9.18

src/main/java/com/teaching/backend/model/entity/favour/SeCourseFavour.java

@@ -31,12 +31,6 @@ public class SeCourseFavour implements Serializable {
      */
     private String userId;
 
-    /**
-     * 创建用户 id
-     */
-    private DateTime createtime;
-
-
 
     @TableField(exist = false)
     private static final long serialVersionUID = 1L;

src/main/java/com/teaching/backend/service/impl/favour/SeCourseFavourServiceImpl.java

@@ -4,6 +4,7 @@ import cn.hutool.core.bean.BeanUtil;
 import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.date.DateTime;
 import com.baomidou.mybatisplus.core.conditions.Wrapper;
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
@@ -66,40 +67,41 @@ public class SeCourseFavourServiceImpl extends ServiceImpl<SeCourseFavourMapper,
         System.out.println("进入点赞" + courseId + userId);
         //从数据库中校验是否存在courseid
         Courses courses = coursesMapper.selectById(courseId);
-        boolean result = false;
-        if(courses == null){
-            return ResultUtils.error(ErrorCode.NOT_FOUND_ERROR,"课程不存在");
+
+        if (courses == null) {
+            return ResultUtils.error(ErrorCode.NOT_FOUND_ERROR, "课程不存在");
         }
-        //查询数据库记录，该用户是否点赞
-        SeCourseFavour seCourseFavour = new SeCourseFavour();
-        seCourseFavour.setCourseId(courseId);
-        seCourseFavour.setUserId(userId);
-        seCourseFavour.setCreatetime(DateTime.now());
-        QueryWrapper<SeCourseFavour> favourQueryWrapper = new QueryWrapper<>(seCourseFavour);
-        SeCourseFavour oldSeCourseFavour = this.getOne(favourQueryWrapper);
+
+        LambdaQueryWrapper<SeCourseFavour> lambdaQueryWrapper = new LambdaQueryWrapper<>();
+        lambdaQueryWrapper.eq(SeCourseFavour::getCourseId, courseId)
+                .eq(SeCourseFavour::getUserId, userId);
+
+        SeCourseFavour oldSeCourseFavour = seCourseFavourMapper.selectOne(lambdaQueryWrapper);
+        System.out.println("查询条件: courseId=" + courseId + ", userId=" + userId);
+        System.out.println("查询结果: " + oldSeCourseFavour);
+
         //已点赞
-        if (oldSeCourseFavour != null) {
-            // 取消点赞 删除记录
-            result = this.remove(favourQueryWrapper);
-            if (result) {
-                System.out.println("取消点赞成功");
-                return ResultUtils.success(result);
+
+        if (oldSeCourseFavour == null) {
+            // 如果没有记录，则添加收藏
+            SeCourseFavour newSeCourseFavour = new SeCourseFavour();
+            newSeCourseFavour.setCourseId(courseId);
+            newSeCourseFavour.setUserId(userId);
+            int insertResult = seCourseFavourMapper.insert(newSeCourseFavour);
+
+            if (insertResult > 0) {
+                return ResultUtils.success(true);
             } else {
-                throw new BusinessException(ErrorCode.SYSTEM_ERROR);
+                return ResultUtils.error(ErrorCode.OPERATION_ERROR);
             }
         } else {
-            // 每个用户串行点赞
-            // 锁必须要包裹住事务方法
-            Lock lock = new ReentrantLock();
-            lock.lock();
-            try {
-                result = this.save(seCourseFavour);
-            } catch (Exception e) {
-                throw new BusinessException(ErrorCode.OPERATION_ERROR);
-            } finally {
-                lock.unlock();
-                System.out.println("点赞成功");
-                return ResultUtils.success(result);
+            // 如果有记录，则删除记录，也就是取消收藏
+            int deleteResult = seCourseFavourMapper.delete(lambdaQueryWrapper);
+
+            if (deleteResult > 0) {
+                return ResultUtils.success(false);
+            } else {
+                return ResultUtils.error(ErrorCode.OPERATION_ERROR);
             }
         }
     }