 +78,7 @@ public interface RoleService {
     void updateMenu(Role resources, RoleDTO roleDTO);
 
     @CacheEvict(allEntries = true)
-    void untiedMenu(Menu menu);
+    void untiedMenu(Long id);
 
     /**
      * queryAll
@@ -106,4 +104,7 @@ public interface RoleService {
      */
     @Cacheable(keyGenerator = "keyGenerator")
     List<RoleDTO> queryAll(RoleQueryCriteria criteria);
+
+    @CacheEvict(allEntries = true)
+    void untiedPermission(Long id);
 }

eladmin-system/src/main/java/me/zhengjie/modules/system/service/impl/MenuServiceImpl.java

@@ -134,7 +134,7 @@ public class MenuServiceImpl implements MenuService {
     @Transactional(rollbackFor = Exception.class)
     public void delete(Set<Menu> menuSet) {
         for (Menu menu : menuSet) {
-            roleService.untiedMenu(menu);
+            roleService.untiedMenu(menu.getId());
             menuRepository.deleteById(menu.getId());
         }
     }

eladmin-system/src/main/java/me/zhengjie/modules/system/service/impl/PermissionServiceImpl.java

@@ -5,6 +5,7 @@ import me.zhengjie.exception.BadRequestException;
 import me.zhengjie.exception.EntityExistException;
 import me.zhengjie.modules.system.repository.PermissionRepository;
 import me.zhengjie.modules.system.service.PermissionService;
+import me.zhengjie.modules.system.service.RoleService;
 import me.zhengjie.modules.system.service.dto.PermissionDTO;
 import me.zhengjie.modules.system.service.dto.PermissionQueryCriteria;
 import me.zhengjie.modules.system.service.mapper.PermissionMapper;
@@ -30,6 +31,9 @@ public class PermissionServiceImpl implements PermissionService {
     @Autowired
     private PermissionMapper permissionMapper;
 
+    @Autowired
+    private RoleService roleService;
+
     @Override
     public List<PermissionDTO> queryAll(PermissionQueryCriteria criteria) {
         return permissionMapper.toDto(permissionRepository.findAll((root, criteriaQuery, criteriaBuilder) -> QueryHelp.getPredicate(root,criteria,criteriaBuilder)));
@@ -74,14 +78,26 @@ public class PermissionServiceImpl implements PermissionService {
         permissionRepository.save(permission);
     }
 
+    @Override
+    public Set<Permission> getDeletePermission(List<Permission> permissions, Set<Permission> permissionSet) {
+        // 递归找出待删除的菜单
+        for (Permission permission : permissions) {
+            permissionSet.add(permission);
+            List<Permission> permissionList = permissionRepository.findByPid(permission.getId());
+            if(permissionList!=null && permissionList.size()!=0){
+                getDeletePermission(permissionList, permissionSet);
+            }
+        }
+        return permissionSet;
+    }
+
     @Override
     @Transactional(rollbackFor = Exception.class)
-    public void delete(Long id) {
-        List<Permission> permissionList = permissionRepository.findByPid(id);
-        for (Permission permission : permissionList) {
+    public void delete(Set<Permission> permissions) {
+        for (Permission permission : permissions) {
+            roleService.untiedPermission(permission.getId());
             permissionRepository.delete(permission);
         }
-        permissionRepository.deleteById(id);
     }
 
     @Override

eladmin-system/src/main/java/me/zhengjie/modules/system/service/impl/RoleServiceImpl.java

 package me.zhengjie.modules.system.service.impl;
 
-import me.zhengjie.modules.system.domain.Menu;
 import me.zhengjie.modules.system.domain.Role;
 import me.zhengjie.exception.EntityExistException;
 import me.zhengjie.modules.system.repository.RoleRepository;
@@ -10,7 +9,6 @@ import me.zhengjie.modules.system.service.dto.RoleQueryCriteria;
 import me.zhengjie.modules.system.service.dto.RoleSmallDTO;
 import me.zhengjie.modules.system.service.mapper.RoleMapper;
 import me.zhengjie.modules.system.service.mapper.RoleSmallMapper;
-import me.zhengjie.utils.FileUtil;
 import me.zhengjie.utils.PageUtil;
 import me.zhengjie.utils.QueryHelp;
 import me.zhengjie.utils.ValidationUtil;
@@ -20,8 +18,6 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Propagation;
 import org.springframework.transaction.annotation.Transactional;
-
-import javax.servlet.http.HttpServletResponse;
 import java.util.*;
 import java.util.stream.Collectors;
 
@@ -112,13 +108,15 @@ public class RoleServiceImpl implements RoleService {
     }
 
     @Override
-    public void untiedMenu(Menu menu) {
-        Set<Role> roles = roleRepository.findByMenus_Id(menu.getId());
-        for (Role role : roles) {
-            menu.getRoles().remove(role);
-            role.getMenus().remove(menu);
-            roleRepository.save(role);
-        }
+    @Transactional(rollbackFor = Exception.class)
+    public void untiedMenu(Long id) {
+        roleRepository.untiedMenu(id);
+    }
+
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public void untiedPermission(Long id) {
+        roleRepository.untiedPermission(id);
     }
 
     @Override