部门列表api返回部门的学员数量

src/main/java/xyz/playedu/api/controller/backend/DepartmentController.java

@@ -47,6 +47,7 @@ public class DepartmentController {
     public JsonResponse index() {
         HashMap<String, Object> data = new HashMap<>();
         data.put("departments", departmentService.groupByParent());
+        data.put("dep_user_count", departmentService.getDepartmentsUserCount());
         return JsonResponse.data(data);
     }
 
@@ -133,7 +134,7 @@ public class DepartmentController {
     @DeleteMapping("/{id}")
     public JsonResponse destroy(@PathVariable Integer id) throws NotFoundException {
         Department department = departmentService.findOrFail(id);
-        departmentService.deleteById(department.getId());
+        departmentService.destroy(department.getId());
         ctx.publishEvent(new DepartmentDestroyEvent(this, BCtx.getId(), department.getId()));
         return JsonResponse.success();
     }

src/main/java/xyz/playedu/api/controller/backend/UserController.java

@@ -38,6 +38,7 @@ import java.util.stream.Collectors;
 
 /**
  * @Author 杭州白书科技有限公司
+ *
  * @create 2023/2/23 09:48
  */
 @RestController
@@ -45,17 +46,13 @@ import java.util.stream.Collectors;
 @RequestMapping("/backend/v1/user")
 public class UserController {
 
-    @Autowired
-    private UserService userService;
+    @Autowired private UserService userService;
 
-    @Autowired
-    private UserDepartmentService userDepartmentService;
+    @Autowired private UserDepartmentService userDepartmentService;
 
-    @Autowired
-    private DepartmentService departmentService;
+    @Autowired private DepartmentService departmentService;
 
-    @Autowired
-    private ApplicationContext context;
+    @Autowired private ApplicationContext context;
 
     @BackendPermissionMiddleware(slug = BPermissionConstant.USER_INDEX)
     @GetMapping("/index")

src/main/java/xyz/playedu/api/mapper/DepartmentMapper.java

@@ -9,6 +9,9 @@ import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import org.apache.ibatis.annotations.Mapper;
 
 import xyz.playedu.api.domain.Department;
+import xyz.playedu.api.types.mapper.DepartmentsUserCountMapRes;
+
+import java.util.List;
 
 /**
  * @author tengteng
@@ -16,4 +19,6 @@ import xyz.playedu.api.domain.Department;
  * @createDate 2023-02-19 12:19:45 @Entity xyz.playedu.api.domain.Department
  */
 @Mapper
-public interface DepartmentMapper extends BaseMapper<Department> {}
+public interface DepartmentMapper extends BaseMapper<Department> {
+    List<DepartmentsUserCountMapRes> getDepartmentsUserCount();
+}

src/main/java/xyz/playedu/api/service/DepartmentService.java

@@ -25,13 +25,11 @@ public interface DepartmentService extends IService<Department> {
 
     Department findOrFail(Integer id) throws NotFoundException;
 
-    void deleteById(Integer id) throws NotFoundException;
+    void destroy(Integer id) throws NotFoundException;
 
     void update(Department department, String name, Integer parentId, Integer sort)
             throws NotFoundException;
 
-    List<Integer> allIds();
-
     String compParentChain(Integer parentId) throws NotFoundException;
 
     String childrenParentChain(Department department);
@@ -53,4 +51,6 @@ public interface DepartmentService extends IService<Department> {
     Map<Integer, String> id2name();
 
     Long total();
+
+    Map<Integer, Integer> getDepartmentsUserCount();
 }

src/main/java/xyz/playedu/api/service/impl/DepartmentServiceImpl.java

@@ -21,6 +21,7 @@ import xyz.playedu.api.mapper.DepartmentMapper;
 import xyz.playedu.api.service.CourseDepartmentService;
 import xyz.playedu.api.service.DepartmentService;
 import xyz.playedu.api.service.internal.UserDepartmentService;
+import xyz.playedu.api.types.mapper.DepartmentsUserCountMapRes;
 
 import java.util.*;
 import java.util.stream.Collectors;
@@ -60,7 +61,7 @@ public class DepartmentServiceImpl extends ServiceImpl<DepartmentMapper, Departm
 
     @Override
     @Transactional
-    public void deleteById(Integer id) throws NotFoundException {
+    public void destroy(Integer id) throws NotFoundException {
         Department department = findOrFail(id);
         updateParentChain(department.getParentChain(), childrenParentChain(department));
         removeById(department.getId());
@@ -136,16 +137,6 @@ public class DepartmentServiceImpl extends ServiceImpl<DepartmentMapper, Departm
         updateBatchById(updateRows);
     }
 
-    @Override
-    public List<Integer> allIds() {
-        List<Department> departments = list(query().getWrapper().eq("1", "1").select("id"));
-        List<Integer> ids = new ArrayList<>();
-        for (Department department : departments) {
-            ids.add(department.getId());
-        }
-        return ids;
-    }
-
     @Override
     public String compParentChain(Integer parentId) throws NotFoundException {
         String parentChain = "";
@@ -257,4 +248,13 @@ public class DepartmentServiceImpl extends ServiceImpl<DepartmentMapper, Departm
     public Long total() {
         return count();
     }
+
+    @Override
+    public Map<Integer, Integer> getDepartmentsUserCount() {
+        return getBaseMapper().getDepartmentsUserCount().stream()
+                .collect(
+                        Collectors.toMap(
+                                DepartmentsUserCountMapRes::getDepId,
+                                DepartmentsUserCountMapRes::getTotal));
+    }
 }

src/main/java/xyz/playedu/api/types/mapper/DepartmentsUserCountMapRes.java

@@ -0,0 +1,19 @@
+/**
+ * This file is part of the PlayEdu.
+ * (c) 杭州白书科技有限公司
+ */
+package xyz.playedu.api.types.mapper;
+
+import lombok.Data;
+
+/**
+ * @Author 杭州白书科技有限公司
+ *
+ * @create 2023/4/12 13:46
+ */
+@Data
+public class DepartmentsUserCountMapRes {
+    private Integer depId;
+
+    private Integer total;
+}

src/main/resources/mapper/DepartmentMapper.xml

@@ -19,4 +19,9 @@
         parent_chain,sort,created_at,
         updated_at
     </sql>
+    <select id="getDepartmentsUserCount" resultType="xyz.playedu.api.types.mapper.DepartmentsUserCountMapRes">
+        SELECT `dep_id`, count(1) AS `total`
+        FROM user_department
+        GROUP BY dep_id;
+    </select>
 </mapper>