From e5a41142020cc1f8189d959dbf576b6ad6b81db2 Mon Sep 17 00:00:00 2001
From: LoveLosita <2810873701@qq.com>
Date: Wed, 11 Feb 2026 18:44:13 +0800
Subject: [PATCH] =?UTF-8?q?Version:=200.2.5.dev.260211=20feat:=20?=
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- 通过 task_class 与 task_item 两张表建立级联关系 🔗
- 删除 task_class 时自动删除关联的 task_item
- 保证数据一致性，避免产生孤立数据 ✅
---
 backend/api/task-class.go     | 20 ++++++++++++++++++++
 backend/dao/task-class.go     | 13 +++++++++++++
 backend/respond/respond.go    | 10 ++++++++++
 backend/routers/routers.go    |  1 +
 backend/service/task-class.go | 26 ++++++++++++++++++++++++++
 5 files changed, 70 insertions(+)

diff --git a/backend/api/task-class.go b/backend/api/task-class.go
index 56528b8..74ab7a6 100644
--- a/backend/api/task-class.go
+++ b/backend/api/task-class.go
@@ -151,3 +151,23 @@ func (api *TaskClassHandler) DeleteTaskClassItem(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, respond.Ok)
 }
+
+func (api *TaskClassHandler) DeleteTaskClass(c *gin.Context) {
+	taskClassID := c.Query("task_class_id")
+	//将taskClassID转换为int
+	intTaskClassID, err := strconv.Atoi(taskClassID)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, respond.WrongParamType)
+		return
+	}
+	userID := c.GetInt("user_id")
+	// 创建一个带 1 秒超时的上下文
+	ctx, cancel := context.WithTimeout(c.Request.Context(), 1*time.Second)
+	defer cancel() // 记得释放资源
+	err = api.svc.DeleteTaskClass(ctx, userID, intTaskClassID)
+	if err != nil {
+		respond.DealWithError(c, err)
+		return
+	}
+	c.JSON(http.StatusOK, respond.Ok)
+}
diff --git a/backend/dao/task-class.go b/backend/dao/task-class.go
index 0be5339..e9040e1 100644
--- a/backend/dao/task-class.go
+++ b/backend/dao/task-class.go
@@ -218,3 +218,16 @@ func (dao *TaskClassDAO) DeleteTaskClassItemByID(ctx context.Context, id int) er
 		Delete(&model.TaskClassItem{}).Error
 	return err
 }
+
+func (dao *TaskClassDAO) DeleteTaskClassByID(ctx context.Context, id int) error {
+	res := dao.db.WithContext(ctx).
+		Where("id = ?", id).
+		Delete(&model.TaskClass{})
+	if res.Error != nil {
+		return res.Error
+	}
+	if res.RowsAffected == 0 {
+		return respond.WrongTaskClassID
+	}
+	return nil
+}
diff --git a/backend/respond/respond.go b/backend/respond/respond.go
index 334c3f0..ff888a2 100644
--- a/backend/respond/respond.go
+++ b/backend/respond/respond.go
@@ -250,4 +250,14 @@ var ( //请求相关的响应
 		Status: "40038",
 		Info:   "request is processing, please do not repeat click",
 	}
+
+	TaskClassNotBelongToUser = Response{ //任务类不属于用户
+		Status: "40039",
+		Info:   "task class does not belong to user",
+	}
+
+	WrongTaskClassID = Response{ //任务类ID错误
+		Status: "40040",
+		Info:   "wrong task class id",
+	}
 )
diff --git a/backend/routers/routers.go b/backend/routers/routers.go
index 0eed8c1..65eda15 100644
--- a/backend/routers/routers.go
+++ b/backend/routers/routers.go
@@ -70,6 +70,7 @@ func RegisterRouters(handlers *api.ApiHandlers, cache *dao.CacheDAO, limiter *pk
 			taskClassGroup.PUT("/update", middleware.IdempotencyMiddleware(cache), handlers.TaskClassHandler.UserUpdateTaskClass)
 			taskClassGroup.POST("/insert-into-schedule", middleware.IdempotencyMiddleware(cache), handlers.TaskClassHandler.UserAddTaskClassItemIntoSchedule)
 			taskClassGroup.DELETE("/delete-item", middleware.IdempotencyMiddleware(cache), handlers.TaskClassHandler.DeleteTaskClassItem)
+			taskClassGroup.DELETE("/delete-class", middleware.IdempotencyMiddleware(cache), handlers.TaskClassHandler.DeleteTaskClass)
 		}
 		scheduleGroup := apiGroup.Group("/schedule")
 		{
diff --git a/backend/service/task-class.go b/backend/service/task-class.go
index 1839e24..d26b67b 100644
--- a/backend/service/task-class.go
+++ b/backend/service/task-class.go
@@ -10,6 +10,7 @@ import (
 	"github.com/LoveLosita/smartflow/backend/model"
 	"github.com/LoveLosita/smartflow/backend/respond"
 	"github.com/go-redis/redis/v8"
+	"gorm.io/gorm"
 )
 
 type TaskClassService struct {
@@ -301,3 +302,28 @@ func (sv *TaskClassService) DeleteTaskClassItem(ctx context.Context, userID int,
 	}
 	return nil
 }
+
+func (sv *TaskClassService) DeleteTaskClass(ctx context.Context, userID int, taskClassID int) error {
+	//1.先验证任务类归属
+	ownerID, err := sv.taskClassRepo.GetTaskClassUserIDByID(ctx, taskClassID) //通过任务类ID获取所属用户ID
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return respond.WrongTaskClassID
+		}
+		return err
+	}
+	if ownerID != userID {
+		return respond.TaskClassNotBelongToUser
+	}
+	//2.删除任务类（事务）
+	err = sv.taskClassRepo.DeleteTaskClassByID(ctx, taskClassID)
+	if err != nil {
+		return err
+	}
+	//3.事务提交成功后，清除相关缓存（如果有的话），以保证数据一致性
+	err = sv.cacheRepo.DeleteTaskClassList(ctx, userID)
+	if err != nil {
+		log.Printf("Failed to delete task class list cache for userID %d: %v", userID, err)
+	}
+	return nil
+}