angularJS + mongoose：TypeError：无法读取未定义的属性“模型”

Posted 2023-03-11

【中文标题】angularJS + mongoose：TypeError：无法读取未定义的属性“模型”

【英文标题】：angularJS + mongoose: TypeError: Cannot read property 'model' of undefined

【发布时间】：2016-06-19 08:58:06

【问题描述】：

我有一个简单的快速应用程序，它应该提供一个端点来发布一些内容。在我的控制器中调用 $http 后，我收到以下错误：

TypeError：无法读取未定义的属性“模型” 在新模型（C:\Webpages\veryNiceWords\API\node_modules\mongoose\lib\model.js:738:17） 在 C:\Webpages\veryNiceWords\API\api.js:24:17 在 Layer.handle [as handle_request] (C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\layer.js:95:5) 在下一个（C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\route.js:131:13） 在 Route.dispatch (C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\route.js:112:3) 在 Layer.handle [as handle_request] (C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\layer.js:95:5) 在 C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\index.js:277:22 在 Function.process_params (C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\index.js:330:12) 在下一个（C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\index.js:271:10） 在 C:\Webpages\veryNiceWords\API\api.js:16:2 在 Layer.handle [as handle_request] (C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\layer.js:95:5) 在 trim_prefix (C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\index.js:312:13) 在 C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\index.js:280:7 在 Function.process_params (C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\index.js:330:12) 在下一个（C:\Webpages\veryNiceWords\API\node_modules\express\lib\router\index.js:271:10） 在 C:\Webpages\veryNiceWords\API\node_modules\body-parser\lib\read.js:129:5

我不知道这意味着什么，或者如何解决它。有人可以看看我的代码并指出我做错了什么吗？

api.js（快递应用）

var express = require('express');
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var Words = require('./models/words.js');
//initialize our express app
var app = express();
//use body parser with JSON
app.use(bodyParser.json());

//middleware for CORS requests
app.use(function(req, res, next) 
    res.header('Access-Control-Allow-Origin', '*');
    res.header('Access-Control-Allow-Methods', 'GET, PUT, POST, DELETE');
    res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization');

    next();
);

//register endpoint
app.post('/API/addWords', function(req, res) 
    //get user from request body
    var words = req.body;

    var newWords = new Words.model(
        author: words.author,
        source: words.source,
        quote: words.quote
    );

    newWords.save(function(err) 
        if (err) throw err;

    console.log('words saved!');
    );
);

//connect to mongoDB
mongoose.connect('');

//define our server
var server = app.listen(3000, function() 
    console.log('api listening on ', server.address().port);
);

words.js（api需要的模型）

// grab the things we need
var mongoose = require('mongoose');
var Schema = mongoose.Schema;

// create a schema
var wordsSchema = new Schema(
  author: String,
  source: String,
  quote: String
);

var Words = mongoose.model('Words', wordsSchema);

// make this available to our users in our Node applications
module.exports = Words;

前端html：

<div class="container-fluid">
    <div class="row">
        <div class="form-group">
            <form ng-submit="submit()">
                <label for="author">Author:</label>
                <input type="text" class="form-control" id="author" ng-model="author" placeholder="Maya Angelou">
                <br>
                <label for="source">Source:</label>
                <input type="text" class="form-control" id="source" ng-model="source" placeholder="I know why the caged bird sings">
                <br>
                <label for="quote">Quote:</label>
                <textarea class="form-control" rows="10" id="quote" ng-model="quote" placeholder="There is no greater agony than bearing an untold story inside you"></textarea>
                <br>
                <div class="col-xs-4 col-xs-offset-4">
                    <input class="btn btn-default postQuote" type="submit" value="Quote it"></div>
            </form>
        </div>
    </div>
</div>

<div class="container">
    <p> author </p>
    <p> source </p>
    <p> quote </p>
</div>

前端控制器：

'use strict';

angular.module('frontEndApp')
    .controller('AddwordsCtrl', function($scope, $http) 
        $scope.submit = function() 

            var url = 'http://localhost:3000/API/addWords';
            var words = 
                author: $scope.author,
                source: $scope.source,
                quote: $scope.quote
            ;

            $http.post(url, words)
                .success(function(res) 
                    console.log('posted quote!');
                )
                .error(function(err) 
                    console.log(err);
                );
        ;
    );

感谢您的帮助。

【参考方案1】：

var newWords = new Words.model(有问题，应该是var newWords = new Words(

new Words.model( 不是必需的。只需要new Words(。

请更正代码。

【参考方案2】：

您希望“/API/addWords”的控制器端点如下所示：

app.post('/API/addWords', function(req, res) 
  //get user from request body
  var words = req.body;

  var newWords = new Words(
    author: words.author,
    source: words.source,
    quote: words.quote
  );

  newWords.save(function(err) 
    if (err) throw err;
    console.log('words saved!');
  );

);

您不需要额外的“模型”。