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当尝试更新 NeDB 数据库中的数据时，我得到了Field names cannot begin with the $ character但是它只发生在第二次或第三次更新数据库之后。

这是我用来更新/插入数据的代码：

addNew: function(data) {
  var deferred = $q.defer(),
      query = {
        _id: data._id,
        title: data.title,
        year: data.year,
        genres: data.genres,
        poster: data.poster
      };

  db.update(query, { $addToSet: { episodes: data.episodes[0] } }, { upsert: true }, function(err, numReplaced, upsert) {
    if (!err) {
      var data = numReplaced + '/' + upsert;
      deferred.resolve(data);
    } else {
      deferred.reject(err);
    }
  });

  return deferred.promise;
}

data.episodes[0]看起来像这样：

{
  "number": 5,
  "season": 3,
  "title": "Kissed by Fire",
  "overview": "The Hound is judged by the gods. Jaime is judged by men. Jon proves himself. Robb is betrayed. Tyrion learns the cost of weddings.",
  "screen": "http://slurm.trakt.us/images/episodes/1395-3-5.80.jpg"
}

我尝试更新的数据库中的数据如下所示：

{
  "_id": "tt0944947",
  "title": "Game of Thrones",
  "year": 2011,
  "genres": "Drama, Fantasy, Adventure",
  "poster": "http://slurm.trakt.us/images/posters/1395-300.jpg",
  "episodes": [
    {
      "number": 10,
      "season": 4,
      "title": "The Children",
      "overview": "Circumstances change after an unexpected arrival from north of the Wall. Daenerys must face harsh realities. Bran learns more about his destiny. Tyrion sees the truth about his situation.",
      "screen": "http://slurm.trakt.us/images/episodes/1395-4-10.80.jpg"
    }
  ]
}
4

1 回答 1

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当我尝试更新没有以 . 开头的字段名称的对象时，我遇到了同样的问题$。我通过复制对象以使用 angular.copy.

db.update(query, { $addToSet: { episodes: angular.copy(data.episodes[0]) } }, { upsert: true }, function(err, numReplaced, upsert) { ... });

angular.copy创建一个object或一个的深层副本array。

其他框架和库也有类似的方法（示例）。

于 2015-10-03T16:58:58.650 回答