1、所需删除信息内容说明
课程基本信息、描述信息、章节信息、小节信息、小节里还包括视频,删除课程时删除所有信息。
2、删除课程的接口
(1)在EduCourseController添加删除课程(以及相关信息)方法
            
            
              java
              
              
            
          
          @ApiOperation(value = "删除课程(以及相关信息)")
@DeleteMapping("{courseId}")
public R deleteCourse(@PathVariable String courseId){
    courseService.deleteCourse(courseId);
    return R.ok();
}(2)在EduCourseService添加接口
            
            
              java
              
              
            
          
          void deleteCourse(String courseId);(3)在EduCourseServiceImpl实现接口方法
            
            
              java
              
              
            
          
          //删除课程(以及相关信息)
@Override
public void deleteCourse(String courseId) {
    //1根据课程id删除小节
    //TODO 删除小节前删除视频
    QueryWrapper<EduVideo> wrapperVideo = new QueryWrapper<>();
    wrapperVideo.eq("course_id",courseId);
    videoService.remove(wrapperVideo);
    //2根据课程id删除章节
    QueryWrapper<EduChapter> wrapperChapter = new QueryWrapper<>();
    wrapperChapter.eq("course_id",courseId);
    chapterService.remove(wrapperChapter);
    //3根据课程id删除描述
    courseDescriptionService.removeById(courseId);
    //4根据课程id删除课程
    int delete = baseMapper.deleteById(courseId);
    if(delete==0){
        throw  new GuliException(20001,"删除课程失败");
    }
}3、整合前端
(1)在api/course.js中添加删除课程的接口方法
            
            
              java
              
              
            
          
          //删除课程方法
  deleteCourse(courseId){
    return request({
      url: `/eduservice/educourse/${courseId}`,
      method: 'delete'
    })
  }(2)修改course/list.vue页面,调用删除课程接口方法
            
            
              java
              
              
            
          
          <el-button type="text" @click="removeCourseId(scope.row.id)" size="mini" icon="el-icon-delete">删除</el-button>(3)在course/list.vue页面实现删除课程js方法
            
            
              java
              
              
            
          
          //删除课程(以及相关信息)
    removeCourseId(id) {
        this.$confirm("此操作将永久删除该课程, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      })
        .then(() => {
          //调用接口删除数据
          course.deleteCourse(id).then(response => {
            //提示
            this.$message({
              type: "success",
              message: "删除成功!"
            });
            //刷新表格
            this.getCourseList();
          });
        })
    }