TypeError：无法读取未定义的属性“分支”

Posted 2023-03-11

【中文标题】TypeError：无法读取未定义的属性“分支”

【英文标题】：TypeError: Cannot read property 'branchs' of undefined

【发布时间】：2017-07-19 19:12:25

【问题描述】：

模型/branch.js

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var branchSchema = new Schema(
  merchant_id:  type: [String], index: true ,
  contact_name: String,
  branch: String,
  phone: String,
  email: String,
  address: String,
  status: String,
  created_date:  type: Date, default: Date.now ,
  merchants: [ type: Schema.Types.ObjectId, ref: 'merchant' ]

);
var branch = mongoose.model('branch', branchSchema);
exports = branch;

models/merchants.js

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var merchantSchema = new Schema(
  merchant_name: String,
  merchant_type: String,
  contact_name: String,
  phone: String,
  email: String,
  Address: String,
  created_date:  type: Date, default: Date.now ,
  branches: [ type: Schema.Types.ObjectId, ref: 'branch' ]
);
var merchant = mongoose.model('merchant', merchantSchema);
exports = merchant;

index.js

var express = require('express');
var router = express.Router();
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var merchant = mongoose.model('merchant');
var branch = mongoose.model('branch');

router.post('/merchants/:merid/branch', function(req, res, next) 
  var branchs = new branch(req.body);
  branch.post = req.post;
  branchs.save(function(err, post) 
    if (err) 
      return next(err);
    
    req.post.branch.push(merchant);
    req.post.save(function(err, post) 
      if (err) 
        return next(err);
      
      res.json(branch);
    );
  );
);

我收到以下错误：

在 C:\survey-system\routes\index.js:80:14 在 C:\survey-system\node_modules\mongoose\lib\model.js:3431:16 在 C:\survey-system\node_modules\mongoose\lib\services\model\applyHooks.js:144:20 在 _combinedTickCallback (内部/进程/next_tick.js:67:7) 在 process._tickCallback (internal/process/next_tick.js:98:9)

【参考方案1】：

在index.js 中，您没有在任何地方包含您的模型。除非您在某处包含模型文件以在 mongoose 对象中填充模型，否则 mongoose 无法知道这些模型的存在。

index.js

var express = require('express');
var router = express.Router();
var bodyParser = require('body-parser');
var mongoose = require('mongoose');

var models = require('./models.js'); //This calls the js file models which then run their code, adding the models to mongoose.

//Now accessible.
var merchant = mongoose.model('merchant');
var branch = mongoose.model('branch');
...

models.js

var merchants = require('./models/merchant.js');
var branch = require('./models/branch.js');

【讨论】：

仍然面临同样的问题。