@诺曼..谢谢你的回复....我正在努力知道我的错误..我的代码去链接这个：
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const { body, validationResult } = require("express-validator");
    const Customer = require('../models/custdetails');
    const async    = require('async');

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然后我有一些与清理相关的代码..然后创建客户对象
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const customer = new Customer({
  firm_name : req.body.firm_name,
  firm_feature : req.body.firm_feature,
  first_name: req.body.first_name,
  last_name: req.body.last_name,
  mob_no: req.body.mob_no,
  cust_email : req.body.cust_email,
  date_of_onboard: req.body.date_of_onboard,
  date_of_visit: req.body.date_of_visit,
  cust_need : req.body.cust_need,
  status : req.body.status,
  contact_back : req.body.contact_back,
});

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这里firm features和cust_need都是数组，那么
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const data = req.body;
customer.update({$push: {customer: data},function(err, res){if (err) {
          console.log("This is the error while inserting data:", err);
          }else {console.log(res); }   }   });

          res.redirect(customer.url);
        }
]

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我的数据无法插入数据库。我已经尝试了所有方法。请帮助
我也试过如下

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    (async function(){
          try {
            const filter = { first_name: req.body.first_name};
            const options = {upsert: true};  
            const result = await customer.updateOne(filter, {$set:{data}}, options).then(function(){
            console.log("data is inserted");
            console.log('${result.matchedCount} document(s) matched the filter, updated ${result.modifiedCount} document(s)')
          })
           }catch(err) {
            console.log("Some error has occurred in insertion");
            console.log(err);
          };
        });
        res.status(200).redirect(customer.url);
      }

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下面是我的custdetails.js
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const mongoose = require('mongoose');

const Schema = mongoose.Schema;

const CustSchema = new Schema(
  {
    firm_name:{type: String, maxLength:50},
    firm_feature: {type : { type: String }, enum: ['Private Limited Company', 'Public Limited Company',
                                      'Partnerships Company', 'Limited Liability Partnership LLP',
                                      'One Person Company', 'Sole Proprietorship',
                                      'Section 8 Company']},
    first_name: {type: String, required: true, maxLength: 100},
    last_name: {type: String, required: true, maxLength: 100},
    mob_no: {type: Number, required: true, maxLength:10},
    cust_email:{type: String, lowercase: true}, //always converts emailto lowercase before saving
    date_of_onboard: {type: Date},
    date_of_visit: {type: Date},
    cust_need: {type : { type: String }, enum:['Four Wheeler Loan', 'Home Loan', 'Two Wheeler Loan']},
    brperson: {type: Schema.Types.ObjectId, ref: 'Branch'},
    status: {type: Schema.Types.ObjectId, ref: 'CustInstance'},
    contact_back: {type: Schema.Types.ObjectId, ref: 'CustInstance' },

  }
);

//Export model
module.exports = mongoose.model('Customer', CustSchema);

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