NodeJS - .save() 不是一个函数。无法通过猫鼬创建集合

Posted 2023-03-10

【中文标题】NodeJS - .save() 不是一个函数。无法通过猫鼬创建集合

【英文标题】：NodeJS - .save() is not a function. Unable to create collection via mongoose

【发布时间】：2017-05-08 21:11:34

【问题描述】：

我也面临 .save() is not a function error，但我已经经历了大多数类似的 SO Questions 并尝试了他们各自的答案，但徒劳无功。但是通过我的终端，我可以创建收藏并保存一个。 .find() 也在工作。以下是我的代码：

模型 -> clientUser.js

var mongoose = require('mongoose');

var ClientUser = new mongoose.Schema(

    firebaseUID :type: String,
    userName :  type : String,
    displayName :  type : String

);
ClientUser.index(firebaseUID: 1, unique: true);
module.exports = 
    ClientUser : ClientUser
;

dependency.js

'use strict';
var mongoose = require('mongoose');
var ClientUser = mongoose.model('ClientUser');
var getNewClientUserModel = function () 
  return mongoose.model('ClientUser');
;
module.exports = 
        getNewClientUserModel : getNewClientUserModel
;

clientUser -> add.js

'use strict';
var dependency = require('./../../dependency');
var _ = dependency.getLodash();

var add = function (request, response) 
    var firebaseUID = request.body.firebaseUID;
    var userName = request.body.userName;
    var displayName = request.body.displayName;
    var newClientUser= dependency.getNewClientUserModel();
    newClientUser.firebaseUID = firebaseUID;
    newClientUser.userName = userName;
    newClientUser.displayName = displayName;

    if (!firebaseUID || !userName) 
        response.send(400);
        return null;
     else 
        newClientUser.save(function (error,doc) 
            if (!_.isEmpty(error)) 
                response.send(500, 'message': 'Error in adding the Category', error: error);
             else 
                response.send(200);
            
            return null;
        );
    
;

module.exports = 
    add: add
;

app.js

var mongoose = require('mongoose');
mongoose.model('ClientUser', require('./models/clientUser').ClientUser);
/*
 *Routes importing
 */
var ClientUser = 
    'add' : require('./routes/clientuser/add').add
;

【问题讨论】：

你能记录下“依赖”吗？因为看起来依赖路径不正确。否则代码看起来不错。

【参考方案1】：

您需要将架构转换为您可以使用的模型，转换为您的 clientUser.js，然后将其传递给 mongoose.model(modelName, schema)： p>

module.exports = mongoose.model('ClientUser', ClientUser);

【参考方案2】：

您的问题出在/models/clientUser.js，您正在导出架构。我的建议是从该模块导出模型。另外我不明白dependency.js 的建议，为什么不在你的添加处理程序中直接使用模型？下面是一个应该可行的建议。

models/clientUser.js

var mongoose = require('mongoose');

var clientUserSchema = new mongoose.Schema(
    firebaseUID :type: String,
    userName :  type : String,
    displayName :  type : String
);
clientUserSchema.index(firebaseUID: 1, unique: true);
var ClientUser = mongoose.model('ClientUser', clientUserSchema);
module.exports = 
    ClientUser : ClientUser
;

routes/clientuser/add.js

'use strict';
 var ClientUser = require('./clientUser').ClientUser;

 var add = function (request, response) 
     var firebaseUID = request.body.firebaseUID;
     var userName = request.body.userName;
     var displayName = request.body.displayName;
     var newClientUser = new ClientUser(
         firebaseUID: firebaseUID,
         userName: userName,
         displayName: displayName
     );

     if (!firebaseUID || !userName) 
       return response.send(400);
      
      newClientUser.save(function (error, doc) 
         if (error) 
             return response.send(500,  'message': 'Error in adding the Category', error: error );
          
          return response.sendStatus(200);
      );

    ;

module.exports = 
  add: add
;

app.js

/*
 *Routes importing
 */
var ClientUser = 
    'add' : require('./routes/clientuser/add').add
;