service-center/app/service/student.js

'use strict';


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

class StudentService extends CrudService {
  constructor(ctx) {
    super(ctx, 'student');
    this.model = this.ctx.model.Student;
  }

  // 查询
  async seek({ termid, skip, limit }) {
    const students = await this.model.find({ termid, classid: null });
    const data = await this.model.find({ termid, classid: null }).skip(Number(skip)).limit(Number(limit));
    const total = await students.length;
    const result = { total, data };
    return result;
  }

  async findbedroom(data) {
    const { batchid, classid } = data;
    const result = [];
    // 如果传的是批次id
    if (batchid) {
      // 查询该批次下的所有学生
      const students = await this.model.find({ batchid });
      const bedroomList = new Set();
      // 查询该批次的所有寝室号
      for (const student of students) {
        bedroomList.add(student.bedroom);
      }
      let studentList = [];
      // 查询该批次所有寝室下的学生名单
      for (const bedroom of bedroomList) {
        const newstudents = await this.model.find({ bedroom });
        for (const newstudent of newstudents) {
          studentList.push(newstudent.name);
        }
        result.push({ bedroom, studentList });
        studentList = [];
      }
    }
    // 如果传的是班级id
    if (classid) {
      // 查询该班级所有学生
      const students = await this.model.find({ classid });
      const bedroomList = new Set();
      // 查询该班级所有寝室号
      for (const student of students) {
        bedroomList.add(student.bedroom);
      }
      let studentList = [];
      // 查询该班级所有寝室的学生名单
      for (const bedroom of bedroomList) {
        const newstudents = await this.model.find({ bedroom });
        for (const newstudent of newstudents) {
          // 如果寝室中有非本班级学生（混寝），则过滤掉不予显示
          if (newstudent.classid === classid) {
            studentList.push(newstudent.name);
          }
        }
        result.push({ bedroom, studentList });
        studentList = [];
      }
    }
    return result;
  }

}

module.exports = StudentService;