service-article/app/service/read.js

'use strict';
const { CrudService } = require('naf-framework-mongoose/lib/service');
const { BusinessError, ErrorCode } = require('naf-core').Error;
const _ = require('lodash');
const assert = require('assert');

// 阅读数加一
class ReadService extends CrudService {
  constructor(ctx) {
    super(ctx, 'read');
  }
  async plus(model, id) {
    assert(model && id, '缺少数据');
    // _.capitalize=>首字母大写
    const data = await this.ctx.model[_.capitalize(model)].findById(id);
    if (!data) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到要阅读的数据');
    // 默认将read给0,别引起错误,数据不对可以讨论,找原因,但是程序中断了就不好了
    data.read = (data.read || 0) + 1;
    await data.save();
  }
}

module.exports = ReadService;