值"[object Object]，[object Object]，[object Object]转换为ObjectId失败时出错

Question

我正在使用Mongodb。当我想要更新字段时，我得到了以下值的错误Cast to ObjectId failed：

[object Object],[object Object],[object Object]。

当post为空时，让我更新所有属性，而有人发布某些内容，则我无法更新提供程序属性，并收到以下错误：

从ui bootstapt中查看哪些使用了模式。

<label class="col-lg-2 control-label">Company Name</label>
        <div class="col-lg-10">
          <input name="name" type="text" ng-model="provider.name" minlength="4" class="form-control" placeholder="Amazon Web Services" required>
          <span class="help-block" ng-show="cspRegister.name.$dirty &&  cspRegister.name.$invalid"> Not valid name!</span>
        </div>
      </div>
      <div class="form-group">
        <label class="col-lg-2 control-label">Abbreviated company name</label>
        <div class="col-lg-10">
          <input name="abbreviated" type="text" ng-model="provider.abbreviated" class="form-control" placeholder="AWS" >
        </div>
      </div>
      <div class="form-group">
        <label class="col-lg-2 control-label">Home page</label>
        <div class="col-lg-10">
          <input name="url" type="url"  ng-model="provider.url" class="form-control" placeholder="http://aws.amazon.com/" required>
          <span class="help-block" ng-show="cspRegister.url.$error.url"> Not valid url!</span>
        </div>
      </div>
      <!--start point of muli select-->
      <div class="form-group">
        <label class="col-lg-2 control-label">Product name</label>
        <div class="col-lg-10">
          <select name="services"  multiple ng-model="provider.services" class="form-control" required >
            <option value="paas">Paas</option>
            <option value="saas">Saas</option>
            <option value="dbaas">Dbaas</option>
          </select>
        </div>
      </div>
      <div class="form-group">
        <label  class="col-lg-2 control-label">Location</label>
        <div class="col-lg-10">
          <select multiple  ng-model="provider.locations" class="form-control" class="form-control" required>
            <option ng-repeat="item in locations" value="{{item.name}}">{{item.name}}</option>
          </select>
          <span class="help-block">A longer block of help text that breaks onto a new line and may extend beyond one line.</span>
        </div>
      </div>
      <!--end of multi selector-->
      <div class="form-group">
        <label class="col-lg-2 control-label">Description</label>
        <div class="col-lg-10">
          <textarea name="description" ng-model="provider.description" class="form-control" rows="3" required></textarea>
        </div>
      </div>
    </form>
</div>
<div class="modal-footer">
    <button ng-click="updateProvider(provider);ok()" class="btn btn-success"><i class="icon-white icon-plus"></i> Update & Close</button>
    <button ng-click="cancel()" class="btn btn-warning">Cancel</button>
</div>

提供程序架构

var ProviderSchema = new Schema({
  name: String,
  abbreviated: String,
 // company:String,
  services: {type : Array, default:[]},
  locations: {type : Array, default:[]},
  description: String,
  url: String,
  author: String,
  upvotes: { type:Number, default:0 },
  upvoteUser:{type : Array, default:[]},
  createdOn: { type: Date, default: Date.now },
  certificates:[{ type: mongoose.Schema.Types.ObjectId, ref: 'Certificates' }],
  posts: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Post' }]
});

ProviderSchema.methods.findByName = function (cb) {
  return this.model('Provider').find({ name: this.name }, cb);
}
ProviderSchema.methods.upvote = function(cb) {
  this.upvotes += 1;
  this.save(cb, function(error) {
    if(error){
      console.error("Error saving object: ", error)
    }
  });
};

这是工厂中的更新

ob.updateProvider = function (provider) {
       return $http.put('/api/providers/' + provider._id , provider, {
            headers: {Authorization: 'Bearer '+Auth.getToken()}
            }).success(function(provider){
       })
    };

这是我的api中的update函数

exports.update = function(req, res) {
  if(req.body._id) { delete req.body._id; }
  Provider.findById(req.params.id, function (err, provider) {
    if (err) { return handleError(res, err); }
    if(!provider) { return res.send(404); }

    var updated = _.merge(provider, req.body);
    updated.save(function (err) {
      if (err) { return handleError(res, err); }
      return res.json(200, provider);
    });
  });
};

这就是我的控制器中的东西。

$scope.updateProvider = function (updatedProvider) {
                var provider = updatedProvider;
                providers.updateProvider(provider)
                  .success(function () {
                    providers.getAll();
                    $scope.status = 'Updated provider! Refreshing provider list.';
                  })
                  .error(function(err, status) {
                    console.log(err);
                    console.log(status);
                  });
              };

