删除返回信息不正确

app/service/headteacher.js

@@ -48,9 +48,9 @@ class HeadteacherService extends CrudService {
   }
 
   async delete({ id }) {
-    const res = await this.model.findByIdAndDelete(id);
+    await this.model.findByIdAndDelete(id);
     await this.umodel.deleteOne({ uid: id, type: '1' });
-    return res;
+    return 'deleted';
   }
 
 }

app/service/school.js

@@ -39,9 +39,9 @@ class SchoolService extends CrudService {
     return res;
   }
   async delete({ id }) {
-    const res = await this.model.findByIdAndDelete(id);
+    await this.model.findByIdAndDelete(id);
     await this.umodel.deleteOne({ uid: id, type: '2' });
-    return res;
+    return 'deleted';
   }
 
   async query({ name, ...data }, { skip, limit }) {

app/service/teacher.js

@@ -77,9 +77,9 @@ class TeacherService extends CrudService {
   }
 
   async delete({ id }) {
-    const res = await this.model.findByIdAndDelete(id);
+    await this.model.findByIdAndDelete(id);
     await this.umodel.deleteOne({ uid: id, type: '3' });
-    return res;
+    return 'deleted';
   }
 
   // 批量查询教师