service-article/app/service/thumbs.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');
const { ObjectId } = require('mongoose').Types;

// 点赞
class ThumbsService extends CrudService {
  constructor(ctx) {
    super(ctx, 'thumbs');
    this.model = this.ctx.model.Thumbs;
  }
  async create(body) {
    // 有就取消点赞,没有就点赞
    const { openid, article_id } = body;
    const count = await this.model.count({ openid, article_id });
    let res = false;
    if (count > 0) await this.model.deleteOne({ openid, article_id });
    else { await this.model.create(body); res = true; }
    return res;
  }

  /**
   * 查询某人对某些数据是否点赞
   * @param {Object} { ids, openid }
   */
  async getSum({ ids, openid }) {
    const match = { article_id: { $in: ids.map(i => ObjectId(i)) } };
    if (openid) match.openid = openid;
    const res = await this.model.aggregate([
      { $match: match },
      { $group: {
        _id: '$article_id',
        sum: { $sum: 1 },
      } },
    ]);
    return res;
  }
}

module.exports = ThumbsService;