reading-platform-java/src/main/java/com/reading/platform/mapper/CoursePackageMapper.java

@@ -16,13 +16,6 @@ public interface CoursePackageMapper extends BaseMapper<CoursePackage> {
     @Update("UPDATE course_package SET usage_count = usage_count + 1 WHERE id = #{coursePackageId}")
     void incrementUsageCount(@Param("coursePackageId") Long coursePackageId);
 
-    /**
-     * 减少课程包使用次数（课程取消时调用）
-     * @param coursePackageId 课程包 ID
-     */
-    @Update("UPDATE course_package SET usage_count = GREATEST(usage_count - 1, 0) WHERE id = #{coursePackageId}")
-    void decrementUsageCount(@Param("coursePackageId") Long coursePackageId);
-
     /**
      * 更新课程包教师数量（去重统计已完成课程的教师）
      * @param coursePackageId 课程包 ID

reading-platform-java/src/main/java/com/reading/platform/service/impl/LessonServiceImpl.java

@@ -174,7 +174,6 @@ public class LessonServiceImpl extends ServiceImpl<LessonMapper, Lesson>
     public void startLesson(Long id) {
         Lesson lesson = getLessonById(id);
         lesson.setStatus(LessonStatus.IN_PROGRESS.getCode());
-        lesson.setStartDatetime(LocalDateTime.now());
         lessonMapper.updateById(lesson);
         log.info("课程开始：id={}", id);
     }
@@ -184,7 +183,6 @@ public class LessonServiceImpl extends ServiceImpl<LessonMapper, Lesson>
     public void completeLesson(Long id) {
         Lesson lesson = getLessonById(id);
         lesson.setStatus(LessonStatus.COMPLETED.getCode());
-        lesson.setEndDatetime(LocalDateTime.now());
         lessonMapper.updateById(lesson);
         log.info("课程完成：id={}", id);
 
@@ -202,12 +200,6 @@ public class LessonServiceImpl extends ServiceImpl<LessonMapper, Lesson>
         lesson.setStatus(LessonStatus.CANCELLED.getCode());
         lessonMapper.updateById(lesson);
         log.info("课程取消：id={}", id);
-
-        // 更新课程包统计：使用次数 -1（取消的课程不计入使用）
-        if (lesson.getCourseId() != null) {
-            coursePackageMapper.decrementUsageCount(lesson.getCourseId());
-            log.info("课程包使用次数 -1: courseId={}", lesson.getCourseId());
-        }
     }
 
     @Override

reading-platform-java/src/main/resources/db/migration/V10__update_course_package_stats.sql

@@ -1,37 +0,0 @@
--- -----------------------------------------------------
--- V10: 更新课程包统计数据
--- 说明：根据 lesson 表实际数据更新 course_package 的 usage_count 和 teacher_count
--- 时间：2026-03-20
--- -----------------------------------------------------
-
--- 1. 更新 usage_count：统计 status != 'cancelled' 的课程数
-UPDATE course_package cp
-SET usage_count = (
-    SELECT COUNT(*)
-    FROM lesson l
-    WHERE l.course_id = cp.id
-    AND l.status != 'cancelled'
-    AND l.deleted = 0
-)
-WHERE cp.deleted = 0;
-
--- 2. 更新 teacher_count：统计 status = 'completed' 的课程中去重教师数
-UPDATE course_package cp
-SET teacher_count = (
-    SELECT COUNT(DISTINCT l.teacher_id)
-    FROM lesson l
-    WHERE l.course_id = cp.id
-    AND l.status = 'completed'
-    AND l.teacher_id IS NOT NULL
-    AND l.deleted = 0
-)
-WHERE cp.deleted = 0;
-
--- 3. 处理 NULL 值，确保字段为 0 而不是 NULL
-UPDATE course_package cp
-SET usage_count = 0
-WHERE usage_count IS NULL AND deleted = 0;
-
-UPDATE course_package cp
-SET teacher_count = 0
-WHERE teacher_count IS NULL AND deleted = 0;