一、新增章节
web层
@ApiOperation(value = "新增章节")
@PostMapping
public R save(
@ApiParam(name = "chapterVo", value = "章节对象", required = true)
@RequestBody Chapter chapter){
chapterService.save(chapter);
return R.ok();
}
二、根据id查询
web层
@ApiOperation(value = "根据ID查询章节")
@GetMapping("{id}")
public R getById(
@ApiParam(name = "id", value = "章节ID", required = true)
@PathVariable String id){
Chapter chapter = chapterService.getById(id);
return R.ok().data("item", chapter);
}
三、更新
web层
@ApiOperation(value = "根据ID修改章节")
@PutMapping("{id}")
public R updateById(
@ApiParam(name = "id", value = "章节ID", required = true)
@PathVariable String id,
@ApiParam(name = "chapter", value = "章节对象", required = true)
@RequestBody Chapter chapter){
chapter.setId(id);
chapterService.updateById(chapter);
return R.ok();
}
四、删除
1、web层
@ApiOperation(value = "根据ID删除章节")
@DeleteMapping("{id}")
public R removeById(
@ApiParam(name = "id", value = "章节ID", required = true)
@PathVariable String id){
boolean result = chapterService.removeChapterById(id);
if(result){
return R.ok();
}else{
return R.error().message("删除失败");
}
}
2、Service
ChapterService层：接口
boolean removeChapterById(String id);
ChapterService层：实现
@Override
public boolean removeChapterById(String id) {
//根据id查询是否存在视频，如果有则提示用户尚有子节点
if(videoService.getCountByChapterId(id)){
throw new GuliException(20001,"该分章节下存在视频课程，请先删除视频课程");
}
Integer result = baseMapper.deleteById(id);
return null != result && result > 0;
}
VideoService：接口
boolean getCountByChapterId(String chapterId);
VideoService：实现
@Override
public boolean getCountByChapterId(String chapterId) {
QueryWrapper<Video> queryWrapper = new QueryWrapper<>();
queryWrapper.eq("chapter_id", chapterId);
Integer count = baseMapper.selectCount(queryWrapper);
return null != count && count > 0;
}