这是更新后的结果：

 abbreviated: 'aws',
  _id: 55663fc20e9009c82dccba94,
  company: 'http://dbpedia.org/resource/SnapLogic',
  name: 'SnapLogic',
  description: 'SnapLogic is a commercial software company that provides data an
 2006. SnapLogic is headed by Ex-CEO and Co-Founder of Informatica, Gaurav Dhill
  __v: 25,
  posts:
   [ { upvotes: 4,
       upvoteUser: [Object],
       comments: [Object],
       __v: 16,
       author: 'Juan y Maryam',
       body: 'cc',
       title: 'cczzs',
       _id: '5569f716a4c7bbd4219a3303' },
     { upvotes: 4,
       upvoteUser: [Object],
       comments: [],
       __v: 4,
       author: 'Juan y Maryam',
       body: 'zzaaa',
       title: 'juan',
       _id: '5569fb10c61b1af02fa1cc39' },
     { upvotes: 4,
       upvoteUser: [Object],
       comments: [],
       __v: 4,
       author: 'Juan y Maryam',
       body: 'xxxxx',
       title: 'xxxxxxxxxx',
       _id: '5569fb15c61b1af02fa1cc3a' },
     { upvotes: 2,
       upvoteUser: [Object],
       comments: [],
       __v: 2,
       author: 'Test User',
       body: 'nnnnnnnnnnnnnnnn',
       title: 'ooooooooooooo',
       _id: '5569fcd3335d49d82ccef9cd' },
     { upvotes: 1,
       upvoteUser: [Object],
       comments: [],
       __v: 1,
       author: 'Editor',
       body: 'ss',
       title: 'sssssss',
       _id: '556a07892d62dadc182fcc1f' },
     { upvotes: 1,
       upvoteUser: [Object],
       comments: [],
       __v: 1,
       author: 'maya beaty',
       body: 'ssssssss',
       title: 'ssssssss',
       _id: '556a07f92d62dadc182fcc23' },
     { upvotes: 1,
       upvoteUser: [Object],
       comments: [],
       __v: 1,
       author: 'Maryam Pashmi',
       body: 'z',
       title: 'z',
       _id: '556a13e62848566023f03e6d' },
     556a07f92d62dadc182fcc23,
     556a13e62848566023f03e6d ],
  certificates: [],
  createdOn: Thu May 28 2015 00:05:54 GMT+0200 (Romance Daylight Time),
  upvoteUser: [ 'maya beaty', 'Maryam Pashmi', 'Juan y Maryam' ],
  upvotes: 3,
  locations: [ 'Åland Islands', 'Albania' ],
  services: [ 'saas' ] }
PUT /api/providers/55663fc20e9009c82dccba94 500 10ms

有没有人知道我为什么会得到这个错误，以及我必须在我的模式中更改什么问题？

Answer 1

我没有解决方案，但我可以尝试解释问题是什么，或者至少为什么它在您的情况下不起作用。尽管在最后有几个解决方案，它们可能工作，也可能不工作。

您的provider.posts是由"Posts“引用的另一组文档的数组，如您的提供者模式中所定义的那样。

posts: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Post' }]

posts: [
  {upvotes: 4, ... title: 'cczzs', _id: '5569f716a4c7bbd4219a3303' }, 
  {upvotes: 4, ... title: 'juan', _id: '5569fb10c61b1af02fa1cc39' }, 
  {upvotes: 4, ... _id: '5569fb15c61b1af02fa1cc3a' }, 
  ...
  {upvotes: 1, _id: '556a13e62848566023f03e6d' }, 
  556a07f92d62dadc182fcc23, 
  556a13e62848566023f03e6d
],

这些实际上应该保存为ID (556a07…)，因为这是在您的模式中定义它们的方式

实际上，如果你往最后看，有一些元素实际上只是if (556a07f92d62da…)，这些可能是从数据库中获取的，其他的是从req.body中获取的_.merged

问题是在保存时，由于某种原因，这些对象会被转换为字符串“对象对象”。这不应该发生，或者至少不会发生在我身上。我已经安装了mongoose@3.8，所以检查一下你是不是用的是旧版本。

为了确保这是问题的根本原因，您应该

delete req.body.posts;
var updated = _.merge(provider, req.body);
// now updates.posts should only have 2 IDs mentioned above
updated.save(...

看看能不能保存下来。

无论如何，通过older questions，你会发现有些人已经幸运地使用了deleting and re-creating the entire collection。有些人建议它是bad idea to store them as objects in the first place，在这种情况下，您实际上可以.map这些对象，并在保存之前将它们转换为其本机字符串ID或ObjectID。

updated.posts = updated.posts.map(function(post){return post._id});
updated.save(...

希望这在某种程度上有所帮助，即使它不能解决它。