谷粒学院93——课程删除功能

需求如下。

EduCourseController。

 @DeleteMapping("deleteCourse/{courseId}")
    public R deleteCourse(@PathVariable String courseId) {
        Boolean delete = eduCourseService.removeCourse(courseId);
        if(delete) {
            return R.ok();
        } else {
            return R.error();
        }

    }

EduCourseService.

 	 @Autowired
    EduCourseDescriptionService eduCourseDescriptionService;
    
    @Autowired
    EduChapterService eduChapterService;
    
    @Autowired
    EduVideoService eduVideoService;

 	@Override
    public Boolean removeCourse(String courseId) {
        // 1.删除课程小节
        eduVideoService.deleteVideo(courseId);
        // 2.删除课程章节
        eduChapterService.deleteChapter(courseId);
        // 3.删除课程描述
        eduCourseDescriptionService.deleteDescription(courseId);
        // 4.删除课程
        return baseMapper.deleteById(courseId) > 0;
    }

EduVideoServiceImpl

@Override
public void deleteVideo(String courseId) {
    QueryWrapper<EduVideo> wrapper = new QueryWrapper<>();
    wrapper.eq("course_id", courseId);
    baseMapper.delete(wrapper);
}

EduCourseDescriptionServiceImpl

    @Override
    public void deleteDescription(String courseId) {
        baseMapper.deleteById(courseId);
    }

deleteChapter之前实现过了，此处不赘述。前端部分请读者自行实现。后端部分使用swagger测试，如下。检验数据库，功能实现。