javascript - Mongoose 模型不保存，不抛出错误

Question

我的猫鼬模型（节点/快速应用程序）既不保存也不抛出错误，我不知道为什么......

这是我的模型。它有一个 Post 通过架构 ID 引用许多评论：

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var CommentSchema = new Schema({
  body: {type: String, required: true, max: 2000},
  created: { type: Date, default: Date.now },
  flags: {type: Number, default: 0}
}, {
  writeConcern: {
    w: 0,
    j: false,
    wtimeout: 200
  }  
});

var PostSchema = new Schema({
  body: {type: String, required: true, max: 2000},
  created: { type: Date, default: Date.now },
  flags: {type: Number, default: 0},
  comments: [{ type: Schema.Types.ObjectId, ref: 'Comment' }]
}, {
  writeConcern: {
    w: 0,
    j: false,
    wtimeout: 200
  }  
});

var Post =  mongoose.model('Post', PostSchema);
var Comment = mongoose.model('Comment', CommentSchema)

module.exports = {
  Post: Post,
  Comment: Comment
} 

这是我的路线。它只是从传入的正文创建一个帖子并尝试保存它。它引用导出的帖子，model.Post因为导出的模块是一个对象。

var express = require('express');
var router = express.Router();
const fs = require('fs');
var model = require('../models/model');

router.post('/uploadPost', (req, res, next)=>{
  console.log('inside /uploadPost')
  console.log('value of req.files: ', req.files)
  console.log('value of req.body: ', req.body)

  var post = {
    body: req.body.post, 
    created: Date.now(),
    flags: 0, 
    comments: []
  }

  console.log('value of post: ', post)

  let postInstance = new model.Post(post)

  console.log('value of postInstance: ', postInstance)

  postInstance.save().then(post=>{
    console.log('value of post: ', post)
  }).catch( (e) => {
    console.log('There was an error', e.message);
  });

  res.json({return: 'return from /uploadPost'})
})

module.exports = router;

这是我的终端输出。它管理console.log除了保存回调或错误之外的所有内容。我认为这可能是与 的竞争条件res.json，所以我把它放在回调中，但这也没有做任何事情。到底是怎么回事？

value of req.body:  { post: 'lkjlkjlk' }
value of post:  { body: 'lkjlkjlk',
  created: 1552587547653,
  flags: 0,
  comments: [] }
value of postInstance:  { flags: 0,
  comments: [],
  _id: 5c8a9b1ba7cece70037d3f46,
  body: 'lkjlkjlk',
created: 2019-03-14T18:19:07.653Z }

编辑：

我错误地连接到猫鼬......叹息。

这是一个正确的连接代码（上面是正确的）：

mongoose.connect("mongodb://localhost:27017/mydb");
mongoose.Promise = global.Promise;
var db = mongoose.connection;
db.on('error', console.error.bind(console, 'MongoDB connection error:'));
db.once('open', function() {
  // we're connected!
  console.log('connected to mongoose db')
});

标签： javascriptnode.jsmongodbexpressmongoose