service-question/app/service/question.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;

// 问题
class QuestionService extends CrudService {
  constructor(ctx) {
    super(ctx, 'question');
    this.model = this.ctx.model.Question;
    this.questionnaire = this.ctx.model.Questionnaire;
  }
  /**
   * 重写删除函数:因为删除题目同时也需要删除问卷保存该题目的id
   * @param {Object} { id } 数据id
   */
  async delete({ id }) {
    const res = await this.questionnaire.find({ questions: id }, '+questions');
    if (res.length > 0) {
      for (const i of res) {
        i.questions = i.questions.filter(f => f !== id);
        await i.save();
      }
    }
    await this.model.deleteOne({ _id: id });
  }

  async getQuestions(ids) {
    const res = await this.model.find({ _id: ids });
    // 按选择顺序排序
    const arr = [];
    for (let i = 0; i < ids.length; i++) {
      const id = ids[i];
      const r = res.find(f => ObjectId(id).equals(f._id));
      if (r) arr.push(r);
    }
    return arr;
  }
}

module.exports = QuestionService;