How to use

size

function

in

ObjectChain

app.post('/excel/students/add', (req, res) => {
 const { data, templateId, username } = req.body
 const templateIsExist = db.get('students.'+ templateId).value()
 if (!templateIsExist) {
  db.set('students.'+ templateId, []).write()
 }
 const studentsDB = db.get('students.'+ templateId)
 const flag = data.every(v=>{
  const isDul = studentsDB.find({'身份证号': v.身份证号}).value()
  if (isDul) {
   v.error = true
  }
  return !isDul;
 })
 if (flag) {
  data.map(v=>{
   studentsDB.insert({...initObj(v),username: username}).write()
  })
  const peopleCount = studentsDB.size()
  db.get('template').find({id: templateId}).assign({peopleCount: peopleCount}).write()
  resultSend(res, true, '添加')
 } else {
  const repeatData = data.filter(v=>v.error = true)
  res.send(resultFail('添加失败，存在重复的身份证号', repeatData))
 }
})