ThinkJS中如何使用MongoDB的CURD操作

getList(q, page) { 
 return this.select();
 }

search(q, page) { 
 if(q) {
  q = new RegExp(q,'i');
 }
 return this.where({'name':{ $regex: q}}).page(page, 20).countSelect();
 }

getDetail(id) { 
  return this.where({'_id':id}).select(); 
 }

addTag(tag) { 
 return this.add(tag);
 }

updateTag(id,data) { 
 return this.where({'_id':id}).update(data);
 }

 removeOne(id) {
 return this.where({'_id':id}).delete();
 }

async createAction() { 
 let name = this.post('name');
 let contents = this.post('contents');
 // 获取模型实例
 let m = this.model('tag');
 let res = await m.addTag({
  'name': name,
  'contents': contents,
  'count': 0,
 });
 if(res) {
  this.success('');
 }else{
  this.apiErrorHandle(4000);
 }
 }
 ....